10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2011

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from             to             

Commission File Number: 1-15259

ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

(Exact name of registrant as specified in its charter)

Bermuda	98-0214719
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

110 Pitts Bay Road	P.O. Box HM 1282
Pembroke HM08	Hamilton HM FX
Bermuda	Bermuda
(Address of principal executive offices)	(Mailing Address)

(441) 296-5858

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large Accelerated Filer  x Accelerated Filer    ¨ Non-accelerated Filer  ¨ Smaller Reporting Company  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

Indicate the number of shares outstanding of each of the issuer’s classes of common shares as of November 1, 2011.

Title	Outstanding
Common Shares, par value $1.00 per share	31,282,450

ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

INDEX

PART I.	FINANCIAL INFORMATION	3
Item 1.	Consolidated Financial Statements (unaudited)
	Consolidated Balance Sheets as of September 30, 2011 and December 31, 2010	3
	Consolidated Statements of (Loss) Income for the three and nine months ended September 30, 2011 and 2010	4
	Consolidated Statements of Comprehensive (Loss) Income for the three and nine months ended September 30, 2011 and 2010	5
	Consolidated Statements of Cash Flows for the nine months ended September 30, 2011 and 2010	6
	Notes to Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	31
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	45
Item 4.	Controls and Procedures	46
PART II.	OTHER INFORMATION	47
Item 1.	Legal Proceedings	47
Item 1a.	Risk Factors	48
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	48
Item 3.	Defaults Upon Senior Securities	48
Item 4.	Removed and Reserved	48
Item 5.	Other Information	49
Item 6.	Exhibits	49

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PART I. FINANCIAL INFORMATION

Item 1. Consolidated Financial Statements

ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

CONSOLIDATED BALANCE SHEETS

(in millions, except number of shares and per share amounts)

	September 30, 2011			December 31, 2010
	(Unaudited)
Assets
Investments:
Fixed maturities, at fair value:
Available-for-sale (cost: 2011 - $3,154.0; 2010 -$3,250.4)	$	3,259.0		$	3,361.4
Equity securities, at fair value (cost: 2011 - $267.9; 2010 - $208.8)		353.1			324.5
Other investments (cost: 2011 - $217.7; 2010 - $153.5)		214.1			154.2
Short-term investments, at fair value (cost: 2011 - $354.7; 2010 - $375.2)		354.1			375.3
Total investments		4,180.3			4,215.4
Cash		119.8			83.5
Accrued investment income		31.5			33.5
Premiums receivable		343.9			301.8
Reinsurance recoverables		1,107.0			1,203.9
Goodwill		153.8			153.8
Intangible assets, net of accumulated amortization		92.3			95.3
Current income taxes receivable, net		14.9			4.5
Deferred acquisition costs, net		136.2			139.7
Ceded unearned premiums		227.7			164.0
Other assets		95.3			93.1
Total assets		$6,502.7			$6,488.5
Liabilities and Shareholders’ Equity
Reserves for losses and loss adjustment expenses	$	3,349.6		$	3,152.2
Unearned premiums		723.4			654.1
Accrued underwriting expenses		87.3			84.3
Ceded reinsurance payable, net		429.6			524.3
Funds held		34.3			33.4
Other indebtedness		66.9			65.0
Junior subordinated debentures		311.5			311.5
Deferred tax liabilities, net		9.4			10.5
Other liabilities		24.4			27.1
Total liabilities		5,036.4			4,862.4
Shareholders’ equity:
Common shares - $1.00 par, 500,000,000 shares authorized;
31,274,221 and 31,206,796 shares issued and outstanding at September 30, 2011 and December 31, 2010, respectively		31.3			31.2
Additional paid-in capital		715.6			711.4
Treasury shares (4,544,329 and 3,363,560 shares at September 30, 2011 and December 31, 2010, respectively)		(148.4	)		(111.6	)
Retained earnings		753.7			847.5
Accumulated other comprehensive gain, net of taxes		114.1			147.6
Total shareholders’ equity		1,466.3			1,626.1
Total liabilities and shareholders’ equity		$6,502.7			$6,488.5

See accompanying notes.

3

ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

CONSOLIDATED STATEMENTS OF (LOSS) INCOME

(in millions, except number of shares and per share amounts)

(Unaudited)

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
	2011			2010		2011			2010
Premiums and other revenue:
Earned premiums	$	268.2		$	288.9	$	800.9		$	936.9
Net investment income		30.0			33.6		96.3			100.5
Fee income, net		1.4			1.7		1.8			2.0
Net realized investment and other gains		3.9			9.1		37.7			28.6
Total revenue		303.5			333.3		936.7			1,068.0
Expenses:
Losses and loss adjustment expenses		199.6			176.9		664.4			604.9
Underwriting, acquisition and insurance expenses		106.3			115.8		315.9			360.7
Interest expense		5.6			5.8		16.5			17.3
Foreign currency exchange (gain) loss		(1.9	)		3.4		11.1			(11.9	)
Total expenses		309.6			301.9		1,007.9			971.0
(Loss) income before income taxes		(6.1	)		31.4		(71.2	)		97.0
Provision for income taxes		6.0			8.4		12.6			27.2
Net (loss) income	$	(12.1	)	$	23.0	$	(83.8	)	$	69.8
Net (loss) income per common share:
Basic	$	(0.44	)	$	0.78	$	(3.06	)	$	2.33
Diluted	$	(0.44	)	$	0.77	$	(3.06	)	$	2.31
Dividend declared per common share:	$	0.12		$	0.12	$	0.36		$	0.36
Weighted average common shares:
Basic		27,237,788			29,504,900		27,374,953			29,998,803
Diluted		27,237,788			29,876,350		27,374,953			30,333,685
	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
	2011			2010		2011			2010
Realized investment and other gains before other-than-temporary impairment losses	$	5.1		$	9.1	$	38.9		$	29.4
Other-than-temporary impairment losses recognized in earnings
Other-than-temporary impairment losses on fixed maturities		(0.1	)		0.0		(0.1	)		(0.8	)
Other-than-temporary impairment losses on equity securities		(1.1	)		0.0		(1.1	)		0.0
Non-credit portion of loss recognized in other comprehensive income		0.0			0.0		0.0			0.0
Impairment losses recognized in earnings		(1.2	)		0.0		(1.2	)		(0.8	)
Net realized investment and other gains	$	3.9		$	9.1	$	37.7		$	28.6

See accompanying notes.

4

ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

(in millions)

(Unaudited)

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2011			2010			2011			2010
Net (loss) income	$	(12.1	)	$	23.0		$	(83.8	)	$	69.8
Other comprehensive (loss) income:
Foreign currency translation adjustments		(5.0	)		0.0			(4.9	)		0.0
Defined benefit pension plan:
Net loss arising during the period		(1.5	)		(0.3	)		(0.9	)		(0.3	)
Unrealized (losses) gains on securities:
(Losses) gains arising during the period		(50.0	)		86.8			(2.7	)		122.0
Reclassification adjustment for gains included in net (loss) income		(6.2	)		(4.2	)		(32.7	)		(22.1	)
Other comprehensive (loss) income before tax		(62.7	)		82.3			(41.2	)		99.6
Income tax (benefit) provision related to other comprehensive (loss) income:
Defined benefit pension plan:
Net loss arising during the period		(0.5	)		(0.1	)		(0.3	)		(0.1	)
Unrealized (losses) gains on securities:
(Losses) gains arising during the period		(9.2	)		23.7			3.1			40.2
Reclassification adjustment for gains included in net (loss) income		(1.9	)		(1.2	)		(10.5	)		(6.6	)
Income tax (benefit) provision related to other comprehensive (loss) income		(11.6	)		22.4			(7.7	)		33.5
Other comprehensive (loss) income, net of tax		(51.1	)		59.9			(33.5	)		66.1
Comprehensive (loss) income	$	(63.2	)	$	82.9		$	(117.3	)	$	135.9

See accompanying notes.

5

ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(in millions)

(Unaudited)

	For the Nine Months Ended September 30,
	2011			2010
Cash flows from operating activities:
Net (loss) income	$	(83.8	)	$	69.8
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Amortization and depreciation		22.5			24.4
Share-based payments expense		2.5			6.7
Excess tax expense from share-based payment arrangements		0.1			0.3
Deferred income tax provision (benefit), net		9.6			(4.7	)
Net realized investment gains		(31.3	)		(28.6	)
Loss on disposal of fixed assets, net		0.2			0.0
Change in:
Accrued investment income		2.0			(1.1	)
Receivables		55.2			198.7
Deferred acquisition costs		3.5			25.4
Ceded unearned premiums		(63.7	)		13.8
Reserves for losses and loss adjustment expenses		197.4			27.0
Unearned premiums		69.3			(53.9	)
Ceded reinsurance payable and funds held		(93.8	)		(216.9	)
Income taxes		(10.4	)		4.2
Accrued underwriting expenses		3.9			(15.9	)
Sale of trading investment		0.0			2.1
Other, net		(18.1	)		(21.8	)
Cash provided by operating activities		65.1			29.5
Cash flows from investing activities:
Sales of fixed maturity investments		1,020.9			1,668.1
Maturities and mandatory calls of fixed maturity investments		296.7			324.5
Sales of equity securities		29.8			47.4
Sales of other investments		2.4			0.1
Purchases of fixed maturity investments		(1,199.1	)		(1,877.8	)
Purchases of equity securities		(75.5	)		(16.7	)
Purchases of other investments		(51.9	)		(17.5	)
Change in foreign regulatory deposits		(13.2	)		(14.1	)
Change in short-term investments		21.0			(5.9	)
Purchases of fixed assets		(10.7	)		(11.8	)
Other, net		0.8			(2.0	)
Cash provided by investing activities		21.2			94.3
Cash flows from financing activities:
Activity under stock incentive plans		0.9			1.6
Repurchase of Company’s common shares		(35.9	)		(66.2	)
Excess tax expense from share-based payment arrangements		(0.1	)		(0.3	)
Payment of cash dividend to common shareholders		(10.0	)		(10.8	)
Cash used by financing activities		(45.1	)		(75.7	)
Effect of exchange rate changes on cash		(4.9	)		0.0
Change in cash		36.3			48.1
Cash, beginning of period		83.5			18.1
Cash, end of period	$	119.8		$	66.2

See accompanying notes.

6

ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Basis of Presentation

The accompanying consolidated financial statements of Argo Group International Holdings, Ltd. (“Argo Group,” “we” or the “Company”) and its subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. The preparation of interim financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The major estimates reflected in our consolidated financial statements include, but are not limited to, the reserves for losses and loss adjustment expenses, reinsurance recoverables, including the reinsurance recoverables allowance for doubtful accounts, estimates of written and earned premiums, reinsurance premium receivable, the fair value of investments, the valuation of goodwill and our deferred tax asset valuation allowance. Actual results could differ from those estimates. Certain financial information that normally is included in annual financial statements, including certain financial statement footnotes, prepared in accordance with GAAP, is not required for interim reporting purposes and has been condensed or omitted. These statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2010, filed with the Securities and Exchange Commission on February 28, 2011.

The interim financial information as of, and for the three and nine months ended, September 30, 2011 and 2010 is unaudited. However, in the opinion of management, the interim information includes all adjustments, consisting of normal recurring accruals, necessary for a fair statement of the results presented for the interim periods. The operating results for the interim periods are not necessarily indicative of the results to be expected for the full year. All significant intercompany amounts have been eliminated in consolidation. Certain amounts applicable to prior periods have been reclassified to conform to the presentation followed as of September 30, 2011.

During the first quarter of 2011, we evaluated the current operating structure of our Bermuda and London-based business segments, in conjunction with management changes impacting these operations. To more appropriately align our operating structure with the management changes, we concluded that operating activities associated with our London operations (our former International Specialty segment) will be principally managed and evaluated as a Lloyd’s of London (“Lloyd’s”) market syndicate business, while our Bermuda operations (our former Reinsurance segment) will serve as the center for our international insurance and reinsurance business, including our product development and global strategic expansion initiatives. These changes resulted in our Bermuda operations now being identified as our International Specialty segment. Our London based operation will be focused on the management and growth of our Lloyd’s syndicate operations and this segment will now be known as Syndicate 1200.

The balance sheet at December 31, 2010, has been derived from the audited consolidated financial statements of Argo Group at that date but does not include all of the information required by GAAP for complete financial statements.

2. Recently Issued Accounting Standards

In October 2010, the Financial Accounting Standards Board (“FASB”) issued an accounting update that amends the guidance in the FASB Accounting Standards Codification Topic 944, entitled “Financial Services – Insurance.” The amendments in the update modify the definition of the types of costs incurred by insurance entities that can be capitalized in the acquisition of new and renewal contracts. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2011. The amendments in this update are to be applied prospectively upon adoption. Retrospective application to all prior periods presented upon the date of adoption also is permitted, but not required. We expect to apply the retrospective application of this standard

7

upon adoption and, therefore, will revise the income statements presented, with a cumulative adjustment to retained earnings. Based on our initial evaluation of this update, we anticipate that upon adoption we will record an adjustment to retained earnings between $30.0 million to $35.0 million.

In May 2011, the FASB issued amendments to “Fair Value Measurement” (Topic 820). The amendments were to achieve common fair value measurement and disclosure requirements in GAAP and International Financial Reporting Standards. Some of the amendments clarify the FASB’s intent about the application of existing fair value measurement requirements. Other amendments change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements. There are changes to how premiums and discounts are applied. There are clarifications made to principal market determination. The amendments also clarify that the highest and best use and valuation premise concepts are not applicable to financial instruments. There are amendments that indicate how a company should determine the fair value of its own equity instruments and the fair value of liabilities. New disclosures, with a particular focus on Level 3 measurement, are required. All transfers between Level 1 and Level 2 will now be required to be disclosed. Information about when the current use of a non-financial asset measured at fair value differs from its highest and best use is to be disclosed. The amendments in this update are to be applied prospectively. The amendments are effective during interim and annual periods beginning after December 15, 2011. Early application is not permitted. We are currently evaluating this update to determine the potential impact, if any, the adoption may have on our financial results and disclosures.

In June 2011, the FASB issued amendments to the presentation of comprehensive income. The amendments eliminate the option to present components of other comprehensive income as part of the statement of changes in shareholders’ equity. The amendment provides the option to present other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. Both options require the presentation of each component of net income along with the total net income, each component of other comprehensive income along with a total for other comprehensive income, and a total amount for comprehensive income. The components of other comprehensive income have not changed, nor has the guidance on when other comprehensive income items are reclassified to net income. All reclassification adjustments from other comprehensive income to net income are required to be presented on the face of the statement of comprehensive income. The amendments in this update are to be applied prospectively. Early application is permitted. The amendments are effective during interim and annual periods beginning after December 15, 2011. This update will have no impact on our Consolidated Statement of Comprehensive (Loss) Income, but may have an impact on other disclosures or financial statement presentation.

In December 2010, the FASB issued an accounting update that amends the guidance for goodwill impairment testing for reporting units with a zero or negative carrying amount. For those reporting units, an entity is required to perform Step 2 of the goodwill impairment test if it is more likely than not that goodwill impairment exists. In determining whether it is more likely than not that goodwill impairment exists, an entity should consider whether there are any adverse qualitative factors indicating that impairment may exist. The qualitative factors are consistent with the existing guidance and examples provided in codification, which requires that goodwill of a reporting unit be tested for impairment between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2010. Upon adoption of the amendments, if the entity determines that it is more likely than not that the goodwill of one or more of its reporting units is impaired, the entity should perform Step 2 of the goodwill impairment test for those reporting units. Any resulting goodwill impairment should be recorded as a cumulative-effect adjustment to beginning retained earnings in the period of adoption. Any goodwill impairments occurring after the initial adoption of the amendments should be included in earnings. Since adoption, this update has had no impact on our financial results and disclosures.

In September 2011, the FASB issued an accounting update to simplify how entities test goodwill for impairment. The amendments permit an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to

8

perform the two-step goodwill impairment test described in Topic 350, “Intangibles – Goodwill and Other.” The more-likely-than-not threshold is defined as having a likelihood of more than 50 percent. Previous guidance required an entity to test goodwill for impairment on at least an annual basis by comparing the fair value of a reporting unit with its carrying amount, including goodwill (step one). If the fair value of a reporting unit is less than its carrying amount, then the second step of the test must be performed to measure the amount of the impairment loss, if any. Under the amendments of the update, an entity is not required to calculate the fair value of a reporting unit unless the entity determines that it is more likely than not that its fair value is less than its carrying amount. The amendments are effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. Early adoption is permitted, including for annual and interim goodwill impairment tests performed as of a date before September 15, 2011, if an entity’s financial statements for the most recent annual or interim period have not yet been issued or, for nonpublic entities, have not yet been made available for issuance. We are currently evaluating this update to determine the potential impact, if any, the adoption may have on our financial results and disclosures.

3. Investments

Composition of Invested Assets

The amortized cost, gross unrealized gains, gross unrealized losses and fair value of investments as of September 30, 2011 and December 31, 2010 were as follows:

September 30, 2011	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in millions)
Fixed maturities
USD denominated:
U.S. Governments (1)	$	502.7	$	14.3	$	0.1	$	516.9
Non-U.S. Governments		45.4		0.3		2.5		43.2
Obligations of states and political subdivisions		584.9		41.0		0.7		625.2
Credit-Financial		389.3		10.3		6.6		393.0
Credit-Industrial		406.4		17.9		6.6		417.7
Credit-Utility		165.4		6.5		2.3		169.6
Structured securities:
CMO/MBS-agency (2)		525.1		33.8		0.2		558.7
CMO/MBS-non agency		20.7		0.8		0.7		20.8
CMBS (3)		108.8		4.9		0.3		113.4
ABS-residential (4)		16.3		0.1		2.0		14.4
ABS-non residential		70.1		1.3		0.0		71.4
Foreign denominated:
Governments		221.8		7.6		9.0		220.4
Credit		97.1		2.3		5.1		94.3
Total fixed maturities		3,154.0		141.1		36.1		3,259.0
Equity securities		267.9		98.5		13.3		353.1
Other investments		217.7		0.7		4.3		214.1
Short-term investments		354.7		0.0		0.6		354.1
Total investments	$	3,994.3	$	240.3	$	54.3	$	4,180.3

⁽¹⁾  Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $72.3 million amortized cost, $73.2 million fair value.

⁽²⁾ Collateralized mortgage obligations/mortgage-backed securities (“CMO/MBS”).

⁽³⁾ Commercial mortgage-backed securities (“CMBS”).

⁽⁴⁾ Asset-backed securities (“ABS”).

9

December 31, 2010	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in millions)
Fixed maturities
USD denominated:
U.S. Governments (1)	$	430.3	$	11.3	$	0.8	$	440.8
Non-U.S. Governments		6.2		0.2		0.0		6.4
Obligations of states and political subdivisions		630.6		25.6		2.9		653.3
Credit-Financial		370.5		12.3		1.7		381.1
Credit-Industrial		378.3		17.6		0.8		395.1
Credit-Utility		164.8		6.4		0.4		170.8
Structured securities:
CMO/MBS-agency (2)		665.7		33.9		0.5		699.1
CMO/MBS-non agency		37.4		1.5		0.6		38.3
CMBS (3)		143.6		6.3		0.9		149.0
ABS-residential (4)		19.3		0.1		2.3		17.1
ABS-non residential		127.7		2.4		0.0		130.1
Foreign denominated:
Governments		202.1		9.5		4.9		206.7
Credit		73.9		2.8		3.1		73.6
Total fixed maturities		3,250.4		129.9		18.9		3,361.4
Equity securities		208.8		116.5		0.8		324.5
Other investments		153.5		0.7		0.0		154.2
Short-term investments		375.2		0.1		0.0		375.3
Total investments	$	3,987.9	$	247.2	$	19.7	$	4,215.4

⁽¹⁾  Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $87.7 million amortized cost, $89.3 million fair value.

⁽²⁾  Collateralized mortgage obligations/mortgage-backed securities (“CMO/MBS”).

⁽³⁾ Commercial mortgage-backed securities (“CMBS”).

⁽⁴⁾ Asset-backed securities (“ABS”).

Included in total investments at September 30, 2011 and December 31, 2010 is $170.7 million and $170.4 million, respectively, of assets managed on behalf of the trade capital providers, who are third party capital participants that provide underwriting capital to our Syndicate 1200 segment (formerly the International Specialty segment).

Contractual Maturity

The amortized cost and fair values of fixed maturity investments as of September 30, 2011, by contractual maturity, were as follows:

(in millions)	Amortized Cost		Fair Value
Due in one year or less	$	266.7	$	266.7
Due after one year through five years		1,307.4		1,339.2
Due after five years through ten years		698.2		727.3
Thereafter		140.7		147.1
Structured securities		741.0		778.7
Total	$	3,154.0	$	3,259.0

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The expected maturities may differ from the contractual maturities because debtors may have the right to call or prepay obligations.

Unrealized Losses and Other-Than-Temporary Impairments

An aging of unrealized losses on our investments at September 30, 2011 and December 31, 2010 is presented below:

September 30, 2011	Less Than One Year					One Year or Greater				Total
	Fair			Unrealized		Fair		Unrealized		Fair			Unrealized
(in millions)	Value			Losses		Value		Losses		Value			Losses
Fixed maturities
USD denominated:
U.S. Governments	$	29.0		$	0.1	$	0.0	$	0.0	$	29.0		$	0.1
Non-U.S. Governments		30.4			2.5		0.0		0.0		30.4			2.5
Obligations of states and political subdivisions		16.0			0.1		0.4		0.6		16.4			0.7
Credit-Financial		118.5			5.7		6.2		0.9		124.7			6.6
Credit-Industrial		121.4			6.6		0.0		0.0		121.4			6.6
Credit-Utility		38.9			2.3		0.0		0.0		38.9			2.3
Structured securities:
CMO/MBS-agency		22.4			0.2		0.0		0.0		22.4			0.2
CMO/MBS-non agency		7.2			0.2		4.3		0.5		11.5			0.7
CMBS (1)		2.5			0.0		4.4		0.3		6.9			0.3
ABS-residential		4.9			0.3		6.8		1.7		11.7			2.0
ABS-non residential (1)		3.5			0.0		0.0		0.0		3.5			0.0
Foreign denominated:
Governments		159.5			9.0		0.0		0.0		159.5			9.0
Credit		77.0			4.9		4.3		0.2		81.3			5.1
Total fixed maturities		631.2			31.9		26.4		4.2		657.6			36.1
Equity securities		121.5			13.2		0.2		0.1		121.7			13.3
Other investments		(4.3	)		4.3		0.0		0.0		(4.3	)		4.3
Short-term investments		32.2			0.6		0.0		0.0		32.2			0.6
Total	$	780.6		$	50.0	$	26.6	$	4.3	$	807.2		$	54.3

⁽¹⁾  Unrealized losses less than one year are less than $0.1 million.

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December 31, 2010	Less Than One Year				One Year or Greater				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(in millions)	Value		Losses		Value		Losses		Value		Losses
Fixed maturities
USD denominated:
U.S. Governments (2)	$	55.2	$	0.8	$	2.0	$	0.0	$	57.2	$	0.8
Obligations of states and political subdivisions		122.6		2.6		2.9		0.3		125.5		2.9
Credit-Financial		53.7		0.6		14.8		1.1		68.5		1.7
Credit-Industrial		44.3		0.8		0.0		0.0		44.3		0.8
Credit-Utility		21.7		0.4		0.0		0.0		21.7		0.4
Structured securities:
CMO/MBS-agency		26.5		0.5		0.0		0.0		26.5		0.5
CMO/MBS-non agency		1.1		0.3		6.6		0.3		7.7		0.6
CMBS		5.3		0.1		8.7		0.8		14.0		0.9
ABS-residential		6.4		0.3		8.5		2.0		14.9		2.3
ABS-non residential (1) (2)		1.5		0.0		0.7		0.0		2.2		0.0
Foreign denominated:
Governments		82.9		3.1		32.3		1.8		115.2		4.9
Credit		26.1		1.3		15.8		1.8		41.9		3.1
Total fixed maturities		447.3		10.8		92.3		8.1		539.6		18.9
Equity securities		9.8		0.8		0.0		0.0		9.8		0.8
Short-term investments (1)		4.3		0.0		0.0		0.0		4.3		0.0
Total	$	461.4	$	11.6	$	92.3	$	8.1	$	553.7	$	19.7

⁽¹⁾  Unrealized losses less than one year are less than $0.1 million.

⁽²⁾  Unrealized losses one year or greater are less than $0.1 million.

We hold a total of 5,220 securities, of which 1,719 were in an unrealized loss position for less than one year and 44 were in an unrealized loss position for a period one year or greater as of September 30, 2011. Unrealized losses greater than twelve months on fixed maturities were the result of a number of factors, including increased credit spreads, foreign currency fluctuations, and higher market yields relative to the date the securities were purchased, and for structured securities, by the performance of the underlying collateral as well. We do not consider these investments to be other-than-temporarily impaired at September 30, 2011.

We regularly evaluate our investments for impairment. For fixed maturity securities, the evaluation for a credit loss is generally based on the present value of expected cash flows of the security as compared to the amortized book value. For MBS and residential ABS securities, frequency and severity of loss inputs are used in projecting future cash flows of the securities. Loss frequency is measured as the credit default rate, which includes such factors as loan-to-value ratios and credit scores of borrowers. Loss severity includes such factors as trends in overall housing prices and house prices that are obtained at foreclosure. We recognized other-than-temporary losses on our fixed maturities portfolio of $0.1 million for the three and nine months ended September 30, 2011. For equity securities, the length of time and the amount of decline in fair value are the principal factors in determining other-than-temporary impairment. We recognized other-than-temporary losses on our equity portfolio of $1.1 million for the three and nine months ended September 30, 2011.

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Realized Gains and Losses

The following table presents the Company’s gross realized investment and other gains (losses) for the three and nine months ended September 30:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Realized gains
Fixed maturities	$	8.4		$	5.3		$	25.5		$	27.0
Equity securities		0.9			0.9			15.7			4.4
Short-term and other investments		3.9			5.2			12.6			6.9
Gross realized gains		13.2			11.4			53.8			38.3
Realized losses
Fixed maturities		(2.5	)		(2.0	)		(6.8	)		(7.4	)
Equity securities		0.0			(0.2	)		(0.7	)		(1.1	)
Short-term and other investments		(5.6	)		(0.1	)		(7.4	)		(0.4	)
Other-than-temporary impairment losses on fixed maturities		(0.1	)		0.0			(0.1	)		(0.8	)
Other-than-temporary impairment losses on equity securities		(1.1	)		0.0			(1.1	)		0.0
Gross realized losses		(9.3	)		(2.3	)		(16.1	)		(9.7	)
Net realized investment and other gains	$	3.9		$	9.1		$	37.7		$	28.6

We enter into short-term, currency spot and forward contracts to mitigate foreign exchange rate exposure for certain non-U.S. Dollar denominated fixed maturity investments. The forward contracts used are typically less than sixty days and are renewed, as long as the non-U.S. Dollar denominated fixed maturity investments are held in our portfolio. These forward contracts are designated as fair value hedges for accounting purposes.

Foreign exchange unrealized gains on bonds of $0.5 million were offset by foreign exchange realized losses on forwards of $0.5 million for the three and nine months ended September 30, 2011 and are reflected in realized gains and losses in the Consolidated Statements of (Loss) Income and in the table above. As of September 30, 2011, we hedged $4.3 million of certain holdings in non-U.S. denominated fixed maturity investments with the same amount of foreign exchange forward contracts.

We also enter into foreign currency exchange forward contracts to manage currency exposure on losses related to global catastrophe events. These currency forward contracts are carried at fair value in the Consolidated Balance Sheets in Other investments. The realized and unrealized gains and losses are included in realized gains or losses in the Consolidated Statements of (Loss) Income. The notional amount of the currency forward contracts as of September 30, 2011 was $133.4 million. The fair value of the currency forward contracts as of September 30, 2011 was a loss of $4.3 million. For the three and nine months ended September 30, 2011, we recognized $1.1 million in realized losses and $2.8 million in realized gains, respectively, from the currency forward contracts.

Regulatory Deposits, Pledged Securities and Letters of Credit

At September 30, 2011, the amortized cost and fair value of investments on deposit with U.S. and various other regulatory agencies for regulatory purposes and reinsurance were $238.7 million and $253.8 million, respectively.

Investments with an amortized cost of $180.6 million and fair value of $184.9 million were pledged as collateral in support of irrevocable letters of credit at September 30, 2011. These assets support irrevocable letters of credit issued under the terms of certain reinsurance agreements in respect of reported loss and loss expense reserves in the amount of $31.8 million and our Corporate member’s capital as security to support the underwriting business at Lloyd’s in the amount of $127.5 million.

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At September 30, 2011, our Corporate member’s capital supporting our Lloyd’s business consisted of:

(in millions)
Letters of credit	$	127.5
Fixed maturities, at fair value		140.7
Short-term investments, at fair value		4.8
Total securities and letters of credit pledged to Lloyd’s	$	273.0

Fair Value Measurements

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability, or in the absence of a principal market, the most advantageous market. Market participants are buyers and sellers in the principal (or most advantageous) market that are independent, knowledgeable, able to transact for the asset or liability and willing to transfer for the asset or liability.

Valuation techniques consistent with the market approach, income approach and/or cost approach are used to measure fair value. The inputs of these valuation techniques are categorized into three levels.

• Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that can be accessed at the reporting date. We define actively traded as a security that has traded in the past seven days. We receive one quote per instrument for Level 1 inputs.

• Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. We receive one quote per instrument for Level 2 inputs.

• Level 3 inputs are unobservable inputs. Unobservable inputs reflect our own assumptions about the assumptions market participants would use in pricing the asset or liability based on the best information available in the circumstances.

We receive fair value prices from independent pricing services and our independent investment managers. These prices are determined using observable market information such as dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things. We have reviewed the processes used by the third party providers for pricing the securities, and have determined that these processes result in fair values consistent with GAAP requirements. In addition, we reviewed these prices for reasonableness, and have not adjusted any prices received from the third-party providers as of September 30, 2011. A description of the valuation techniques we use to measure assets at fair value is as follows:

Fixed Maturities (Available-for-Sale) Levels 1 and 2:

• United States Treasury securities are typically valued using Level 1 inputs. For these securities, we obtain fair value measurements from independent pricing services using quoted prices (unadjusted) in active markets at the reporting date.

• United States Government agencies, non-U.S. Government securities, obligations of states and political subdivisions, credit securities and foreign denominated securities are reported at fair value utilizing Level 2 inputs. For these securities, we obtain fair value measurements from third party pricing services.

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• CMO/MBS agency securities are reported at fair value utilizing Level 2 inputs. For these securities, we obtain fair value measurements from third party pricing services. Observable data may include dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things. All of these securities are backed by United States agencies and are of the highest investment grade.

• CMO/MBS non-agency, CMBS, ABS residential, and ABS non-residential securities are reported at fair value utilizing Level 2 inputs. For these securities, we obtain fair value measurements from third party pricing services. Observable data may include dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security’s terms and conditions, among other things.

Fixed Maturities (Available-for-Sale) Level 3:

• Corporate securities reported at fair value utilizing Level 3 inputs are infrequently traded securities valued by an independent investment manager utilizing unobservable inputs.

Transfers Between Level 1 and Level 2 Securities: There were no transfers between Level 1 and Level 2 securities during the nine month period ended September 30, 2011.

Equity Securities Level 1: Equity securities are principally reported at fair value utilizing Level 1 inputs. For these securities, we obtain fair value measurements from a third party pricing service using quoted prices (unadjusted) in active markets at the reporting date.

Equity Securities Level 2: We own an interest in a mutual fund that is reported at fair value utilizing Level 2 inputs. The valuation is based on the fund’s net asset value per share, determined weekly and at the end of each month. The underlying assets in the fund are valued primarily on the basis of closing market quotations or official closing prices on each valuation day.

Equity Securities Level 3: We own certain equity securities that are reported at fair value utilizing Level 3 inputs. The valuation techniques for these securities include the following:

• Fair value measurements are obtained from the National Association of Insurance Commissioners’ Security Valuation Office at the reporting date.

• We used a quoted market price and adjusted the price using unobservable inputs due to certain restrictions as to the ability to sell a security.

• We obtained fair value measurements for an investment in an equity fund by applying final prices provided by the administrator of the fund, which is based upon certain estimates and assumptions.

Other Investments Level 2: Foreign regulatory deposits are assets held in trust in jurisdictions where there is a legal and regulatory requirement to maintain funds locally in order to protect policyholders. Lloyd’s is the appointed investment manager for the funds. These assets are invested in short term government securities, agency securities and corporate bonds and are valued utilizing Level 2 inputs based upon values obtained from Lloyd’s. Foreign currency future contracts are valued by our counterparty utilizing market driven foreign currency exchange rates and are considered Level 2 investments. There were no transfers of other investments between Level 1 and Level 2 for the nine months ended September 30, 2011.

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Short-term Investments: Short-term investments are principally reported at fair value utilizing Level 1 inputs, with the exception of short-term corporate bonds reported at fair value utilizing Level 2 inputs as described in the fixed maturity section above. Values for the investments categorized as Level 1 are obtained from various financial institutions as of the reporting date. Included in short-term investments are Funds at Lloyd’s, which represent a portion of our Corporate member’s capital as security to support the underwriting business at Lloyd’s and include fixed cash deposit accounts, certificates of deposits, sovereign debt, United Kingdom short government gilts and U.S. Treasury bills. There were no transfers of short-term investments between Level 1 and Level 2 for the nine months ended September 30, 2011.

Based on an analysis of the inputs, our financial assets measured at fair value on a recurring basis at September 30, 2011 and December 31, 2010 have been categorized as follows:

			Fair Value Measurements at Reporting Date Using
(in millions)	September 30, 2011		Level 1 (a)		Level 2 (b)		Level 3 (c)
Fixed maturities
USD denominated:
U.S. Governments	$	516.9	$	241.7	$	275.2	$	0.0
Non-U.S. Governments		43.2		0.0		43.2		0.0
Obligations of states and political subdivisions		625.2		0.0		625.2		0.0
Credit-Financial		393.0		0.0		392.3		0.7
Credit-Industrial		417.7		0.0		417.7		0.0
Credit-Utility		169.6		0.0		169.6		0.0
Structured securities:
CMO/MBS-agency		558.7		0.0		558.7		0.0
CMO/MBS-non agency		20.8		0.0		20.8		0.0
CMBS		113.4		0.0		113.4		0.0
ABS-residential		14.4		0.0		14.4		0.0
ABS-non residential		71.4		0.0		71.4		0.0
Foreign denominated:
Governments		220.4		0.0		220.4		0.0
Credit		94.3		0.0		94.3		0.0
Total fixed maturities		3,259.0		241.7		3,016.6		0.7
Equity securities		353.1		292.7		49.9		10.5
Other investments		102.0		0.0		102.0		0.0
Short-term investments		354.1		341.7		12.4		0.0
	$	4,068.2	$	876.1	$	3,180.9	$	11.2

^(a)  Quote prices in active markets for identical assets

^(b)  Significant other observable inputs

^(c)  Significant unobservable inputs

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			Fair Value Measurements at Reporting Date Using
(in millions)	December 31, 2010		Level 1 (a)		Level 2 (b)		Level 3 (c)
Fixed maturities
USD denominated:
U.S. Governments	$	440.8	$	146.2	$	294.6	$	0.0
Non-U.S. Governments		6.4		0.0		6.4		0.0
Obligations of states and political subdivisions		653.3		0.0		653.3		0.0
Credit-Financial		381.1		0.0		380.4		0.7
Credit-Industrial		395.1		0.0		395.1		0.0
Credit-Utility		170.8		0.0		170.8		0.0
Structured securities:
CMO/MBS-agency		699.1		0.0		699.1		0.0
CMO/MBS-non agency		38.3		0.0		38.3		0.0
CMBS		149.0		0.0		149.0		0.0
ABS-residential		17.1		0.0		17.1		0.0
ABS-non residential		130.1		0.0		130.1		0.0
Foreign denominated:
Governments		206.7		0.0		206.7		0.0
Credit		73.6		0.0		73.6		0.0
Total fixed maturities		3,361.4		146.2		3,214.5		0.7
Equity securities		324.5		253.3		50.2		21.0
Other investments		91.0		0.0		91.0		0.0
Short-term investments		375.3		369.0		6.3		0.0
	$	4,152.2	$	768.5	$	3,362.0	$	21.7

^(a)  Quote prices in active markets for identical assets

^(b)  Significant other observable inputs

^(c)  Significant unobservable inputs

The fair value measurements in the tables above do not agree to “Total investments” on the Consolidated Balance Sheets as they exclude certain other investments that are accounted for under the equity-method of accounting and are not included in this disclosure.

A reconciliation of the beginning and ending balances for the investments categorized as Level 3 at September 30, 2011 and December 31, 2010 are as follows:

Fair Value Measurements Using Unobservable Inputs (Level 3)

(in millions)	Credit Financial		Equity Securities			Total
Beginning balance, January 1, 2011	$	0.7	$	21.0		$	21.7
Transfers into Level 3		0.0		0.0			0.0
Transfers out of Level 3		0.0		0.0			0.0
Total gains or losses (realized/unrealized):
Included in net loss		0.0		9.6			9.6
Included in other comprehensive income		0.0		(7.6	)		(7.6	)
Purchases, issuances, sales, and settlements
Purchases		0.0		0.0			0.0
Issuances		0.0		0.0			0.0
Sales		0.0		(12.5	)		(12.5	)
Settlements		0.0		0.0			0.0
Ending balance, September 30, 2011	$	0.7	$	10.5		$	11.2
Amount of total gains or losses for the period included in net loss attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2011	$	0.0	$	0.0		$	0.0

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Fair Value Measurements Using Unobservable Inputs (Level 3)

(in millions)	Credit Financial		Equity Securities			Total
Beginning balance, January 1, 2010	$	0.7	$	14.0		$	14.7
Transfers into Level 3		0.0		7.7			7.7
Transfers out of Level 3		0.0		(1.3	)		(1.3	)
Total gains or losses (realized/unrealized):
Included in net income		0.0		0.0			0.0
Included in other comprehensive income		0.0		1.8			1.8
Purchases, issuances, sales, and settlements
Purchases		0.0		0.0			0.0
Issuances		0.0		0.0			0.0
Sales		0.0		(1.2	)		(1.2	)
Settlements		0.0		0.0			0.0
Ending balance, December 31, 2010	$	0.7	$	21.0		$	21.7
Amount of total gains or losses for the period included in net income attributable to the change in unrealized gains or losses relating to assets still held at December 31, 2010	$	0.0	$	0.0		$	0.0

At September 30, 2011, we did not have any financial assets or financial liabilities measured at fair value on a nonrecurring basis.

4.    Shareholders’ Equity

On August 5, 2011 and August 10, 2010, our Board of Directors declared a quarterly cash dividend in the amount of $0.12 on each share of common stock outstanding. On September 15, 2011 and 2010, we paid $3.3 million and $3.5 million to our shareholders of record on September 1, 2011 and 2010, respectively. For the nine months ended September 30, 2011 and 2010, we have paid cash dividends totaling $10.0 million and $10.8 million to our shareholders.

On February 18, 2011, our Board of Directors authorized the repurchase of up to $150.0 million of our common shares (“2011 Repurchase Authorization”). The 2011 Repurchase Authorization supersedes the November 13, 2007 repurchase authorization (“2007 Repurchase Authorization”), which also had authorized the repurchase of up to $150.0 million of our common shares. From inception of the repurchase authorizations through October 7, 2011, we have repurchased 4,588,261 shares of our common stock at an average price of $32.63 for a total cost of $149.7 million. These shares are being held as treasury shares in accordance with the provisions of the Bermuda Companies Act 1981. As of October 7, 2011, availability under the 2011 Repurchase Authorization for future repurchases of our common shares was $126.7 million.

A summary of activity from January 1, 2011 through October 7, 2011 follows.

For the three months ended September 30, 2011, we repurchased 310,321 common shares on the open market for $8.3 million. For the nine months ended September 30, 2011, we repurchased 340,321 common shares on the open market for $9.3 million.

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In 2011, we repurchased shares under Securities Exchange Act of 1934 Rule 10b5-1 trading plans as follows:

Date Trading Plan Initiated	Trading Plan’s 2011 Purchase Period	Number of Shares Repurchased		Average Price of Shares Repurchased		Total Cost (in millions)		Repurchase Authorization Year
12/15/2010	01/01/11-02/22/11 (1)		406,290	$	36.59	$	14.8		2007
03/15/2011	03/16/11-04/27/11		123,539	$	32.02		4.0		2011
09/15/2011	09/16/11-10/07/11 (2)		354,551	$	28.20		10.0		2011

⁽¹⁾  The above table only reflects the 2011 activity under this Rule 10b5-1 trading plan. In 2010, 110,300 shares were repurchased under this Rule 10b5-1 trading plan for a total cost of $4.2 million. Total shares repurchased in 2010 and 2011 under this Rule 10b5-1 trading plan are 516,590 shares at an average price of $36.94 for a total cost of $19.0 million.

⁽²⁾  Through September 30, 2011, 310,619 shares were repurchased at an average price of $28.16 for a total cost of $8.7 million.

5.    Net (Loss) Income Per Common Share

The following table presents the calculation of net (loss) income per common share on a basic and diluted basis for the three and nine months ended September 30, 2011 and 2010:

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
(in millions, except number of shares and per share amounts)	2011			2010		2011			2010
Net (loss) income	$	(12.1	)	$	23.0	$	(83.8	)	$	69.8
Weighted average common shares outstanding - basic		27,237,788			29,504,900		27,374,953			29,998,803
Effect of dilutive securities
Equity compensation awards		0			371,450		0			334,882
Weighted average common shares outstanding - diluted		27,237,788			29,876,350		27,374,953			30,333,685
Net (loss) income per common share - basic	$	(0.44	)	$	0.78	$	(3.06	)	$	2.33
Net (loss) income per common share - diluted	$	(0.44	)	$	0.77	$	(3.06	)	$	2.31

Excluded from the weighted average common shares outstanding calculation at September 30, 2011 and 2010 are 4,544,329 shares and 2,374,101 shares, respectively, which are held as treasury shares. The shares are excluded as of their repurchase date. For the three and nine months ended September 30, 2011, the equity compensation awards are excluded from the calculation of diluted earnings per common share because the net loss would cause their effect to be anti-dilutive. For the three and nine months ended September 30, 2010, equity compensation awards to purchase 894,068 shares of common stock were excluded from the computation of diluted net income per common share as these instruments were anti-dilutive. These instruments expire at varying times from 2011 through 2016.

6.    Commitments and Contingencies

On December 4, 2008, a lawsuit was filed against PXRE Group Ltd. (now Argo Group) and certain of PXRE’s former officers in United States District Court for the Southern District of New York alleging causes of action on behalf of a group of institutional shareholders that purchased Series D Perpetual Non-voting Preferred Shares of PXRE pursuant to the Private Placement Memorandum dated on or about September 28, 2005 (the “Private Placement”). The lawsuit alleges that the Private Placement was a public offering and that the Private Placement Memorandum contained false and misleading statements or omissions concerning PXRE’s business, prospects and operations actionable under Section 12(a) (2) of the Securities Act of 1933. In addition, the lawsuit alleges claims under New York state law for negligent misrepresentation and common law fraud based upon, among other things, statements contained in the Private Placement Memorandum and alleged false and misleading statements by PXRE’s named former officers. The

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facts and circumstances of the Private Placement litigation arise generally out of statements or alleged omissions relating to the impact of hurricanes Katrina, Rita and Wilma on PXRE. On April 6, 2009, the institutional investors filed an amended complaint. Argo Group filed a motion to dismiss the amended complaint on May 6, 2009. On January 26, 2010, the District Court granted our motion, dismissing the plaintiffs’ federal law causes of action without prejudice, and holding that the amended complaint failed to allege facts that would show that the Private Placement could be construed to be a public offering or that the Private Placement should be integrated with PXRE’s public share offering. The Court’s order provided the plaintiffs with a deadline of February 22, 2010 to file amended pleadings setting forth the nature of the entities to which the Private Placement was offered. Based on the dismissal of the federal law claims, the Court’s order also dismissed without prejudice all state law claims asserted by the plaintiffs for lack of subject matter jurisdiction, without prejudice to the plaintiffs’ right to file a separate action in state court asserting such claims. On February 22, 2010, the plaintiffs filed a Second Amended Complaint in the District Court case seeking to overcome the deficiencies outlined in the order of dismissal. At a pre-motion conference held on April 14, 2010, the Court indicated that the Second Amended Complaint was also insufficient to raise an issue of fact as to the federal law causes of action. The Court allowed plaintiffs a third opportunity to replead, and plaintiffs filed their Third Amended Complaint on April 23, 2010. On May 14, 2010, we filed a Motion to Dismiss Plaintiffs’ Third Amended Complaint. On March 16, 2011, the Court heard arguments on this motion. The Court denied our motion as to certain threshold arguments regarding plaintiffs’ federal securities claims, finding that they raised factual issues. The Court directed the parties to engage in limited discovery in an attempt to resolve these factual issues. The Court’s March 16 decision did not extend to certain other arguments for dismissal of plaintiffs’ federal claims, nor to our arguments with respect to plaintiffs’ state law claims.

At this stage, Argo Group is unable to determine with any reasonable certainty the specific claims, litigants, or alleged damages that ultimately may be associated with the Private Placement lawsuit or any other future proceedings regarding the alleged facts and circumstances described above, nor can we currently predict the timing of any rulings, trials or other significant events relating to such proceedings. Given these limitations and the inherent difficulty of projecting the outcome of litigated disputes, we are unable to reasonably estimate the possible loss, range of loss or legal costs that are likely to arise out of the pending securities litigation or any future proceedings relating to the above matters at this time. Argo Group has insurance protection that may cover a portion of any potential loss or legal costs, but a settlement above the coverage limits could impact our financial position and results of operations.

Based on all information available to Argo Group at this time, management believes that PXRE’s reserving practices, financial disclosures, public filings and securities offerings in the aftermath of the 2005 hurricanes complied fully with all applicable regulatory and legal requirements. However, if unfavorable outcomes in the Private Placement lawsuit were to occur and result in the payment of substantial damages or fines or criminal penalties, these outcomes could have a material adverse effect on our business, cash flows, and results of operations, financial position and prospects.

Argo Group’s subsidiaries are parties to other legal actions incidental to their business. Based on the opinion of counsel, management believes that the resolution of these matters will not materially affect our financial condition or results of operations.

7.    Income Taxes

We are incorporated under the laws of Bermuda and, under current Bermuda law, are not obligated to pay any taxes in Bermuda based upon income or capital gains. We have received an undertaking from the Supervisor of Insurance in Bermuda pursuant to the provisions of the Exempted Undertakings Tax Protection Amendment Act, 2011, which exempts us from any Bermuda taxes computed on profits, income or any capital asset, gain or appreciation, or any tax in the nature of estate duty or inheritance tax, at least until the year 2035.

We do not consider ourselves to be engaged in a trade or business in the United States or the United Kingdom and, accordingly, do not expect to be subject to direct United States or United Kingdom income taxation.

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We have subsidiaries based in the United Kingdom that are subject to the tax laws of that country. Under current law, these subsidiaries are taxed at the applicable corporate tax rates. Six of the United Kingdom subsidiaries are deemed to be engaged in business in the United States and are therefore subject to United States corporate tax in respect of a proportion of their United States underwriting business only. Relief is available against the United Kingdom tax liabilities in respect of overseas taxes paid that arise from the underwriting business. Corporate income tax losses incurred in the United Kingdom can be carried forward, for application against future income, indefinitely. Our United Kingdom subsidiaries file separate United Kingdom income tax returns.

We have subsidiaries based in the United States that are subject to the tax laws of that country. Under current law, these subsidiaries are taxed at the applicable corporate tax rates. Our United States subsidiaries file a consolidated United States federal income tax return.

We also have operations in Belgium, Switzerland, Brazil, France and Ireland, which also are subject to income taxes imposed by the jurisdiction in which they operate. We have operations in the United Arab Emirates, which are not subject to income tax under the laws of that country.

Our income tax provision includes the following components:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Current tax provision	$	2.6		$	12.9		$	3.0		$	31.9
Deferred tax provision (benefit) related to:
Future tax deductions		3.6			(4.3	)		10.3			(4.0	)
Valuation allowance change		(0.2	)		(0.2	)		(0.7	)		(0.7	)
Income tax provision	$	6.0		$	8.4		$	12.6		$	27.2

Our expected income tax provision computed on pre-tax income (loss) at the weighted average tax rate has been calculated as the sum of the pre-tax income (loss) in each jurisdiction multiplied by that jurisdiction’s applicable statutory tax rate.

A reconciliation of the difference between the provision for income taxes and the expected tax provision at the weighted average tax rate for the three and nine months ended September 30, 2011 and 2010 is as follows:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Income tax provision at expected rate	$	6.7		$	9.3		$	16.5		$	33.5
Tax effect of:
Tax-exempt interest		(1.4	)		(1.4	)		(4.3	)		(4.6	)
Dividends received deduction		(0.1	)		(0.4	)		(1.2	)		(1.1	)
Valuation allowance change		(0.2	)		(0.2	)		(0.7	)		(0.7	)
Other permanent adjustments, net		0.8			1.0			1.7			1.1
Adjustment for 2009 tax return		0.0			1.3			0.0			1.3
Adjustment for annualized rate		0.9			0.1			(0.1	)		(0.7	)
United States state tax expense (benefit)		0.1			0.3			(0.3	)		0.2
Prior year foreign taxes recovered		(0.3	)		0.0			(0.3	)		0.0
Deferred tax rate reduction		(0.1	)		0.0			(0.1	)		0.0
Other foreign adjustments		0.0			0.1			0.0			0.2
Foreign exchange adjustments		(0.4	)		(1.7	)		1.4			(2.0	)
Income tax provision	$	6.0		$	8.4		$	12.6		$	27.2

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Our net deferred tax assets (liabilities) are supported by taxes paid in previous periods, the reversal of the taxable temporary differences and the recognition of future income. Management regularly evaluates the recoverability of the deferred tax assets and makes any necessary adjustments to them based upon any changes in management’s expectations of future taxable income. Realization of deferred tax assets is dependent upon our generation of sufficient taxable income in the future to recover tax benefits that cannot be recovered from taxes paid in the carryback period, which is generally two years for net operating losses and three years for capital losses. At September 30, 2011, we had a total net deferred tax asset of $39.2 million prior to any valuation allowance. Management has concluded that a valuation allowance is required for a portion of the tax effected net capital loss carryforward of $31.9 million generated from the sale of PXRE Reinsurance Company, and a full valuation allowance is required for the tax effected net operating loss carryforward of $18.7 million from PXRE Corporation. Of the PXRE loss carryforwards, $17.2 million will expire if not utilized by December 31, 2025 and $1.5 million will expire if not utilized by December 31, 2027. The valuation allowances have been established as Internal Revenue Code Section 382 limits the utilization of net operating loss and net capital loss carryforwards following an ownership change. Accordingly, a valuation allowance of $48.6 million is required. The loss carryforwards available to utilize per year are $2.8 million as required by Internal Revenue Code Section 382. For the nine months ended September 30, 2011, the valuation allowance included in “Deferred tax liabilities, net” in the Consolidated Balance Sheet was reduced by $0.7 million pertaining to the utilization of the PXRE loss carryforwards and was increased by $0.7 million pertaining to the Brazil operations.

We have no material unrecognized tax benefits as of September 30, 2011. Tax years ended December 31, 2007 through December 31, 2010, as related to our United States subsidiaries, are open for examination by the Internal Revenue Service. Tax years ended December 31, 2008 through December 31, 2010 are open for examination by Her Majesty’s Revenue and Customs in respect to our United Kingdom entities.

8. Equity-based Compensation

The fair value method of accounting is used for equity-based compensation plans. Under the fair value method, compensation cost is measured based on the fair value of the award at the measurement date and recognized over the requisite service period. We use the Black-Scholes model to estimate the fair values on the measurement date for share options and share appreciation rights (“SARs”). The Black-Scholes model uses several assumptions to value a share award. The volatility assumption is based on the historical change in Argo Group’s stock price over the previous five years preceding the measurement date. The risk-free rate of return assumption is based on the five-year U.S. Treasury constant maturity rate on the measurement date. The expected award life is based upon the average holding period over the history of the incentive plan. The following table summarizes the assumptions we used for the nine months ended September 30, 2011 and 2010:

	2011	2010
Risk-free rate of return	0.89% to 2.07%	1.34% to 2.65%
Expected dividend yields	1.37% to 1.54%	1.55% to 1.65%
Expected award life (years)	5.04 to 5.07	1.00 to 5.06
Expected volatility	32.1% to 32.5%	31.3% to 31.8%

Argo Group’s 2007 Long-Term Incentive Plan

In November 2007, the shareholders of Argo Group approved the 2007 Long-Term Incentive Plan (the “2007 Plan”), which provides for an aggregate of 4.5 million shares of our common stock that may be issued to certain executives and other key employees. The share awards may be in the form of share options, SARs, restricted shares, restricted share units, performance units, performance shares or other share-based incentive awards. Shares issued under this plan may be shares that are authorized and unissued or shares that we reacquired, including shares purchased on the open market. Share options and SARs will count as one share for the purposes of the limits under the 2007 Plan;

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restricted shares, restricted share units, performance units, performance shares or other share-based incentive awards which settle in common shares will count as 2.75 shares for purpose of the limits under the 2007 Plan.

Share options may be in the form of incentive share options, non-qualified share options and restorative options. Share options are required to have an exercise price that is not less than the market value on the date of grant. We are prohibited from repricing the options. The term of the share options cannot exceed seven years from the grant date.

A summary of option activity under the 2007 Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		447,603		$	36.28
Granted		84		$	39.19
Exercised		(3,104	)	$	35.23
Expired or forfeited		(31,504	)	$	36.96
Outstanding at September 30, 2011		413,079		$	36.69

Options outstanding under this plan vest over a one to five year period, subject to continued employment. Expense recognized under this plan for share options was $0.9 million for each of the nine months ended September 30, 2011 and 2010. Compensation expense from all equity-based compensation awards is included in “Underwriting, acquisition and insurance expense” in the accompanying Consolidated Statements of (Loss) Income. For the nine months ended September 30, 2011, cash payments received related to the settlement of options exercised under the 2007 Plan (net of any related tax payments) were not significant. Unamortized expense for these options was $0.8 million as of September 30, 2011.

A summary of restricted share activity under the 2007 Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Grant Date Fair Value
Outstanding at January 1, 2011		102,243		$	30.11
Granted		91,775		$	32.53
Vested and issued		(29,124	)	$	32.81
Expired or forfeited		(17,557	)	$	31.80
Outstanding at September 30, 2011		147,337		$	31.94

The restricted shares will vest over three to five years. Expense recognized under this plan for the restricted shares was $1.1 million and $0.9 million for the nine months ended September 30, 2011 and 2010, respectively. As of September 30, 2011, there was $3.8 million of total unrecognized compensation cost related to restricted shares.

A summary of stock-settled SARs activity under the 2007 Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		630,947		$	28.22
Granted		403,518		$	32.50
Exercised		(13,397	)	$	28.38
Expired or forfeited		(162,560	)	$	28.74
Outstanding at September 30, 2011		858,508		$	30.13

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The stock-settled SARs vest over a two to five year period. Upon exercise of the stock-settled SARs, the employee is entitled to receive shares of Argo Group’s common stock equal to the appreciation of the stock as compared to the exercise price. Expense recognized for the stock-settled SARs was $1.0 million and $1.2 million for the nine months ended September 30, 2011 and 2010, respectively. As of September 30, 2011, there was $4.7 million of total unrecognized compensation cost related to stock-settled SARs.

A summary of cash-settled SARs activity under the 2007 Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		659,224		$	28.25
Granted		563,709		$	32.48
Exercised		(20,339	)	$	28.07
Expired or forfeited		(127,659	)	$	29.12
Outstanding at September 30, 2011		1,074,935		$	30.37

The cash-settled SARs vest over a two to four year period. Upon exercise of the cash-settled SARs, the employee is entitled to receive cash payment for the appreciation in the value of our common stock over the exercise price. We are accounting for the cash-settled SARs as liability awards, which require the awards to be re-valued at each reporting period. Due to the decline in our stock price from December 31, 2010 to September 30, 2011, the revaluation of the cash-settled SARs resulted in a $1.3 million reduction to expense. Expense recognized for the cash-settled SARs totaled $1.9 million for the nine months ended September 30, 2010. As of September 30, 2011, there was $3.0 million of total unrecognized compensation cost related to cash-settled SARs.

Argo Group’s 2008 Deferred Compensation Plan for Non-Employee Directors

In February 2008, the Board of Directors approved the Argo Group International Holdings, Ltd. Deferred Compensation Plan for Non-Employee Directors, a non-funded and non-qualified deferred compensation plan. Under the Plan, non-employee directors can elect each year to defer payment of 50% or 100% of their cash compensation payable during the next calendar year. During the time that the cash compensation amounts are deferred, such amounts are credited with interest earned at a rate two (2) percent above the prime rate, to be re-set each May 1. In addition, the Plan calls for us to grant a match equal to 75% of the cash compensation amounts deferred in the form of “Stock Units,” which provide directors with the economic equivalent of stock ownership and are credited as a bookkeeping entry to each director’s “Stock Unit Account.” Each Stock Unit is valued at the closing price of our common stock on the national exchange on which it is listed as of the date credited for all purposes under the Plan and fluctuates daily thereafter on that same basis. Distributions from the Plan will occur six months after the non-employee director ceases to be a member of the Board due to retirement or termination without cause or change in control, or immediately upon disability or death. The non-employee directors are responsible for all tax requirements on the deferred compensation and any related earnings. The Plan provides for a Stock Unit Account to be established for each non-employee director upon their election to the Board and credits their account with an initial bookkeeping entry for 1,650 Stock Units. Under this plan, we recorded compensation expense of $0.4 million and $0.6 million for the nine months ended September 30, 2011 and 2010, respectively.

Argonaut Group’s Share-Based Payment Plans

Argonaut Group, Inc.’s Amended and Restated Stock Incentive Plan, as approved by the shareholders (the “Amended Plan”), provided for an aggregate of up to 6,250,000 shares of our common stock that may be issued to certain executives and other key employees. The stock awards were issued in the form of non-qualified stock options and non-vested stock.

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A summary of option activity under the Amended Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		459,434		$	36.80
Granted		0		$	0.00
Exercised		(9,808	)	$	29.25
Expired or forfeited		(34,093	)	$	49.17
Outstanding at September 30, 2011		415,533		$	35.97

The compensation expense recorded for options outstanding was $0.2 million and $0.4 million for the nine months ended September 30, 2011 and 2010, respectively. For the nine months ended September 30, 2011, we received cash payments of $0.3 million (net of any related tax payments) related to the settlement of options exercised under the Amended Plan. The options granted under the Amended Plan were fully vested in August 2011.

9. Reserves for Losses and Loss Adjustment Expenses

The following table provides a reconciliation of reserves for losses and loss adjustment expenses (“LAE”), net of reinsurance, to the gross amounts reported in the Consolidated Balance Sheets. Reinsurance recoverables in this note exclude paid loss recoverables of $147.7 million and $241.0 million as of September 30, 2011 and 2010, respectively:

	For the Nine Months Ended September 30,
(in millions)	2011		2010
Net beginning of the year	$	2,253.0	$	2,213.2
Add:
Losses and LAE incurred during current calendar year, net of reinsurance:
Current accident year		662.8		631.7
Prior accident years		1.6		(26.8	)
Losses and LAE incurred during calendar year, net of reinsurance		664.4		604.9
Deduct:
Losses and LAE payments made during current calendar year, net of reinsurance:
Current accident year		153.2		129.3
Prior accident years		417.1		445.6
Losses and LAE payments made during current calendar year, net of reinsurance:		570.3		574.9
Additional participation interest (1)		31.2		44.6
Foreign exchange adjustments		12.0		(11.9	)
Net reserves - end of period		2,390.3		2,275.9
Add:
Reinsurance recoverable on unpaid losses and LAE, end of period		959.3		954.3
Gross reserves - end of period	$	3,349.6	$	3,230.2

⁽¹⁾  Amount represents additional reserves due to increased syndicate participation.

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Included in losses and LAE for the nine months ended September 30, 2011 was $1.6 million in unfavorable prior years’ loss reserve development comprised of the following: $17.8 million of favorable development in the Excess and Surplus Lines segment resulting from $13.2 million of favorable development in the general and products liability lines of business, $3.4 million of favorable development in the automobile liability lines of business and $1.2 million of favorable development primarily in the professional liability and property lines of business; $4.7 million of net unfavorable development in the Commercial Specialty segment primarily driven by $12.1 million of unfavorable development in general liability due primarily to increases in claim severity, partially offset by $4.1 million of favorable development in workers compensation and $3.7 million of favorable development in an assumed Directors and Officers program; $3.6 million of net favorable development in the International Specialty segment (formerly the Reinsurance segment) comprised of $3.9 million of favorable development attributable to short-tail non-catastrophe losses, $1.1 million of favorable development related to 2005 Hurricanes Ike and Gustav, partially offset by $1.4 million of unfavorable development attributable to the 2010 New Zealand earthquake; $14.8 million of unfavorable development in the Syndicate 1200 segment (formerly the International Specialty segment) primarily attributable to $10.1 million of unfavorable development in the liability lines of business driven by deterioration in the professional indemnity and general liability classes of business related to a small number of specific claims and a reduction in the estimate of future reinsurance recoveries, coupled with $4.6 million of unfavorable development related to property lines of business where the claims experience was worse than expected; and $3.5 million of net unfavorable development in the Run-off Lines segment primarily due to $11.7 million of unfavorable development in asbestos and environmental lines, partially offset by the collection of a contribution settlement from another insurer for a California workers compensation indemnity claim, and favorable development in other lines. The asbestos and environmental unfavorable development is primarily attributable to $8.2 million for asbestos losses driven by increasing severities, defense costs and the settlement of a disputed reinsurance recoverable matter, and $3.5 million for environmental losses driven by one significant enviromental loss.

Included in losses and LAE for the nine months ended September 30, 2010 was $26.8 million in favorable prior years’ loss reserve development comprised of the following: $9.3 million of net favorable development in the Excess and Surplus Lines segment resulting from $9.5 million of favorable development related to casualty and professional liability lines of business partially offset by $0.2 million of unfavorable development related to property lines of business; $5.4 million of net favorable development in the Commercial Specialty segment resulting from favorable development primarily in workers compensation and property lines of business partially offset by unfavorable development in liabilty lines of business; $14.5 million of favorable development in the International Specialty segment (formerly the Reinsurance segment) comprising $12.2 million attributable to short-tail non-catastrophe losses, $1.1 million attributable to 2005 Hurricanes Ike and Gustav, and $1.2 million related to other assumed programs; $2.7 million of net unfavorable development in the Syndicate 1200 segment (formerly the International Specialty segment) attributable to $11.6 million unfavorable development related to liability lines of business partially offset by $8.9 million favorable development related to property lines of business; and $0.3 million of net favorable development in the Run-off Lines segment due to $8.2 million of favorable development related to risk management run-off reserves and $1.6 million of favorable development on legacy PXRE claims, partially offset by $9.5 million of unfavorable development in asbestos and environmental lines.

In the opinion of management, our reserves represent the best estimate of our ultimate liabilities, based on currently known facts, current law, current technology and assumptions considered reasonable where facts are not known. Due to the significant uncertainties and related management judgments, there can be no assurance that future loss development, favorable or unfavorable, will not occur.

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10. Underwriting, Acquisition and Insurance Expenses

Underwriting, acquisition and insurance expenses for the three and nine months ended September 30, 2011 and 2010 were as follows:

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
(in millions)	2011			2010		2011		2010
Commissions	$	49.0		$	46.6	$	143.1	$	163.3
General expenses		51.0			58.1		153.1		158.7
Premium taxes, boards and bureaus		8.0			6.9		19.7		19.5
		108.0			111.6		315.9		341.5
Net (deferral) amortization of policy acquisition costs		(1.7	)		4.2		0.0		19.2
Total underwriting, acquisition and insurance expenses	$	106.3		$	115.8	$	315.9	$	360.7

Included in general expenses for the nine months ended September 30, 2011 is $4.0 million of expense related to the write-off of certain uncollectible balances in reinsurance recoverables on paid losses. Partially offsetting these expenses were a recovery of $0.9 million for reinsurance recoverable amounts previously written off and a net reversal of $0.9 million to adjust the allowances for doubtful accounts on premiums receivable and reinsurance recoverables on paid losses.

Included in general expenses for the three and nine months ended September 30, 2010 was $2.9 million and $5.0 million, respectively, of bad debt expense due to management increasing the allowance for reinsurance recoverable balances in the first and third quarter of 2010.

11. Segment Information

We are primarily engaged in writing property and casualty insurance and reinsurance. We have four ongoing reporting segments: Excess and Surplus Lines, Commercial Specialty, International Specialty (formerly Reinsurance) and Syndicate 1200 (formerly International Specialty). Additionally, we have a Run-off Lines segment for certain products that we no longer write. See Note 1, “Basis of Presentation,” for additional information on the changes of the segment names.

As a result of a group reinsurance coverage entered into in June 2011 through a catastrophe bond issuance in the Insurance Linked Securities market, for the three and nine months ended September 30, 2011, we have recorded $0 and $16.3 million, respectively, in ceded written premium and have recognized $2.7 million and $3.1 million, respectively, in ceded earned premiums in the Corporate and Other segment.

We consider many factors, including the nature of each segment’s insurance and reinsurance products, production sources, distribution strategies and the regulatory environment, in determining how to aggregate reporting segments.

In evaluating the operating performance of our segments, we focus on core underwriting and investing results before the consideration of realized gains or losses from the sales of investments. Realized investment and other gains (losses) are reported as a component of the Corporate and Other segment, as decisions regarding the acquisition and disposal of securities reside with our executive management and are not under the control of the individual business segments. Identifiable assets by segment are those assets used in the operation of each segment.

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Revenue and (loss) income before income taxes for each segment for the three and nine months ended September 30, 2011 and 2010 were as follows:

	For the Three  Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Revenue:
Earned premiums
Excess and Surplus Lines	$	99.4		$	122.2		$	305.6		$	376.0
Commercial Specialty		82.9			81.6			233.7			254.2
International Specialty		21.4			24.8			76.2			74.7
Syndicate 1200		67.3			60.7			188.2			232.2
Run-off Lines		(0.1	)		(0.4	)		0.3			(0.2	)
Corporate and Other		(2.7	)		0.0			(3.1	)		0.0
Total earned premiums		268.2			288.9			800.9			936.9
Net investment income
Excess and Surplus Lines		13.2			14.4			42.4			43.7
Commercial Specialty		6.6			7.2			21.0			22.1
International Specialty		2.6			2.4			8.5			6.4
Syndicate 1200		4.3			3.9			13.3			10.6
Run-off Lines		3.1			4.3			10.4			13.4
Corporate and Other		0.2			1.4			0.7			4.3
Total net investment income		30.0			33.6			96.3			100.5
Fee income, net		1.4			1.7			1.8			2.0
Net realized investment and other gains		3.9			9.1			37.7			28.6
Total revenue	$	303.5		$	333.3		$	936.7		$	1,068.0
	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
(Loss) income before income taxes
Excess and Surplus Lines	$	19.5		$	15.3		$	40.8		$	43.5
Commercial Specialty		(1.6	)		11.9			(8.1	)		17.7
International Specialty		(13.3	)		8.4			(64.6	)		23.0
Syndicate 1200		(4.6	)		0.1			(47.9	)		(12.8	)
Run-off Lines		(5.8	)		(2.0	)		(2.0	)		1.9
Total segment (loss) income before taxes		(5.8	)		33.7			(81.8	)		73.3
Corporate and Other		(4.2	)		(11.4	)		(27.1	)		(4.9	)
Net realized investment and other gains		3.9			9.1			37.7			28.6
Total (loss) income before income taxes	$	(6.1	)	$	31.4		$	(71.2	)	$	97.0

The following table represents identifiable assets as of September 30, 2011 and December 31, 2010:

(in millions)	September 30, 2011		December 31, 2010
Excess and Surplus Lines	$	2,287.4	$	2,340.9
Commercial Specialty		1,271.8		1,300.0
International Specialty		684.3		500.2
Syndicate 1200		1,580.5		1,574.1
Run-off Lines		572.0		639.1
Corporate and Other		106.7		134.2
Total	$	6,502.7	$	6,488.5

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Included in the Syndicate 1200 segment (formerly the International Specialty segment) at September 30, 2011 and December 31, 2010 are $530.5 million and $651.8 million, respectively, in assets associated with trade capital providers.

12. Supplemental Cash Flow Information

Income taxes paid. We paid income taxes of $15.3 million and $19.8 million during the nine months ended September 30, 2011 and 2010, respectively.

Income taxes recovered. We recovered income taxes of $0.2 million during the nine months ended September 30, 2011. During the same period in 2010, $2.6 million of income taxes was recovered. This recovery, reflected in “Current income taxes receivable, net,” was applied against our 2010 estimated tax payments.

Interest paid. Interest paid for the nine months ended September 30, was as follows:

	For the Nine Months Ended September 30,
(in millions)	2011		2010
Junior subordinated debentures	$	16.2	$	17.2
Revolving credit facility		0.0		0.1
Other indebtedness		2.8		2.4
Total interest paid	$	19.0	$	19.7

13. Disclosures about Fair Value of Financial Instruments

Cash. The carrying amount approximates fair value.

Investment securities and short-term investments. See Note 3, “Investments,” for additional information.

Premiums receivable and reinsurance recoverables on paid losses. The carrying value of current receivables approximates fair value. At September 30, 2011 and December 31, 2010, the carrying values of premiums receivable over 90 days were $18.6 million and $18.9 million, respectively. Included in “Reinsurance recoverables” in the Consolidated Balance Sheets at September 30, 2011 and December 31, 2010, are amounts that are due from third party trade capital providers associated with the operations of Argo Underwriting Agency Limited (“Argo International”). Upon settlement, the receivable is offset against the liability also reflected in the accompanying Consolidated Balance Sheets. At September 30, 2011 and December 31, 2010, the payable was in excess of the receivable. Of our paid losses on reinsurance recoverable balances, excluding amounts attributable to Argo International’s third party trade capital providers, at September 30, 2011 and December 31, 2010, the carrying values over 90 days were $20.6 million and $28.7 million, respectively. Our methodology for establishing our allowances for doubtful accounts includes specifically identifying all potential uncollectible balances regardless of aging. Any of the over 90 day balances, where collectibility was deemed questionable, have been included in the allowances. At September 30, 2011 and December 31, 2010, the allowance for doubtful accounts for premiums receivable was $2.9 million and $4.6 million, respectively, and the allowance for doubtful accounts for reinsurance recoverables on paid losses was $3.1 million and $11.1 million, respectively. Premiums receivable over 90 days were secured by collateral in the amount of $0.2 million and $0.4 million at September 30, 2011 and December 31, 2010, respectively. Reinsurance recoverables on paid losses over 90 days were secured by collateral in the amount of $0.2 million and $0.4 million at September 30, 2011 and December 31, 2010, respectively.

Long-term debt. At September 30, 2011 and December 31, 2010, the fair value of our Junior Subordinated Debentures was estimated using quoted prices from external sources based on current market conditions.

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Other indebtedness. At September 30, 2011 and December 31, 2010, the fair value of our Other Indebtedness was estimated using quoted prices from external sources based on current market conditions.

A summary of our financial instruments whose carrying value did not equal fair value at September 30, 2011 and December 31, 2010 is shown below:

	September 30, 2011				December 31, 2010
(in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Junior subordinated debentures	$	311.5	$	250.0	$	311.5	$	238.6
Other indebtedness:
Floating rate loan stock		66.1		48.0		64.2		44.3
Note payable		0.8		0.6		0.8		0.5
	$	378.4	$	298.6	$	376.5	$	283.4

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following is a discussion and analysis of our results of operations for the three and nine months ended September 30, 2011 compared with the three and nine months ended September 30, 2010, and also a discussion of our financial condition as of September 30, 2011. This discussion and analysis should be read in conjunction with the attached unaudited interim Consolidated Financial Statements and notes thereto and Argo Group’s Annual Report on Form 10-K for the year ended December 31, 2010 filed with the Securities and Exchange Commission on February 28, 2011, including the audited Consolidated Financial Statements and notes thereto.

Forward Looking Statements

Management’s Discussion and Analysis of Financial Condition and Results of Operations, Quantitative and Qualitative Disclosures About Market Risk and the accompanying Consolidated Financial Statements (including the notes thereto) may contain “forward looking statements,” which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The forward looking statements are based on our current expectations and beliefs concerning future developments and their potential effects on us. There can be no assurance that actual developments will be those anticipated by us. Actual results may differ materially as a result of significant risks and uncertainties, including non-receipt of expected payments, the capital markets and their effect on investment income and the fair value of the investment portfolio, development of claims and the effect on loss reserves, accuracy in estimating loss reserves, changes in the demand for our products, the effect of general economic conditions, adverse state and federal legislation and regulations, government investigations into industry practices, developments relating to existing agreements, heightened competition, changes in pricing environments and changes in asset valuations. For a more detailed discussion of risks and uncertainties, see our public filings made with the Securities and Exchange Commission. We undertake no obligation to publicly update any forward-looking statements.

Generally, it is our policy to communicate events that may have a material adverse impact on our operations or financial position, including property and casualty catastrophic events and material losses in the investment portfolio, in a timely manner through a public announcement. It is also our policy not to make public announcements regarding events that are believed to have no material adverse impact on our results of operations or financial position based on management’s current estimates and available information, other than through regularly scheduled calls, press releases or filings.

Results of Operations

The following is a comparison of selected data from our operations:

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Gross written premiums	$	448.5		$	398.3		$	1,203.0		$	1,238.1
Earned premiums	$	268.2		$	288.9		$	800.9		$	936.9
Net investment income		30.0			33.6			96.3			100.5
Fee income, net		1.4			1.7			1.8			2.0
Net realized investment and other gains		3.9			9.1			37.7			28.6
Total revenue	$	303.5		$	333.3		$	936.7		$	1,068.0
(Loss) income before income taxes	$	(6.1	)	$	31.4		$	(71.2	)		97.0
Provision for income taxes		6.0			8.4			12.6			27.2
Net (loss) income	$	(12.1	)	$	23.0		$	(83.8	)	$	69.8
Loss ratio		74.5	%		61.2	%		83.0	%		64.6	%
Expense ratio		39.6	%		40.1	%		39.4	%		38.5	%
Combined ratio		114.1	%		101.3	%		122.4	%		103.1	%

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The increase in gross written premiums for the three months ended September 30, 2011 as compared to the same period in 2010 was primarily attributable to increased premium writings in our Syndicate 1200 segment, which introduced new programs in 2011. The decline in consolidated earned premiums for the three and nine months ended September 30, 2011 as compared to the same periods in 2010 was primarily due to continued competition, declining rates, the discontinued writing of certain programs and the revision of the underwriting guidelines in the Commercial Specialty and the Syndicate 1200 segments that were implemented in the fourth quarter of 2010.

Consolidated net investment income decreased for the three and nine months ended September 30, 2011 as compared to the same periods in 2010 due to a decline in the average investment assets balances for the periods in 2011 as compared to 2010. Total invested assets at September 30, 2011 and 2010 were $4,009.6 million and $4,161.5 million, respectively, net of $170.7 million and $179.1 million of invested assets attributable to the Syndicate 1200 segment’s trade capital providers.

The decline in net realized investment and other gains for the three months ended September 30, 2011 as compared to the same period in 2010 was primarily attributable to increased gain recognized in 2010 due to selling selected securities in order to reposition the portfolio into higher yielding assets. The increase in net realized investment and other gains for the nine months ended September 30, 2011 as compared to the same period in 2010 was primarily attributable to $9.6 million in realized gains from the sale of an equity holding during the second quarter of 2011 that had a minimal cost basis.

We have purchased foreign currency 90 day forward contracts to manage currency exposure on losses related to the New Zealand and Japan earthquakes and Australian floods. The term of these contracts gives us flexibility to adjust the notional amount of the contracts based on payments made and changes in estimates of future losses. We do not apply hedge accounting to these contracts, and as a result, all gains (losses) are recognized in net realized investment and other gains. For the three months ended September 30, 2011 we recognized $3.6 million in foreign currency exchange losses related to the loss reserves recorded for these events and an additional $1.1 million in realized losses from the currency forward contracts. For the nine months ended September 30, 2011 we recognized $6.1 million in foreign currency exchange losses related to the loss reserves recorded for these events which were offset by $2.8 million in realized gains from the currency forward contracts. The difference between the foreign currency exchange loss on the loss reserves and the forward contracts is due to the change in foreign currency rates from the date of loss versus the date the forward contracts were executed, as well as a timing difference in the valuation of the loss reserves as compared to the forward contracts. The foreign currency exchange (gains) losses related to these loss reserves and the realized gains (losses) from the currency forward contracts are reported under the Corporate and Other segment.

Consolidated losses and loss adjustment expenses were $199.6 million and $176.9 million for the three months ended September 30, 2011 and 2010, respectively. Included in losses and loss adjustment expenses for the three months ended September 30, 2011 was $26.4 million in catastrophe losses primarily resulting from Hurricane Irene and the Danish Cloudburst, aggregate reinsurance covers losses of $9.3 million and an increase in previously estimated losses from the New Zealand earthquake, which occurred in the first quarter of 2011. Partially offsetting these losses was $2.0 million in net favorable loss reserve development on prior accident years. Net favorable development in the workers compensation and commercial automobile lines were partially offset by net unfavorable development in the general liability lines due to the strengthening of loss reserves for run-off asbestos and environmental claims, coupled with net unfavorable development on the international property business. Included in losses and loss adjustment expenses for the three months ended September 30, 2010 was $12.9 million in catastrophe losses for the 2010 accident year, driven primarily by $11.3 million in losses resulting from the New Zealand earthquake which occurred in the third quarter of 2010. Partially offsetting these losses for 2010 was $6.5 million in net favorable loss reserve development on prior accident years. Included in the net favorable development was $15.6 million of favorable development primarily attributable to the run-off workers compensation products. Partially offsetting this favorable development was unfavorable development in the general liability lines, primarily attributable to $9.5 million in reserve strengthening of our run-off asbestos and environmental reserves for claims incurred many years ago.

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Consolidated losses and loss adjustment expenses were $664.4 million and $604.9 million for the nine months ended September 30, 2011 and 2010, respectively. Included in losses and loss adjustment expenses for the nine months ended September 30, 2011 was $170.6 million in catastrophe losses primarily attributable to the New Zealand and Japan earthquakes, windstorms and tornados, including Hurricane Irene, in the United States, Australian floods and the Danish Cloudburst, coupled with $9.3 million in losses under aggregate reinsurance covers. Also included in losses and loss adjustment expenses was $1.6 million in net unfavorable loss reserve development on prior accident years. Included in losses and loss adjustment expenses for the nine months ended September 30, 2010 was $62.5 million resulting from storms in the United States, Chile, Haiti and New Zealand earthquakes and the Deepwater Horizon incident, partially offset by $26.8 million in net favorable loss reserve development on prior accident years. The following table summarizes the reserve development as respects to prior year loss reserves by line of business for the nine months ended September 30, 2011:

(in millions)	2010 Net Reserves		Net Reserve Development (Favorable)/ Unfavorable			Percent of 2010 Net Reserves
General liability	$	990.2	$	1.3			0.1	%
Workers compensation		414.7		(14.8	)		-3.6	%
Commercial multi-peril		183.9		7.3			4.0	%
Commercial auto liability		159.2		(4.9	)		-3.1	%
Reinsurance - nonproportional assumed property		87.5		(3.6	)		-4.1	%
Special property		15.9		0.3			1.9	%
Syndicate 1200 property		202.1		4.6			2.3	%
Syndicate 1200 liability		186.7		10.1			5.4	%
All other lines		12.8		1.3			10.2	%
Total	$	2,253.0	$	1.6			0.1	%

In determining appropriate reserve levels for the nine months ended September 30, 2011, we maintained the same general processes and disciplines that were used to set reserves at prior reporting dates. No significant changes in methodologies were made to estimate the reserves since the last reporting date; however, at each reporting date we reassess the actuarial estimate of the reserve for losses and loss adjustment expenses and record our best estimate. Consistent with prior reserve valuations, as claims data becomes more mature for prior accident years, actuarial estimates were refined to weigh certain actuarial methods more heavily in order to respond to any emerging trends in the paid and reported loss data. These modifications to the analysis varied depending on whether the line of business was short-tailed or long-tailed and also varied by accident year. While prior accident years’ net reserves for losses and loss adjustment expenses for some lines of business have developed favorably in recent years, this does not infer that more recent accident years’ reserves also will develop favorably; pricing, reinsurance costs, the legal environment, general economic conditions including changes in inflation and many other factors impact our ultimate loss estimates. Since accident year 2007, pricing for our products has been under significant competition and management’s expectation is that profitability for certain lines of business decreased accordingly yet loss costs have not decreased proportionately.

When determining reserve levels, we recognize that there are several factors that present challenges and uncertainties to the estimation of loss reserves. The estimated losses related to the Japan earthquake and tsunami, the Christchurch, New Zealand earthquake, Australian flooding and United States storms occurring during the nine months ended September 30, 2011 are based on information currently available from portfolio modeling and assessments of the exposures insured under individual policies and industry loss estimates. Due to the preliminary nature of the information used to determine the estimated losses and the uncertainties surrounding the industry loss estimates, the ultimate cost to the Company from these events may differ materially from the current estimate. Other examples of these uncertainties impacting the estimation of loss reserves include growth in loss reserves over the last several years in both the Excess and Surplus Lines and Commercial Specialty segments, changes to the reinsurance structure and

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potential increases in inflation. Our net retained losses vary by product and they have generally increased over time. To properly recognize these uncertainties, actuarial reviews have given significant consideration to the paid and incurred Bornhuetter-Ferguson (“BF”) methodologies. Compared with other actuarial methodologies, the paid and incurred BF methods assign smaller weight to actual reported loss experience, with the greatest weight assigned to an expected or planned loss ratio. The expected or planned loss ratio has typically been determined using various assumptions pertaining to prospective loss frequency and loss severity. In setting reserves at September 30, 2011, we continued to consider the paid and incurred BF methods for recent years.

Our loss reserve estimates gradually blend in the results from development and frequency/severity methodologies over time. For general liability estimates, more credibility is assigned to our own loss experience approximately 60 to 72 months after the beginning of an accident year. For property business, our loss reserve estimates also blend in the results from development and frequency/severity methodologies over time. For property lines, in contrast to general liability estimates, full credibility is assigned to our loss experience approximately 24 to 36 months after the beginning of an accident year, where loss reporting and claims closing patterns settle more quickly. Our loss experience receives partial weighting in the estimates 12 to 24 months after the beginning of the accident year.

Consolidated loss reserves were $3,349.6 million (including $197.9 million of reserves attributable to the Syndicate 1200 segment’s trade capital providers), and $3,230.2 million (including $183.8 million of reserves attributable to the Syndicate 1200 segment’s trade capital providers), as of September 30, 2011 and 2010, respectively. Management has recorded its best estimate of loss reserves as of September 30, 2011 based on current known facts and circumstances. Due to the significant uncertainties inherent in the estimation of loss reserves, there can be no assurance that future loss development, favorable or unfavorable, will not occur.

Consolidated underwriting, insurance and acquisition expenses were $106.3 million and $115.8 million for the three months ended September 30, 2011 and 2010, respectively. The decline in the dollar value of the expense was due to the reduction of fixed costs due to the declining premium volumes. The decline in the expense ratio for the three months ended September 30, 2011 as compared to the same period in 2010 was attributable to a focus on cost reduction in light of continued declining premium volumes. Consolidated underwriting, insurance and acquisition expenses were $315.9 million and $360.7 million for the nine months ended September 30, 2011 and 2010, respectively. The increase in the expense ratio for the nine months ended September 30, 2011 as compared to the same period in 2010 was due to fixed expenses declining at a slower rate than earned premiums.

Consolidated interest expense was $5.6 million and $16.5 million for the three and nine months ended September 30, 2011 compared to $5.8 million and $17.3 million for the same periods in 2010. The decline in consolidated interest expense was due to reduced interest rates in 2011 as compared to 2010.

Consolidated foreign currency exchange resulted in a $3.4 million loss for the three months ended September 30, 2010 and a $1.9 million gain for the same period in 2011. The change in the foreign currency exchange gain (loss) was primarily attributable to the weighted average non-US Dollar currencies weakening against the US Dollar during the third quarter of 2011. For the three months ended September 30, 2010, the non US Dollar currencies strengthened against the US Dollar. Consolidated foreign currency exchange resulted in a $11.9 million gain for the nine months ended September 30, 2010 and a $11.1 million loss for the same period in 2011. For the nine months ended September 30, 2011, non US Dollar currencies strengthened against the US Dollar, excluding British Sterling which was flat, resulting in the foreign currency exchange loss. By comparison, for the nine months ended September 30, 2010, non US Dollar currencies weakened considerably against the US Dollar, resulting in the foreign currency exchange gain.

The consolidated provision for income taxes was $6.0 million and $12.6 million for the three and nine months ended September 30, 2011 compared to $8.4 million and $27.2 million for the same periods ended 2010. The consolidated income tax provision represents the income tax expense associated with our operations based on the tax laws of the jurisdictions in which they operate. Therefore, the consolidated provision (benefit) for income taxes represents taxes

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on net income (loss) for our United States, United Kingdom, Belgium, Brazil, Ireland and Switzerland operations. For the three months ended September 30, 2011, our operations in the United Kingdom and United States generated taxable income which resulted in the tax expense for the consolidated group. For the nine months ended September 30, 2011, the tax provision generated by our operations based in the United States was partially offset by tax benefits for our operations based in the United Kingdom.

Segment Results

We are primarily engaged in writing property and casualty insurance and reinsurance. We have four ongoing reporting segments: Excess and Surplus Lines, Commercial Specialty, International Specialty (formerly Reinsurance) and Syndicate 1200 (formerly International Specialty). Additionally, we have a Run-off Lines segment for products that we no longer underwrite.

During the first quarter of 2011, we evaluated the current operating structure of our Bermuda and London-based business segments, in conjunction with management changes impacting these operations. To more appropriately align our operating structure with the management changes, we concluded that operating activities associated with our London operations (our former International Specialty segment) will be principally managed and evaluated as a Lloyd’s market syndicate business, while our Bermuda operations (our former Reinsurance segment) will serve as the center for our international insurance and reinsurance business, including our product development and global strategic expansion initiatives. These changes resulted in our Bermuda operations now being identified as our International Specialty segment. Our London based operation will be focused on the management and growth of our Lloyd’s syndicate operations and this segment is now known as Syndicate 1200.

In evaluating the operating performance of our segments, we focus on core underwriting and investing results before consideration of realized gains or losses from the sales of investments. Management excludes realized investment and other gains and losses from segment results, as decisions regarding the sales of investments are made at the corporate level. Although this measure of profit (loss) does not replace net income (loss) computed in accordance with GAAP as a measure of profitability, management utilizes this measure of profit (loss) to focus its reporting segments on generating operating income.

Since we generally manage and monitor the investment portfolio and indebtedness on an aggregate basis, the overall performance of the investment portfolio, including the related net investment income and interest expense, are discussed above on a consolidated basis under consolidated net investment income and consolidated interest expense rather than within or by segment. We allocate net investment income and interest expense to each segment based on their allocated capital and reserves, while taking into consideration the anticipated duration of these reserves.

Excess and Surplus Lines. The following table summarizes the results of operations for the Excess and Surplus Lines segment for the three and nine months ended September 30, 2011 and 2010:

	Three Months  Ended September 30,						Nine Months  Ended September 30,
(in millions)	2011			2010			2011			2010
Gross written premiums	$	116.5		$	132.7		$	355.8		$	403.6
Earned premiums	$	99.4		$	122.2		$	305.6		$	376.0
Losses and loss adjustment expenses		54.6			78.5			194.5			243.1
Underwriting, acquisition and insurance expenses		36.5			41.2			106.7			128.2
Underwriting income		8.3			2.5			4.4			4.7
Net investment income		13.2			14.4			42.4			43.7
Interest expense		(2.0	)		(1.6	)		(6.0	)		(4.9	)
Income before income taxes	$	19.5		$	15.3		$	40.8		$	43.5
Loss ratio		55.1	%		64.3	%		63.7	%		64.6	%
Expense ratio		36.7	%		33.7	%		34.9	%		34.1	%
Combined ratio		91.8	%		98.0	%		98.6	%		98.7	%

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The declines in gross written and earned premiums were primarily due to market conditions. The excess and surplus lines marketplace continues to experience increased competition from both other excess and surplus lines carriers as well as the standard markets, which has led to lower rates and business shifting to the standard markets. Competition within the excess and surplus lines marketplace remains intense, resulting in continued downward pressure on average rate per exposure and the current economic conditions are forcing insureds to reduce coverage or in some cases, curtail or cease operations. In addition, insureds in this segment are often the result of new business formations, which have been limited due to the current economic environment. The Excess and Surplus Lines segment has experienced a shift in both product and policyholder mix, resulting in reduced premium writings.

Included in the loss ratio for the three months ended September 30, 2011, was $2.2 million of catastrophe losses resulting from storm activity in the United States, including $1.5 million from Hurricane Irene. Offsetting these catastrophe losses was $15.6 million of net favorable loss reserve development on prior accident years. This favorable development was driven by $12.3 million of favorable development in our general and products liability lines, primarily in accident years 2005 through 2008, resulting from better than expected claim severity. The remaining favorable development is primarily due to our automobile liability and property lines of business. Included in losses and loss adjustment expenses for the three months ended September 30, 2010 was $1.5 million of favorable loss reserve development on prior accident years in our casualty, professional liability and property lines.

Included in the loss ratio for the nine months ended September 30, 2011, was $7.7 million of catastrophe losses resulting from storm activity in the United States. Offsetting these catastrophe losses was $17.8 million of net favorable loss reserve development on prior accident years, driven by $13.2 million of favorable development in our general and products liability lines and $3.4 million of favorable development in our automobile liability. The remaining favorable development was primarily attributable to the professional liability and property lines of business. Included in losses and loss adjustment expense for the nine months ended September 30, 2010 was $9.3 million net favorable loss reserve development on prior accident years primarily within the casualty and professional liability lines. Partially offsetting the favorable development was $2.9 million in catastrophe losses for the 2010 accident year due to storms in the United States. Loss reserves were $1,310.4 million and $1,385.3 million at September 30, 2011 and 2010, respectively.

The increase in the expense ratios for the three and nine months ended September 30, 2011 as compared to the same periods in 2010 was primarily attributable to the reductions in earned premiums outpacing the reductions in total underwriting expenses.

Commercial Specialty. The following table summarizes the results of operations for the Commercial Specialty segment for the three and nine months ended September 30, 2011 and 2010:

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Gross written premiums	$	151.9		$	146.3		$	335.1		$	338.2
Earned premiums	$	82.9		$	81.6		$	233.7		$	254.2
Losses and loss adjustment expenses		64.4			50.4			178.6			175.3
Underwriting, acquisition and insurance expenses		26.3			26.0			80.9			81.0
Underwriting (loss) income		(7.8	)		5.2			(25.8	)		(2.1	)
Net investment income		6.6			7.2			21.0			22.1
Interest expense		(1.3	)		(1.0	)		(3.7	)		(3.1	)
Fee income, net		0.9			0.5			0.4			0.8
(Loss) income before income taxes	$	(1.6	)	$	11.9		$	(8.1	)	$	17.7
Loss ratio		77.6	%		61.8	%		76.4	%		69.0	%
Expense ratio		31.8	%		31.8	%		34.6	%		31.9	%
Combined ratio		109.4	%		93.6	%		111.0	%		100.9	%

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The increase in gross written and earned premiums for the three months ended September 30, 2011 as compared to the same periods in 2010 was primarily attributable to our surety and coal mining products. Earned premiums for the surety products increased $1.6 million and the coal mining products increased $1.3 million as compared to the same period in 2010. The increases in earned premiums for the quarter were offset by a decrease in Argo Insurance U.S. Retail. The decrease in gross written and earned premiums for the nine months ended September 30, 2011 as compared to the same period in 2010 was primarily attributable to the discontinued hotel/motel, religious institution, and First Insurance Company of Hawaii programs and underwriting actions in the grocery and restaurant programs within the Argo Insurance U.S. Retail business unit. Earned premiums for Argo Insurance U.S. Retail decreased from $88.5 million for the nine months ended September 30, 2010 to $68.5 million (excludes $2.6 million reinstatement premium) for the same period in 2011.

Included in the loss ratio for the three months ended September 30, 2011, was $7.9 million of catastrophe losses resulting from storm activity in the United States, including $6.0 million from Hurricane Irene. Included in losses and loss adjustment expenses for the three months ended September 30, 2011 was $3.9 million of net unfavorable loss reserve development on prior accident years resulting from $4.8 million of unfavorable development in general liability due primarily to increases in claim severity, partially offset by favorable development in workers compensation, auto liability and property lines. The loss ratio for the three months ended September 30, 2010, included $2.2 million of losses from storm activity in the United States. Included in losses and loss adjustment expenses for the three months ended September 30, 2010 was $1.9 million of net favorable loss reserve development on prior accident years resulting from favorable development in workers compensation lines.

Included in the loss ratio for the nine months ended September 30, 2011, was $19.1 million of catastrophe losses resulting from storm activity in the United States, including $6.0 million from Hurricane Irene and $6.3 million from the Alabama and Joplin tornados. Additionally, for the nine months ended September 30, 2011, we recognized $4.7 million of unfavorable loss development on prior accident years. The unfavorable development was primarily attributable to $12.1 million of unfavorable development in general liability and auto liability lines primarily attributable to increases in claim severity, partially offset by $4.1 million of favorable development in workers compensation and $3.7 million of favorable development in an assumed Directors and Officers program. Included in the loss ratio for the nine months ended September 30, 2010 was total storm activity of $15.5 million. Additionally, for the nine months ended September 30, 2010, we recognized $5.4 million of favorable loss development on prior accident years. The favorable development was driven primarily by favorable development in the workers compensation line of business as well as salvage and subrogation received related to our property lines. This development was partially offset by adverse development in the liability lines. Loss reserves for the Commercial Specialty segment were $622.4 million and $623.1 million as of September 30, 2011 and 2010, respectively.

The expense ratios were comparable at 31.8% for each of the three months ended September 30, 2011 and 2010. The increase in the expense ratio for the nine months ended September 30, 2011 as compared to the same period in 2010 was primarily attributable to lower premium volumes and $4.5 million of reinstatement premium as well as a reduction of contingent commission and policyholder dividend accruals related to 2010 activity.

Net fee income consists of commissions earned by our managing general underwriters for brokerage business placed outside Argo Group minus the expenses associated with generating the commissions. The increase in net fee income for the three months ended September 30, 2011 as compared to the same period in 2010 was primarily attributable to the expansion of a program outside of the New England area. The decline in net fee income for the nine months ended September 30, 2011 as compared to the same period ended 2010 was primarily attributable to reduced contingent commissions being received in 2011 as compared to 2010, coupled with declining revenue on certain programs without a related decline in expenses.

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International Specialty (formerly Reinsurance): The following table summarizes the results of operations for the International Specialty segment for the three and nine months ended September 30, 2011 and 2010:

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Gross written premiums	$	44.9		$	40.2		$	176.0		$	168.0
Earned premiums	$	21.4		$	24.8		$	76.2		$	74.7
Losses and loss adjustment expenses		28.8			11.5			124.7			33.2
Underwriting, acquisition and insurance expenses		7.6			6.4			22.1			22.2
Underwriting (loss) income		(15.0	)		6.9			(70.6	)		19.3
Net investment income		2.6			2.4			8.5			6.4
Interest expense		(0.9	)		(0.9	)		(2.5	)		(2.7	)
(Loss) income before income taxes	$	(13.3	)	$	8.4		$	(64.6	)	$	23.0
Loss ratio		134.5	%		46.4	%		163.6	%		44.4	%
Expense ratio		35.7	%		25.8	%		29.0	%		29.7	%
Combined ratio		170.2	%		72.2	%		192.6	%		74.1	%

Gross written premiums increased for the three months ended September 30, 2011 as compared to 2010 as a large retained contract that ordinarily renews during the second quarter was renewed during the third quarter. Gross written premium for the nine months ended September 30, 2011 as compared to 2010 increased due to the continued growth of the excess casualty and professional lines unit and an increase in property catastrophe reinstatement premium, offset partially by a decrease in premium generated by our other assumed program.

Earned premiums for the three months ended September 30, 2011 decreased from the same period in 2010 due to an increase in ceded earned premium from our property catastrophe reinsurance book. Earned premiums for the nine months ended September 30, 2011 increased from the same period in 2010 due to premiums received as a result of policies reinstating after first and second quarter catastrophe losses. Earned premiums for the property catastrophe reinsurance unit were $17.1 million and $63.9 million for the three and nine months ended September 30, 2011 compared to $20.4 million and $63.0 million for the same periods in 2010. The excess casualty and professional lines unit contributed earned premiums of $4.1 million and $12.1 million for the three and nine month periods ended September 30, 2011 compared to $3.8 million and $9.8 million for the same periods in 2010.

Included in losses and loss adjustment expenses for the three months ended September 30, 2011 were $13.6 million of catastrophe losses primarily attributable to Hurricane Irene, the Danish Cloudburst and unfavorable development of loss reserves associated with the Japan earthquake and tsunami and the Christchurch earthquake which occurred during the first quarter of 2011 and aggregate reinsurance covers losses of $9.3 million. Also included in losses and loss adjustment expenses for the three months ended September 30, 2011 was $0.2 million in unfavorable loss reserve development on prior accident years, primarily attributable to non-catastrophe losses. Included in losses and loss adjustment expenses for the three months ended September 30, 2010 was $6.1 million of losses resulting from the New Zealand and Chile earthquakes. Partially offsetting these 2010 accident year losses was $2.6 million in favorable loss development on prior accident years comprised of $1.4 million attributable to short-tail non-catastrophe losses and $1.2 million related to other assumed programs.

Included in losses and loss adjustment expenses for the nine months ended September 30, 2011 were $98.3 million of catastrophe losses related to the Japan earthquake and tsunami, the Christchurch earthquake, the Brisbane, Australia floods, the Alabama and Joplin tornados, Hurricane Irene and the Danish Cloudburst and aggregate reinsurance covers losses of $9.3 million. Partially offsetting these losses was $3.6 million in favorable loss reserve development on prior accident years, primarily attributable to non-catastrophe losses. Losses and loss adjustment expenses for the nine months ended September 30, 2010 included

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$22.8 million related to the New Zealand and Chile earthquakes and the Deepwater Horizon incident. Partially offsetting these losses was $14.5 million in favorable development comprised of $12.2 million attributable to short-tail non-catastrophe losses, $1.1 million attributable to 2005 Hurricanes Ike and Gustav, and $1.2 million related to other assumed programs. Loss reserves were $250.2 million and $117.0 million at September 30, 2011 and 2010, respectively.

The increase in the expense ratio for the three months ended September 30, 2011 as compared to 2010 was due to operating costs associated with a new business unit in Brazil and a decrease in earned premium. The decline in the expense ratio for the nine months ended September 30, 2011 as compared to the same period ended 2010 was primarily due to increased ceding commissions and an increase in earned premiums.

Syndicate 1200 (formerly International Specialty): The following table summarizes the results of operations for the Syndicate 1200 segment for the three and nine months ended September 30, 2011 and 2010:

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Gross written premiums	$	135.2		$	79.8		$	335.7		$	329.6
Earned premiums	$	67.3		$	60.7		$	188.2		$	232.2
Losses and loss adjustment expenses		45.5			36.2			163.1			153.6
Underwriting, acquisition and insurance expenses		30.4			28.7			85.3			100.8
Underwriting loss		(8.6	)		(4.2	)		(60.2	)		(22.2	)
Net investment income		4.3			3.9			13.3			10.6
Interest expense		(0.8	)		(0.8	)		(2.4	)		(2.4	)
Fee income, net		0.5			1.2			1.4			1.2
(Loss) income before income taxes	$	(4.6	)	$	0.1		$	(47.9	)	$	(12.8	)
Loss ratio		67.6	%		59.6	%		86.7	%		66.1	%
Expense ratio		45.2	%		47.3	%		45.3	%		43.4	%
Combined ratio		112.8	%		106.9	%		132.0	%		109.5	%

Earned premiums represent premiums earned on the portion of gross written premiums we retain. In 2011, we increased our participation in Lloyd’s Syndicate 1200 from 61% to 67%. For the three months ended September 30, 2011 and 2010, the property division wrote approximately $69.1 million and $52.1 million of gross written premiums, respectively. The casualty division wrote $40.8 million and $24.5 million for the three months ended September 30, 2011 and 2010, respectively. The specialty and aerospace divisions, which are new for 2011, wrote $20.3 million and $4.9 million, respectively, for the three months ended September 30, 2011. The remaining $0.1 million and $3.2 million for the three months ended September 30, 2011 and 2010, respectively, pertain to lines we no longer write.

For the nine months ended September 30, 2011 and 2010, the property division wrote $192.6 million and $220.2 million of gross written premiums, respectively. The casualty division wrote $90.0 million and $103.0 million for the nine months ended September 30, 2011 and 2010. The specialty and aerospace divisions wrote $45.7 million and $7.3 million, respectively, for the nine months ended September 30, 2011. The remaining $0.1 million and $6.4 million for the nine months ended September 30, 2011 and 2010, respectively, pertain to lines we no longer write.

The decrease in property written premiums in 2011 was driven by a planned reduction in property binder business and by significant competition in the direct and facultative market. The decrease in casualty written premiums in 2011 was driven by being more selective in accepting risks within a highly competitive marketplace. The decline in earned premiums in 2011 as compared to 2010 was primarily attributable to the reduction in gross written premiums discussed above.

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Losses and loss adjustment expenses are reported net of losses ceded to the trade reinsurers. Included in losses and loss adjustment expenses for the three months ended September 30, 2011 was $2.7 million in catastrophe losses resulting from storms in the United States, including Hurricane Irene. Included in losses and loss adjustment expenses for the three months ended September 30, 2011 was $3.2 million of net unfavorable loss reserve development on prior accident years, primarily due to $3.3 million of unfavorable development in the property lines and $0.8 million of unfavorable development in the liability lines. Partially offsetting this unfavorable loss reserve development was $0.9 million of favorable development in a number of classes due to better than expected claims experience. Included in losses and loss adjustment expenses for the three months ended September 30, 2010 was $6.1 million of loss expense resulting from the New Zealand earthquake and $0.8 million of favorable loss reserve development on prior accident years primarily within the liability lines.

Included in losses and loss adjustment expenses for the nine months ended September 30, 2011 was $45.5 million in catastrophe losses from the storms in the United States, the New Zealand and Japan earthquakes and the Australian floods. Additionally, included in losses and loss adjustment expenses for the nine months ended September 30, 2011 was $14.8 million of unfavorable loss reserve development on prior accident years. The unfavorable development was primarily attributable to $10.1 million of unfavorable development in the liability lines of business driven by deterioration in the professional indemnity and general liability classes of business related to a small number of specific claims and a reduction in the estimate of future reinsurance recoveries. Additionally, we recognized $4.6 million of unfavorable development related to property lines of business where the claims experience was worse than expected. The losses and loss adjustment expenses for the first nine months of 2010 included $21.3 million of catastrophe losses for the Chile, Haiti and New Zealand earthquakes that occurred in 2010. Additionally, we recognized $2.7 million of net unfavorable loss reserve development on prior accident years. The unfavorable development was primarily attributable to $11.6 million unfavorable development related to liability lines of business. Partially offsetting this unfavorable development was $4.5 million favorable development related to property lines of business and $4.4 million favorable development relating to lines we no longer write.

Loss reserves as of September 30, 2011 were $750.3 million, which includes $197.9 million attributable to trade reinsurers, compared to $611.9 million, which includes $183.8 million of reserves attributable to the trade capital providers as of September 30, 2010.

The decrease in the expense ratio in the three months ended September 30, 2011 was driven by an increase in net earned premium. The increase in the expense ratio for the nine months ended September 30, 2011 as compared to the same period in 2010 was primarily attributable to the reduction in net earned premium. Business written through Lloyd’s typically incurs higher acquisition expenses compared to other insurance markets due to the distribution model.

Fee income represents fees and profit commission derived from the management of third party capital for our underwriting syndicate at Lloyd’s. Fee income, net, for the three months ended September 30, 2011 declined to $0.5 million compared to $1.2 million for the same period in 2010 due to fee income being more than offset by related expenses. Net fee income for the nine months ended September 30, 2011 was $1.4 million compared to $1.2 million for the same period in 2010.

Run-off Lines. The Company has discontinued underwriting certain lines of business, including those lines that were previously reported in Argo Group US, Inc.’s Risk Management segment and PXRE Reinsurance Limited (“PXRE”). As the Company no longer actively underwrites business within these programs, all current activity is related to the management of claims and other administrative functions.

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Also included in the Run-off Lines segment are liabilities associated with other liability policies written in the 1970s and into the 1980s, and include asbestos and environmental liabilities as well as medical malpractice liabilities. The Company regularly monitors the activity of claims within the Run-off Lines.

The following table summarizes the results of operations for the Run-off Lines segment:

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Earned premiums	$	(0.1	)	$	(0.4	)	$	0.3		$	(0.2	)
Losses and loss adjustment expenses (benefits)		6.3			0.3			3.5			(0.3	)
Underwriting, acquisition and insurance expenses		2.0			5.0			7.9			9.8
Underwriting loss		(8.4	)		(5.7	)		(11.1	)		(9.7	)
Net investment income		3.1			4.3			10.4			13.4
Interest expense		(0.5	)		(0.6	)		(1.3	)		(1.8	)
(Loss) income before income taxes	$	(5.8	)	$	(2.0	)	$	(2.0	)	$	1.9

Earned premiums for the three and nine months ended September 30, 2011 and 2010 were attributable to adjustments resulting from final audits, return premium adjustments on retrospectively rated policies and other adjustments on policies previously written.

Losses and loss adjustment expenses for the three months ended September 30, 2011 included $6.3 million of net unfavorable loss reserve development on prior accident years primarily due to $9.7 million of unfavorable development in asbestos and environmental, partially offset by favorable development in other lines. Included in losses and loss adjustment expenses for the three months ended September 30, 2010 was $0.3 million of net unfavorable loss reserve development on prior accident years. The unfavorable loss reserve development in 2010 was the result of $9.5 million unfavorable loss reserve development on asbestos reserves. Partially offsetting this unfavorable loss reserve development was $8.7 million in favorable loss reserve development related to risk management run-off reserves due primarily to better than expected paid and incurred loss activity for workers compensation and $0.5 million of favorable loss reserve development on the legacy PXRE property non-catastrophe reinsurance reserves.

Losses and loss adjustment expenses for the nine months ended September 30, 2011 included $3.5 million of net unfavorable loss reserve development on prior accident years. This unfavorable development is primarily due to $11.7 million of unfavorable development in asbestos and environmental, partially offset by the collection of a contribution settlement from another insurer for a California workers compensation indemnity claim, and favorable development in other lines. The asbestos and environmental unfavorable development is primarily attributable to $8.2 million for asbestos losses driven by increasing severities, defense costs and the settlement of a disputed reinsurance recoverable matter, and $3.5 million for environmental losses driven by one significant environmental claim. Included in losses and loss adjustment expense for the nine months ended September 30, 2010 was $0.3 million of net favorable development driven by $8.2 million of favorable development related to risk management run-off reserves due primarily to better than expected paid and incurred loss activity for workers compensation and $1.6 million in favorable loss reserve development on the legacy PXRE lines. Partially offsetting this favorable development was the $9.5 million in unfavorable loss reserve development on asbestos reserves.

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Loss reserves for the Run-off Lines were as follows:

	Nine Months Ended September 30,
(in millions)	2011						2010
	Gross			Net			Gross			Net
Asbestos and environmental:
Loss reserves, beginning of the year	$	90.2		$	82.7		$	122.7		$	93.0
Incurred losses		14.0			11.7			8.5			9.5
Losses paid		(21.1	)		(19.6	)		(17.4	)		(16.8	)
Loss reserves - asbestos and environmental, end of the period		83.1			74.8			113.8			85.7
Risk management reserves		303.6			212.8			336.2			240.8
PXRE run-off reserves		21.8			21.8			34.2			34.1
Other run-off lines		7.8			7.3			8.7			8.5
Total loss reserves - Run-off Lines	$	416.3		$	316.7		$	492.9		$	369.1

In the third quarter of 2011, we conducted an in-depth review of our asbestos and environmental liability reserves. As a result, the Company strengthened asbestos reserves by $6.2 million due to increased severities and defense costs. Loss reserves for the environmental claims were increased $3.5 million primarily for one significant environmental site. Management regularly monitors and evaluates the activity of these claims and adjustments to the reserves may be recorded during any reporting period.

Underwriting, acquisition and insurance expenses for the Run-off segment consists primarily of administrative expenses. Included in underwriting expense for the nine months ended September 30, 2011 was $4.0 million due to the write off of certain reinsurance balances that were deemed uncollectible. Partially offsetting this expense was a $0.9 million recovery of a reinsurance recoverable balance that was previously written off. Included in underwriting expenses for the three and nine months ended September 30, 2010 was $2.9 million and $5.0 million, respectively, in bad debt expense for reinsurance recoverable balances whose collection was deemed doubtful.

Reinsurance

On June 17, 2011, we entered into an agreement with Loma Reinsurance Ltd. (“Loma Re”), a special purpose entity, to purchase fully collateralized reinsurance protection. Loma Re issued a $100 million catastrophe bond to collateralize its obligation for the coverage. Coverage provided by the bond incepted June 17, 2011, and runs for a period of 18 months. The bond provides protection against the occurrence of two or more and any combination of U.S. hurricanes, U.S. earthquakes, European windstorms, or Japan earthquakes. For activation, the bond establishes per occurrence minimum loss amounts and is triggered by a second and subsequent event that meets specific loss criteria.

For the three and nine months ended September 30, 2011, we have recorded $0 and $16.3 million, respectively, in ceded written premium and have recognized $2.7 million and $3.1 million, respectively, in ceded earned premiums. Management views this transaction as a corporate reinsurance cover; therefore, the operating results from this transaction are reflected in the Corporate and Other segment.

Contractual Obligations

In August 2011, we entered into an agreement with a Texas domiciled insurance company to make an investment in the company for consideration of $20 million. The transaction is currently pending regulatory approval.

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Liquidity and Capital Resources

Our principal operating cash flow sources are premiums and investment income. The primary operating cash uses are claim payments, reinsurance costs, acquisition and operating expenses. Argo Group’s holding companies have access to various sources of liquidity including subsidiary dividends, its revolving credit facility and access to the debt and equity capital markets.

For the nine months ended September 30, 2011, net cash provided by operating activities was $65.1 million compared to $29.5 million of net cash provided for the same period in 2010. The increase in cash provided is partially attributed to the following: the receipt of $16.8 million in 2011 from the settlement of an outstanding reinsurance recoverable balance; the rate of the decline in gross written premium being lower than the rate of the decline during the same period in 2010, the receipt of $6.4 million on foreign currency forward contracts and continued emphasis on expense control during the nine months ended September 30, 2011.

From January 1, 2011 through September 30, 2011, we repurchased 1,180,769 shares of our common stock at an average price of $31.24 for a total cost of $36.8 million. From October 1, 2011 through October 7, 2011 (the date of the last purchase under the Rule 10b5-1 trading plan that was initiated on September 15, 2011), we repurchased an additional 43,932 shares of our common stock at an average price of $28.52 for a total cost of $1.3 million. Since 2008, when we first began buying back our common shares, through October 7, 2011, we have repurchased 4,588,261 shares of our common stock at an average price of $32.63 for a total cost of $149.7 million.

On April 30, 2010, each of Argo Group International Holdings, Ltd., Argo Group US, Inc. (“Argo Group US”), Argo International Holdings Limited, and Argo Underwriting Agency Limited (the “Borrowers”) entered into a $150,000,000 Credit Agreement (“Credit Agreement”) with major money center banks. On July 22, 2011 the Borrowers entered into Amendment No. 2 to the Credit Agreement which increased the revolving credit facility under the Credit Agreement from $150 million to $170 million, extended the maturity date from April 30, 2013 to April 30, 2014, and modified certain other terms. Borrowings under the Credit Agreement may be used for general corporate purposes, including working capital and permitted acquisitions, and each of the Borrowers has agreed to be jointly and severally liable for the obligations of the other Borrowers under the Credit Agreement.

The Credit Agreement contains customary events of default. If an event of default occurs and is continuing, the Borrowers could be required to repay all amounts outstanding under the Credit Agreement. Lenders holding more than 51% of the loans and commitments under the Credit Agreement may elect to accelerate the maturity of the loans under the Credit Agreement upon the occurrence and during the continuation of an event of default. No defaults or events of defaults have occurred as of the date of this filing.

Currently, we do not have an outstanding balance under the $170.0 million credit facility. The credit facility allows up to $15.0 million of the facility to be used for letters of credit, subject to availability under the line. Currently, we have a $0.4 million letter of credit issued and outstanding under the facility.

On June 30, 2011, Argo Group US received an extraordinary dividend in the amount of $30 million in cash from Rockwood Casualty Insurance Company, which is a primary direct subsidiary of Argo Group US.

On August 5, 2011, our Board of Directors declared a quarterly cash dividend in the amount of $0.12 on each share of common stock outstanding. On September 15, 2011, we paid $3.3 million to our shareholders of record on September 1, 2011. For the nine months ended September 30, 2011, we have paid cash dividends totaling $10.0 million to our shareholders. On November 8, 2011, our Board of Directors declared a quarterly cash dividend in the amount of $0.12 on each share of common stock outstanding. The dividend will be paid on December 15, 2011 to our shareholders of record on December 1, 2011.

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Refer to Part II, Item 7 - “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital Resources” in Argo Group’s Annual Report on Form 10-K for the year ended December 31, 2010 that Argo Group filed with the Securities and Exchange Commission on February 28, 2011 for further discussion on Argo Group’s liquidity.

Recent Accounting Standards and Critical Accounting Estimates

New Accounting Standards

The discussion of the adoption and pending adoption of recently issued accounting policies is included in Note 2, “Recently Issued Accounting Standards,” in the Notes to the Consolidated Financial Statements, included in Part I, Item 1 - “Consolidated Financial Statements (unaudited).”

Critical Accounting Estimates

Refer to “Critical Accounting Estimates” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2010 that we filed with the Securities and Exchange Commission on February 28, 2011 for information on accounting policies that we consider critical in preparing our consolidated financial statements. These policies include significant estimates made by management using information available at the time the estimates were made. However, these estimates could change materially if different information or assumptions were used.

Income Taxes

We are incorporated under the laws of Bermuda and, under current Bermuda law, are not obligated to pay any taxes in Bermuda based upon income or capital gains. We have received an undertaking from the Supervisor of Insurance in Bermuda pursuant to the provisions of the Exempted Undertakings Tax Protection Amendment Act, 2011, which exempts us from any Bermuda taxes computed on profits, income or any capital asset, gain or appreciation, or any tax in the nature of estate duty or inheritance tax, at least until the year 2035.

We do not consider ourselves to be engaged in a trade or business in the United States or the United Kingdom and, accordingly, do not expect to be subject to direct United States or United Kingdom income taxation.

We have subsidiaries based in the United Kingdom that are subject to the tax laws of that country. Under current law, these subsidiaries are taxed at the applicable corporate tax rates. Six of the United Kingdom subsidiaries are deemed to be engaged in business in the United States and are therefore subject to United States corporate tax in respect of a proportion of their United States underwriting business only. Relief is available against the United Kingdom tax liabilities in respect of overseas taxes paid that arise from the underwriting business. Corporate income tax losses incurred in the United Kingdom can be carried forward, for application against future income, indefinitely. Our United Kingdom subsidiaries file separate United Kingdom income tax returns.

We have subsidiaries based in the United States that are subject to the tax laws of that country. Under current law, these subsidiaries are taxed at the applicable corporate tax rates. Our United States subsidiaries file a consolidated United States federal income tax return.

We also have operations in Belgium, Brazil, France, Ireland and Switzerland, which also are subject to income taxes imposed by the jurisdiction in which they operate. We have operations in the United Arab Emirates, which are not subject to income tax under the laws of that country.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

We believe that we are principally exposed to three types of market risk: interest rate risk, credit risk and foreign currency risk.

Interest Rate Risk

Our fixed maturities portfolio is exposed to interest rate risk. Fluctuations in interest rates have a direct impact on the fair valuation of these securities. As interest rates rise, the fair value of our fixed maturity portfolio generally falls, and the converse is generally also true. We manage interest rate risk through an asset liability strategy that involves the selection of investments with appropriate characteristics, such as duration, yield, currency and liquidity that are tailored to the anticipated cash outflow characteristics of our liabilities. A significant portion of the investment portfolio matures each quarter, allowing for reinvestment at current market rates. Based upon a pricing model, we determine the estimated change in fair value of the fixed maturity securities, assuming immediate parallel shifts in the treasury yield curve while keeping spreads between individual securities and treasuries static.

Credit Risk

We have exposure to credit risk primarily as a holder of fixed maturity investments, short-term investments, and other investments. Our risk management strategy and investment policy is to primarily invest in debt instruments of high credit quality issuers and to limit the amount of credit exposure with respect to particular ratings categories and any one issuer.

As shown on the accompanying table, our fixed maturities portfolio is diversified among different types of investments and has a weighted average rating of AA. At September 30, 2011, 84.0% ($2.7 billion at fair value) of our portfolio was rated A or better, with 50.9% ($1.7 billion at fair value) of our portfolio rated AAA.

(in millions)	Fair Value AAA		Fair Value AA		Fair Value A		Fair Value Other		Total
USD denominated:
U.S. Governments	$	507.2	$	6.3	$	3.4	$	—	$	516.9
Non-U.S. Governments		7.3		1.5		2.0		32.4		43.2
Obligations of states and political subdivisions		148.7		404.9		62.4		9.2		625.2
Credit-Financial		28.0		148.1		143.0		73.9		393.0
Credit-Industrial		3.3		20.8		140.7		252.9		417.7
Credit-Utility		—		14.6		42.4		112.6		169.6
Structured securities:
CMO/MBS-agency		558.3		0.4		—		—		558.7
CMO/MBS-non agency		9.7		1.3		0.6		9.2		20.8
CMBS		97.9		11.1		—		4.4		113.4
ABS-residential		2.0		0.3		1.6		10.5		14.4
ABS-non residential		67.0		1.1		0.3		3.0		71.4
Foreign denominated:
Governments		202.5		5.0		8.3		4.6		220.4
Credit		27.1		28.2		30.3		8.7		94.3
Total fixed maturities	$	1,659.0	$	643.6	$	435.0	$	521.4	$	3,259.0

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We also hold a diversified investment portfolio of common stocks in various industries and market segments, ranging from small market capitalization stocks to large capitalization S&P 500 companies. Marketable equity securities are carried on the consolidated balance sheets at fair value, and are subject to the risk of potential loss in fair value resulting from adverse changes in prices. At September 30, 2011, the fair value of the equity securities portfolio was $353.1 million.

Foreign Currency Risk

We have exposure to foreign currency risk in both our insurance contracts and our invested assets. Some of our insurance contracts provide that ultimate losses may be payable in foreign currencies depending on the country of original loss. Foreign currency exchange rate risk exists to the extent that there is an increase in the exchange rate of the foreign currency in which losses are ultimately owed. Thus, we attempt to manage our foreign currency risk by seeking to match our liabilities under insurance and reinsurance polices that are payable in foreign currencies with cash and investments that are denominated in such currencies. We supplement our balance sheet matching of currencies approach with foreign exchange forward contracts, as deemed necessary or prudent; and typically to manage currency exposure on losses related to global catastrophe events. Due to the extended time frame for settling the claims plus the fluctuation in currency exchange rates, the potential exists for us to realize gains and or losses related to the exchange rates. In addition, we may experience foreign currency gains or losses related to exchange rate fluctuations in operating expenses as certain operating costs are payable in currencies other than the U.S. Dollar. For the three and nine months ended September 30, 2011, we recorded realized gains of $1.9 million and realized losses of $11.1 million, respectively, from movements in foreign currency rates on our insurance operations and realized gains of $1.8 million and $4.2 million, respectively, in movements on foreign currency rates in our investment portfolio and $1.1 million in realized losses and $2.8 million in realized gains, respectively, from the currency forward contracts. In addition, we had unrealized losses at September 30, 2011 of $11.7 million in movements on foreign currency rates in our investment portfolio, which is recorded in other comprehensive income.

We enter into short-term, currency spot and forward contracts designed to mitigate foreign exchange rate exposure for certain non-U.S. Dollar denominated fixed maturity investments. The forward contracts used are typically less than sixty days and may be renewed, as long as the non-U.S. Dollar denominated fixed maturities investments are held in the portfolio. Forward contracts related to these investments are designated as hedges for accounting purposes. The net realized effect on income for the three and nine months ended September 30, 2011 was not material.

Item 4. Controls and Procedures

Argo Group, under the supervision and with the participation of its management, including the Chief Executive Officer and the Chief Financial Officer, evaluated the effectiveness of the design and operation of our “disclosure controls and procedures” (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of September 30, 2011. In designing and evaluating these disclosure controls and procedures, Argo Group and its management recognize that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in evaluating and implementing possible controls and procedures. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the disclosure controls and procedures were effective at the reasonable assurance level to ensure that information required to be disclosed by Argo Group in the reports filed or submitted under the Exchange Act are recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.

There were no changes in the internal control over financial reporting made during the quarter ended September 30, 2011 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. We review our disclosure controls and procedures, which may include internal controls over financial reporting, on an ongoing basis. From time to time, management makes changes to enhance the effectiveness of these controls and ensure that they continue to meet the needs of our business activities over time.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

On December 4, 2008, a lawsuit was filed against PXRE Group Ltd. (now Argo Group) and certain of PXRE’s former officers in United States District Court for the Southern District of New York alleging causes of action on behalf of a group of institutional shareholders that purchased Series D Perpetual Non-voting Preferred Shares of PXRE pursuant to the Private Placement Memorandum dated on or about September 28, 2005 (the “Private Placement”). The lawsuit alleges that the Private Placement was a public offering and that the Private Placement Memorandum contained false and misleading statements or omissions concerning PXRE’s business, prospects and operations actionable under Section 12(a) (2) of the Securities Act of 1933. In addition, the lawsuit alleges claims under New York state law for negligent misrepresentation and common law fraud based upon, among other things, statements contained in the Private Placement Memorandum and alleged false and misleading statements by PXRE’s named former officers. The facts and circumstances of the Private Placement litigation arise generally out of statements or alleged omissions relating to the impact of hurricanes Katrina, Rita and Wilma on PXRE. On April 6, 2009, the institutional investors filed an amended complaint. Argo Group filed a motion to dismiss the amended complaint on May 6, 2009. On January 26, 2010, the District Court granted our motion, dismissing the plaintiffs’ federal law causes of action without prejudice, and holding that the amended complaint failed to allege facts that would show that the Private Placement could be construed to be a public offering or that the Private Placement should be integrated with PXRE’s public share offering. The Court’s order provided the plaintiffs with a deadline of February 22, 2010 to file amended pleadings setting forth the nature of the entities to which the Private Placement was offered. Based on the dismissal of the federal law claims, the Court’s order also dismissed without prejudice all state law claims asserted by the plaintiffs for lack of subject matter jurisdiction, without prejudice to the plaintiffs’ right to file a separate action in state court asserting such claims. On February 22, 2010, the plaintiffs filed a Second Amended Complaint in the District Court case seeking to overcome the deficiencies outlined in the order of dismissal. At a pre-motion conference held on April 14, 2010, the Court indicated that the Second Amended Complaint was also insufficient to raise an issue of fact as to the federal law causes of action. The Court allowed plaintiffs a third opportunity to replead, and plaintiffs filed their Third Amended Complaint on April 23, 2010. On May 14, 2010, we filed a Motion to Dismiss Plaintiffs’ Third Amended Complaint. On March 16, 2011, the Court heard arguments on this motion. The Court denied our motion as to certain threshold arguments regarding plaintiffs’ federal securities claims, finding that they raised factual issues. The Court directed the parties to engage in limited discovery in an attempt to resolve these factual issues. The Court’s March 16 decision did not extend to certain other arguments for dismissal of plaintiffs’ federal claims, nor to our arguments with respect to plaintiffs’ state law claims.

At this stage, Argo Group is unable to determine with any reasonable certainty the specific claims, litigants, or alleged damages that ultimately may be associated with the Private Placement lawsuit or any other future proceedings regarding the alleged facts and circumstances described above, nor can we currently predict the timing of any rulings, trials or other significant events relating to such proceedings. Given these limitations and the inherent difficulty of projecting the outcome of litigated disputes, we are unable to reasonably estimate the possible loss, range of loss or legal costs that are likely to arise out of the pending securities litigation or any future proceedings relating to the above matters at this time. Argo Group has insurance protection that may cover a portion of any potential loss or legal costs, but a settlement above the coverage limits could impact our financial position and results of operations.

Based on all information available to Argo Group at this time, management believes that PXRE’s reserving practices, financial disclosures, public filings and securities offerings in the aftermath of the 2005 hurricanes complied fully with all applicable regulatory and legal requirements. However, if unfavorable outcomes in the Private Placement lawsuit were to occur and result in the payment of substantial damages or fines or criminal penalties, these outcomes could have a material adverse effect on our business, cash flows, and results of operations, financial position and prospects.

47

Argo Group’s subsidiaries are parties to other legal actions incidental to their business. Based on the opinion of counsel, management believes that the resolution of these matters will not materially affect our financial condition or results of operations.

Item 1a. Risk Factors

See “Risk Factors” in the Argo Group Annual Report on Form 10-K for the year ended December 31, 2010 for a detailed discussion of the risk factors affecting the Company.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

Issuer Purchase of Equity Securities

On February 18, 2011, our Board of Directors authorized the repurchase of up to $150.0 million of our common shares (“2011 Repurchase Authorization”). The 2011 Repurchase Authorization supersedes the repurchase authorization approved on November 13, 2007 by the Board of Directors. Excluding the shares surrendered by employees in payment for the minimum required withholding taxes due to the vesting of restricted stock units, during the three months ended September 30, 2011, we repurchased 620,940 shares at a cost of $17.0 million.

As of September 30, 2011, we had repurchased a total of 4,544,329 of our common shares (total of $148.4 million repurchased) since the inception of the buy-back program in 2007. Shares of stock repurchased will be held as treasury shares in accordance with the provisions of the Bermuda Companies Act 1981.

The following table provides information with respect to shares of our common stock that were repurchased or surrendered during each of the three months ended September 30, 2011:

Period	Total Number of Shares Purchased (a)		Average Price Paid per Share (b)		Total Number of Shares Purchased as Part of Publicly Announced  Plan or Program (c)		Approximate Dollar Value of Shares That May Yet Be Purchased  Under the Plan or Program (d)
July 1 through July 31, 2011		—	$	—		—	$	145,000,004
August 1 through August 31, 2011		74,835	$	27.34		72,980	$	143,007,973
September 1 through September 30, 2011		547,960	$	27.42		547,960	$	127,984,295
Total		622,795	$	27.41		620,940

Employees are allowed to surrender shares to settle the tax liability incurred upon the vesting of shares under the various employees equity compensation plans. For the three months ended September 30, 2011, we received 1,855 shares of our common stock that were surrendered by employees in payment for the minimum required withholding taxes due to the vesting of non-vested shares. In the above table, these shares are included in columns (a) and (b), but excluded from columns (c) and (d). These shares do not reduce the number of shares that may yet be purchased under the repurchase plan.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Removed and Reserved

48

Item 5. Other Information

None.

Item 6. Exhibits

A list of exhibits required to be filed as part of this report is set forth in the Exhibit Index of this Form 10-Q, which immediately precedes such exhibits, and is incorporated herein by reference.

49

EXHIBIT INDEX

Exhibit Number	Description
10.1	Amendment No. 2 to Credit Agreement, dated as of July 11, 2011, by and among Argo Group International Holdings, Ltd., Argo Group US, Inc., Argo Group International Holdings Limited and Argo Underwriting Agency Limited, JPMorgan Chase Bank, N.A., as administrative agent, and the other financial institutions party thereto (incorporated by reference to Exhibit 10.1 to Argo Group’s Current Report on Form 8-K filed with the Securities and Exchange Commission on July 15, 2011)
12.1	Statements of Computation of Ratios of Earnings to Fixed Charges and Earnings to Combined Fixed Charges and Preferred Share Dividends
31.1	Rule 13a – 14(a)/15d – 14(a) Certification of the Chief Executive Officer
31.2	Rule 13a – 14(a)/15d – 14(a) Certification of the Chief Financial Officer
32.1+	Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2+	Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101++	Interactive Data File.

+ This exhibit shall be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

++ As provided in Rule 406T of Regulation S-T, this information is furnished and not filed for purposes of Sections 11 and 12 of the Securities Act of 1933 and Section 18 of the Securities Exchange Act of 1934.

50

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report or amendment thereto to be signed on its behalf by the undersigned thereunto duly authorized.

	ARGO GROUP INTERNATIONAL HOLDINGS, LTD.
November 8, 2011	By:	/s/ Mark E. Watson III
		Mark E. Watson III
		President and Chief Executive Officer
November 8, 2011	By:	/s/ Jay S. Bullock
		Jay S. Bullock
		Executive Vice President and Chief Financial Officer

51

EX-12.1

Exhibit 12.1

ARGO GROUP INTERNATIONAL HOLDINGS, LTD.

STATEMENTS OF COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES

AND EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED SHARE DIVIDENDS

	Nine Months  Ended September 30,					Years Ended December 31,
(in millions, except ratios)	2011			2010		2010		2009		2008		2007		2006
Earnings:
(Loss) income from continuing operations before provision for income taxes and extraordinary item	$	(71.2	)	$	97.0	$	115.3	$	142.4	$	86.4	$	119.8	$	163.0
Add:
Fixed charges		19.7			20.1		26.6		29.5		34.0		23.6		16.4
Total earnings	$	(51.5	)	$	117.1	$	141.9	$	171.9	$	120.4	$	143.4	$	179.4
Fixed charges:
Interest expense	$	16.5		$	17.3	$	22.9	$	25.7	$	29.9	$	20.9	$	13.0
Preferred share dividends		0.0			0.0		0.0		0.0		0.0		0.1		1.5
Rental interest factor		3.2			2.8		3.7		3.8		4.1		2.6		1.9
Total fixed charges	$	19.7		$	20.1	$	26.6	$	29.5	$	34.0	$	23.6	$	16.4
Ratio of earnings to fixed charges		(a)			5.8:1		5.3:1		5.8:1		3.5:1		6.1:1		10.9:1

(a) The coverage deficiency is $71.2 million.

EX-31.1

Exhibit 31.1

Rule 13a-14(a)/15d-14(a)

Certification of the Chief Executive Officer

I, Mark E. Watson III, President and Chief Executive Officer of Argo Group International Holdings, Ltd., certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Argo Group International Holdings, Ltd.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 8, 2011

/s/ Mark E. Watson III

Mark E. Watson III

President and Chief Executive Officer

EX-31.2

Exhibit 31.2

Rule 13a-14(a)/15d-14(a)

Certification of the Chief Financial Officer

I, Jay S. Bullock, Executive Vice President and Chief Financial Officer of Argo Group International Holdings, Ltd., certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Argo Group International Holdings, Ltd.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 8, 2011

/s/ Jay S. Bullock

Jay S. Bullock

Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of CEO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Argo Group International Holdings, Ltd. (the “Company”) for the quarterly period ended September 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Mark E. Watson III, as President and Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

*        *        *

Certified this 8^th day of November 2011.

/s/ Mark E. Watson III

Mark E. Watson III

President and Chief Executive Officer

EX-32.2

Exhibit 32.2

Certification of CFO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Argo Group International Holdings, Ltd. (the “Company”) for the quarterly period ended September 30, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Jay S. Bullock, as Executive Vice President and Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002 that, to the best of his knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

*        *        *

Certified this 8^th day of November 2011.

/s/ Jay S. Bullock

Jay S. Bullock

Executive Vice President and Chief Financial Officer

XML

Equity-Based Compensation (Summary Of Option Activity) (Details) (2007 Plan [Member], USD $)	9 Months Ended
	Sep. 30, 2011
2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at January 1, 2011	447,603
Granted, Shares	84
Exercised, Shares	(3,104)
Expired or forfeited, Shares	(31,504)
Shares, Outstanding at September 30, 2011	413,079
Weighted-Average Exercise Price, Outstanding at January 1, 2011	$ 36.28
Granted, Weighted-Average Exercise Price	$ 39.19
Exercised, Weighted-Average Exercise Price	$ 35.23
Expired or forfeited, Weighted-Average Exercise Price	$ 36.96
Weighted-Average Exercise Price, Outstanding at September 30, 2011	$ 36.69

XML

Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Sep. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Available-for-sale, cost	$ 3,154.0	$ 3,250.4
Equity securities, cost	267.9	208.8
Other investments, cost	217.7	153.5
Short-term investments, cost	$ 354.7	$ 375.2
Common shares, par value	$ 1	$ 1
Common shares, shares authorized	500,000,000	500,000,000
Common shares, shares issued	31,274,221	31,206,796
Common shares, shares outstanding	31,274,221	31,206,796
Treasury shares, shares	4,544,329	3,363,560

XML

Consolidated Statements Of (Loss) Income (USD $) In Millions, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Premiums and other revenue:
Earned premiums	$ 268.2	$ 288.9	$ 800.9	$ 936.9
Net investment income	30.0	33.6	96.3	100.5
Fee income, net	1.4	1.7	1.8	2.0
Net realized investment and other gains	3.9	9.1	37.7	28.6
Total revenue	303.5	333.3	936.7	1,068.0
Expenses:
Losses and loss adjustment expenses	199.6	176.9	664.4	604.9
Underwriting, acquisition and insurance expenses	106.3	115.8	315.9	360.7
Interest expense	5.6	5.8	16.5	17.3
Foreign currency exchange (gain) loss	(1.9)	3.4	11.1	(11.9)
Total expenses	309.6	301.9	1,007.9	971.0
(Loss) income before income taxes	(6.1)	31.4	(71.2)	97.0
Provision for income taxes	6.0	8.4	12.6	27.2
Net (loss) income	(12.1)	23.0	(83.8)	69.8
Net (loss) income per common share:
Basic	$ (0.44)	$ 0.78	$ (3.06)	$ 2.33
Diluted	$ (0.44)	$ 0.77	$ (3.06)	$ 2.31
Dividend declared per common share:	$ 0.12	$ 0.12	$ 0.36	$ 0.36
Weighted average common shares:
Basic	27,237,788	29,504,900	27,374,953	29,998,803
Diluted	27,237,788	29,876,350	27,374,953	30,333,685
Realized investment and other gains before other-than-temporary impairment losses	5.1	9.1	38.9	29.4
Other-than-temporary impairment losses recognized in earnings
Other-than-temporary impairment losses on fixed maturities	(0.1)	0	(0.1)	(0.8)
Other-than-temporary impairment losses on equity securities	(1.1)	0	(1.1)	0
Non-credit portion of loss recognized in other comprehensive income	0	0	0	0
Impairment losses recognized in earnings	(1.2)	0	(1.2)	(0.8)
Net realized investment and other gains	$ 3.9	$ 9.1	$ 37.7	$ 28.6

XML

Equity-Based Compensation (Summary Of Option Activity Under The Amended Plan) (Details) (Cash-Settled SARs Activity [Member], USD $)	9 Months Ended
	Sep. 30, 2011
Cash-Settled SARs Activity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at January 1, 2011	659,224
Granted, Shares	563,709
Exercised, Shares	(20,339)
Expired or forfeited, Shares	(127,659)
Shares, Outstanding at September 30, 2011	1,074,935
Weighted-Average Exercise Price, Outstanding at January 1, 2011	$ 28.25
Granted, Weighted-Average Exercise Price	$ 32.48
Exercised, Weighted-Average Exercise Price	$ 28.07
Expired or forfeited, Weighted-Average Exercise Price	$ 29.12
Weighted-Average Exercise Price, Outstanding at September 30, 2011	$ 30.37

XML

Income Taxes (Tables)

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Tax Provision

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Current tax provision	$	2.6		$	12.9		$	3.0		$	31.9
Deferred tax provision (benefit) related to:
Future tax deductions		3.6			(4.3	)		10.3			(4.0	)
Valuation allowance change		(0.2	)		(0.2	)		(0.7	)		(0.7	)
Income tax provision	$	6.0		$	8.4		$	12.6		$	27.2

Reconciliation Of The Difference Between The (Benefit) Provision For Income Taxes And The Expected Tax Provision At The Weighted Average Tax Rate

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Income tax provision at expected rate	$	6.7		$	9.3		$	16.5		$	33.5
Tax effect of:
Tax-exempt interest		(1.4	)		(1.4	)		(4.3	)		(4.6	)
Dividends received deduction		(0.1	)		(0.4	)		(1.2	)		(1.1	)
Valuation allowance change		(0.2	)		(0.2	)		(0.7	)		(0.7	)
Other permanent adjustments, net		0.8			1.0			1.7			1.1
Adjustment for 2009 tax return		0.0			1.3			0.0			1.3
Adjustment for annualized rate		0.9			0.1			(0.1	)		(0.7	)
United States state tax expense (benefit)		0.1			0.3			(0.3	)		0.2
Prior year foreign taxes recovered		(0.3	)		0.0			(0.3	)		0.0
Deferred tax rate reduction		(0.1	)		0.0			(0.1	)		0.0
Other foreign adjustments		0.0			0.1			0.0			0.2
Foreign exchange adjustments		(0.4	)		(1.7	)		1.4			(2.0	)
Income tax provision	$	6.0		$	8.4		$	12.6		$	27.2

XML

Document And Entity Information	9 Months Ended
	Sep. 30, 2011	Nov. 01, 2011
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Entity Registrant Name	Argo Group International Holdings, Ltd.
Entity Central Index Key	0001091748
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		31,282,450

XML

Equity-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended								9 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Maximum [Member]	Sep. 30, 2011 Amended Plan [Member] Non-Qualified Stock Options [Member]	Sep. 30, 2010 Amended Plan [Member] Non-Qualified Stock Options [Member]	Sep. 30, 2011 2007 Plan [Member]	Sep. 30, 2010 2007 Plan [Member]	Nov. 30, 2007 2007 Plan [Member]	Sep. 30, 2011 Restricted Share Units [Member]	Sep. 30, 2010 Restricted Share Units [Member]	Sep. 30, 2011 Stock-Settled SARs Activity [Member]	Sep. 30, 2010 Stock-Settled SARs Activity [Member]	Jun. 30, 2011 Cash-Settled SARs Activity [Member]	Sep. 30, 2011 Cash-Settled SARs Activity [Member]	Sep. 30, 2010 Cash-Settled SARs Activity [Member]	Sep. 30, 2011 Deferred Compensation Plan [Member]	Sep. 30, 2010 Deferred Compensation Plan [Member]	Sep. 30, 2011 Amended Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized								4,500,000										6,250,000
Share-based compensation arrangement by share-based payment award, terms of award	Share options and SARs will count as one share for the purposes of the limits under the 2007 Plan; restricted shares, restricted share units, performance units, performance shares or other share-based incentive awards which settle in common shares will count as 2.75 shares for purpose of the limits under the 2007 Plan.
Share-based compensation arrangement by share-based payment award, award vesting period, minimum, years						1
Share-based compensation arrangement by share-based payment award, award vesting period, maximum, years						5
Share-based compensation arrangement by share-based payment award, compensation cost				$ 0.2	$ 0.4	$ 0.9	$ 0.9		$ 1.1	$ 0.9	$ 1.0	$ 1.2
Employee service share-based compensation, cash received from exercise of stock options	0.3
Employee service share-based compensation, unrecognized compensation costs on nonvested awards									3.8		4.7			3.0
Share-based compensation arrangement by share-based payment award, award vesting period, minimum, years	one								three		two			two
Share-based compensation arrangement by share-based payment award, award vesting period, maximum, years	five								five		five			four
Share-based compensation arrangement by share-based payment award, discount from market price	100.00%	50.00%
Deferred compensation arrangement with individual, description	Under the Plan, non-employee directors can elect each year to defer payment of 50% or 100% of their cash compensation payable during the next calendar year.
Deferred compensation arrangement with individual, employer contribution percentage	75.00%
Deferred compensation arrangement with individual, interest rate	2 percent above the prime rate
Deferred compensation arrangement with individual, distributions period, months		6
Deferred compensation arrangement with individual, shares authorized for issuance	1,650
Deferred compensation arrangement with individual, compensation expense													1.3		1.9	0.4	0.6
Unamortized expenses						$ 0.8
Count of restricted shares, settle in common shares						2.75
Term of share options			seven
Award vesting period, minimum (in years)	one								three		two			two
Award vesting period, maximum (in years)	five								five		five			four

XML

Underwriting, Acquisition And Insurance Expenses (Tables)

9 Months Ended

Sep. 30, 2011

Underwriting, Acquisition And Insurance Expenses [Abstract]

Underwriting, Acquisition And Insurance Expenses

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
(in millions)	2011			2010		2011		2010
Commissions	$	49.0		$	46.6	$	143.1	$	163.3
General expenses		51.0			58.1		153.1		158.7
Premium taxes, boards and bureaus		8.0			6.9		19.7		19.5
		108.0			111.6		315.9		341.5
Net (deferral) amortization of policy acquisition costs		(1.7	)		4.2		0.0		19.2
Total underwriting, acquisition and insurance expenses	$	106.3		$	115.8	$	315.9	$	360.7

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Income Taxes (Reconciliation Of The Difference Between The (Benefit) Provision For Income Taxes And The Expected Tax Provision At The Weighted Average Tax Rate) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Income Taxes [Abstract]
Income tax provision at expected rate	$ 6.7	$ 9.3	$ 16.5	$ 33.5
Tax-exempt interest	(1.4)	(1.4)	(4.3)	(4.6)
Dividends received deduction	(0.1)	(0.4)	(1.2)	(1.1)
Valuation allowance change	(0.2)	(0.2)	(0.7)	(0.7)
Other permanent adjustments, net	0.8	1.0	1.7	1.1
Adjustment for 2009 tax return	0	1.3	0	1.3
Adjustment for annualized rate	0.9	0.1	(0.1)	(0.7)
United States state tax expense (benefit)	0.1	0.3	(0.3)	0.2
Prior year foreign taxes recovered	(0.3)	0	(0.3)	0
Deferred tax rate reduction	(0.1)	0	(0.1)	0
Other foreign adjustments	0	0.1	0	0.2
Foreign exchange adjustments	(0.4)	(1.7)	1.4	(2.0)
Income tax provision	$ 6.0	$ 8.4	$ 12.6	$ 27.2

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Commitments And Contingencies

9 Months Ended

Sep. 30, 2011

Commitments And Contingencies [Abstract]

Commitments And Contingencies

6.    Commitments and Contingencies

On December 4, 2008, a lawsuit was filed against PXRE Group Ltd. (now Argo Group) and certain of PXRE's former officers in United States District Court for the Southern District of New York alleging causes of action on behalf of a group of institutional shareholders that purchased Series D Perpetual Non-voting Preferred Shares of PXRE pursuant to the Private Placement Memorandum dated on or about September 28, 2005 (the "Private Placement"). The lawsuit alleges that the Private Placement was a public offering and that the Private Placement Memorandum contained false and misleading statements or omissions concerning PXRE's business, prospects and operations actionable under Section 12(a) (2) of the Securities Act of 1933. In addition, the lawsuit alleges claims under New York state law for negligent misrepresentation and common law fraud based upon, among other things, statements contained in the Private Placement Memorandum and alleged false and misleading statements by PXRE's named former officers. The facts and circumstances of the Private Placement litigation arise generally out of statements or alleged omissions relating to the impact of hurricanes Katrina, Rita and Wilma on PXRE. On April 6, 2009, the institutional investors filed an amended complaint. Argo Group filed a motion to dismiss the amended complaint on May 6, 2009. On January 26, 2010, the District Court granted our motion, dismissing the plaintiffs' federal law causes of action without prejudice, and holding that the amended complaint failed to allege facts that would show that the Private Placement could be construed to be a public offering or that the Private Placement should be integrated with PXRE's public share offering. The Court's order provided the plaintiffs with a deadline of February 22, 2010 to file amended pleadings setting forth the nature of the entities to which the Private Placement was offered. Based on the dismissal of the federal law claims, the Court's order also dismissed without prejudice all state law claims asserted by the plaintiffs for lack of subject matter jurisdiction, without prejudice to the plaintiffs' right to file a separate action in state court asserting such claims. On February 22, 2010, the plaintiffs filed a Second Amended Complaint in the District Court case seeking to overcome the deficiencies outlined in the order of dismissal. At a pre-motion conference held on April 14, 2010, the Court indicated that the Second Amended Complaint was also insufficient to raise an issue of fact as to the federal law causes of action. The Court allowed plaintiffs a third opportunity to replead, and plaintiffs filed their Third Amended Complaint on April 23, 2010. On May 14, 2010, we filed a Motion to Dismiss Plaintiffs' Third Amended Complaint. On March 16, 2011, the Court heard arguments on this motion. The Court denied our motion as to certain threshold arguments regarding plaintiffs' federal securities claims, finding that they raised factual issues. The Court directed the parties to engage in limited discovery in an attempt to resolve these factual issues. The Court's March 16 decision did not extend to certain other arguments for dismissal of plaintiffs' federal claims, nor to our arguments with respect to plaintiffs' state law claims.

At this stage, Argo Group is unable to determine with any reasonable certainty the specific claims, litigants, or alleged damages that ultimately may be associated with the Private Placement lawsuit or any other future proceedings regarding the alleged facts and circumstances described above, nor can we currently predict the timing of any rulings, trials or other significant events relating to such proceedings. Given these limitations and the inherent difficulty of projecting the outcome of litigated disputes, we are unable to reasonably estimate the possible loss, range of loss or legal costs that are likely to arise out of the pending securities litigation or any future proceedings relating to the above matters at this time. Argo Group has insurance protection that may cover a portion of any potential loss or legal costs, but a settlement above the coverage limits could impact our financial position and results of operations.

Based on all information available to Argo Group at this time, management believes that PXRE's reserving practices, financial disclosures, public filings and securities offerings in the aftermath of the 2005 hurricanes complied fully with all applicable regulatory and legal requirements. However, if unfavorable outcomes in the Private Placement lawsuit were to occur and result in the payment of substantial damages or fines or criminal penalties, these outcomes could have a material adverse effect on our business, cash flows, and results of operations, financial position and prospects.

Argo Group's subsidiaries are parties to other legal actions incidental to their business. Based on the opinion of counsel, management believes that the resolution of these matters will not materially affect our financial condition or results of operations.

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Revenue And (Loss) Income Before Income Taxes For Each Segment

	For the Three  Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Revenue:
Earned premiums
Excess and Surplus Lines	$	99.4		$	122.2		$	305.6		$	376.0
Commercial Specialty		82.9			81.6			233.7			254.2
International Specialty		21.4			24.8			76.2			74.7
Syndicate 1200		67.3			60.7			188.2			232.2
Run-off Lines		(0.1	)		(0.4	)		0.3			(0.2	)
Corporate and Other		(2.7	)		0.0			(3.1	)		0.0
Total earned premiums		268.2			288.9			800.9			936.9
Net investment income
Excess and Surplus Lines		13.2			14.4			42.4			43.7
Commercial Specialty		6.6			7.2			21.0			22.1
International Specialty		2.6			2.4			8.5			6.4
Syndicate 1200		4.3			3.9			13.3			10.6
Run-off Lines		3.1			4.3			10.4			13.4
Corporate and Other		0.2			1.4			0.7			4.3
Total net investment income		30.0			33.6			96.3			100.5
Fee income, net		1.4			1.7			1.8			2.0
Net realized investment and other gains		3.9			9.1			37.7			28.6
Total revenue	$	303.5		$	333.3		$	936.7		$	1,068.0
	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
(Loss) income before income taxes
Excess and Surplus Lines	$	19.5		$	15.3		$	40.8		$	43.5
Commercial Specialty		(1.6	)		11.9			(8.1	)		17.7
International Specialty		(13.3	)		8.4			(64.6	)		23.0
Syndicate 1200		(4.6	)		0.1			(47.9	)		(12.8	)
Run-off Lines		(5.8	)		(2.0	)		(2.0	)		1.9
Total segment (loss) income before taxes		(5.8	)		33.7			(81.8	)		73.3
Corporate and Other		(4.2	)		(11.4	)		(27.1	)		(4.9	)
Net realized investment and other gains		3.9			9.1			37.7			28.6
Total (loss) income before income taxes	$	(6.1	)	$	31.4		$	(71.2	)	$	97.0

Identifiable Assets

(in millions)	September 30, 2011		December 31, 2010
Excess and Surplus Lines	$	2,287.4	$	2,340.9
Commercial Specialty		1,271.8		1,300.0
International Specialty		684.3		500.2
Syndicate 1200		1,580.5		1,574.1
Run-off Lines		572.0		639.1
Corporate and Other		106.7		134.2
Total	$	6,502.7	$	6,488.5

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Net (Loss) Income Per Common Share (Net Income (Loss) Per Common Share On A Basic And Diluted Basis) (Details) (USD $) In Millions, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net (Loss) Income Per Common Share [Abstract]
Net (loss) income	$ (12.1)	$ 23.0	$ (83.8)	$ 69.8
Weighted average common shares outstanding-basic	27,237,788	29,504,900	27,374,953	29,998,803
Effect of dilutive securities Equity compensation awards	0	371,450	0	334,882
Weighted average common shares outstanding-diluted	27,237,788	29,876,350	27,374,953	30,333,685
Net (loss) income per common share - basic	$ (0.44)	$ 0.78	$ (3.06)	$ 2.33
Net (loss) income per common share - diluted	$ (0.44)	$ 0.77	$ (3.06)	$ 2.31

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Investments (Financial Assets Measured At Fair Value On A Recurring Basis II) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 4,180.3		$ 4,215.4
U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	516.9		440.8
U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	275.2	[1]	294.6	[1]
U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
U.S. Governments [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	516.9	[3]	440.8	[4]
Non-U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	43.2		6.4
Non-U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	43.2	[1]	6.4	[1]
Non-U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
Non-U.S. Governments [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	43.2		6.4
Obligations Of States And Political Subdivisions [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	625.2		653.3
Obligations Of States And Political Subdivisions [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	625.2	[1]	653.3	[1]
Obligations Of States And Political Subdivisions [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
Obligations Of States And Political Subdivisions [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	625.2		653.3
Credit-Financial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	393.0		381.1
Credit-Financial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	392.3	[1]	380.4	[1]
Credit-Financial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0.7	[2]	0.7	[2]
Credit-Financial [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	393.0		381.1
Credit-Industrial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	417.7		395.1
Credit-Industrial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	417.7	[1]	395.1	[1]
Credit-Industrial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
Credit-Industrial [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	417.7		395.1
Credit-Utility [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	169.6		170.8
Credit-Utility [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	169.6	[1]	170.8	[1]
Credit-Utility [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
Credit-Utility [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	169.6		170.8
CMO/MBS-Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	558.7		699.1
CMO/MBS-Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	558.7	[1]	699.1	[1]
CMO/MBS-Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
CMO/MBS-Agency [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	558.7	[5]	699.1	[5]
CMO/MBS-Non Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	20.8		38.3
CMO/MBS-Non Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	20.8	[1]	38.3	[1]
CMO/MBS-Non Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
CMO/MBS-Non Agency [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	20.8		38.3
CMBS [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	113.4		149.0
CMBS [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	113.4	[1]	149.0	[1]
CMBS [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
CMBS [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	113.4	[6]	149.0	[6]
ABS-Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	14.4		17.1
ABS-Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	14.4	[1]	17.1	[1]
ABS-Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
ABS-Residential [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	14.4	[7]	17.1	[7]
ABS-Non Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	71.4		130.1
ABS-Non Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	71.4	[1]	130.1	[1]
ABS-Non Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
ABS-Non Residential [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	71.4		130.1
Foreign Denominated, Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	220.4		206.7
Foreign Denominated, Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	220.4	[1]	206.7	[1]
Foreign Denominated, Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
Foreign Denominated, Governments [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	220.4		206.7
Foreign Denominated, Credit [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	94.3		73.6
Foreign Denominated, Credit [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	94.3	[1]	73.6	[1]
Foreign Denominated, Credit [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
Foreign Denominated, Credit [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	94.3		73.6
Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	353.1		324.5
Equity Securities [Member] | Available-For-Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	353.1		324.5
Equity Securities [Member] | Available-For-Sale [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	49.9	[1]	50.2	[1]
Equity Securities [Member] | Available-For-Sale [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	10.5	[2]	21.0	[2]
Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	214.1		154.2
Other Investments [Member] | Available-For-Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	102.0		91.0
Other Investments [Member] | Available-For-Sale [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	102.0	[1]	91.0	[1]
Other Investments [Member] | Available-For-Sale [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
Short-Term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	354.1		375.3
Short-Term Investments [Member] | Available-For-Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	354.1		375.3
Short-Term Investments [Member] | Available-For-Sale [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	12.4	[1]	6.3	[1]
Short-Term Investments [Member] | Available-For-Sale [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[2]	0	[2]
Available-For-Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	4,068.2		4,152.2
Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	3,259.0		3,361.4
Available-For-Sale [Member] | Fixed Maturities [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	3,016.6	[1]	3,214.5	[1]
Available-For-Sale [Member] | Fixed Maturities [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0.7	[2]	0.7	[2]
Available-For-Sale [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	3,180.9	[1]	3,362.0	[1]
Available-For-Sale [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	11.2	[2]	21.7	[2]
Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 3,259.0		$ 3,361.4

[1] Significant other observable inputs

[2] Significant unobservable inputs

[3] Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $72.3 million amortized cost, $73.2 million fair value.

[4] Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $87.7 million amortized cost, $89.3 million fair value.

[5] Collateralized mortgage obligations/mortgage-backed securities ("CMO/MBS").

[6] Commercial mortgage-backed securities ("CMBS").

[7] Asset-backed securities ("ABS").

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Reserves For Losses And Loss Adjustment Expenses (Tables)

9 Months Ended

Sep. 30, 2011

Reserves For Losses And Loss Adjustment Expenses [Abstract]

Reinsurance Recoverables

	For the Nine Months Ended September 30,
(in millions)	2011		2010
Net beginning of the year	$	2,253.0	$	2,213.2
Add:
Losses and LAE incurred during current calendar year, net of reinsurance:
Current accident year		662.8		631.7
Prior accident years		1.6		(26.8	)
Losses and LAE incurred during calendar year, net of reinsurance		664.4		604.9
Deduct:
Losses and LAE payments made during current calendar year, net of reinsurance:
Current accident year		153.2		129.3
Prior accident years		417.1		445.6
Losses and LAE payments made during current calendar year, net of reinsurance:		570.3		574.9
Additional participation interest (1)		31.2		44.6
Foreign exchange adjustments		12.0		(11.9	)
Net reserves - end of period		2,390.3		2,275.9
Add:
Reinsurance recoverable on unpaid losses and LAE, end of period		959.3		954.3
Gross reserves - end of period	$	3,349.6	$	3,230.2

⁽¹⁾  Amount represents additional reserves due to increased syndicate participation.

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Segment Information

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Segment Information

11. Segment Information

We are primarily engaged in writing property and casualty insurance and reinsurance. We have four ongoing reporting segments: Excess and Surplus Lines, Commercial Specialty, International Specialty (formerly Reinsurance) and Syndicate 1200 (formerly International Specialty). Additionally, we have a Run-off Lines segment for certain products that we no longer write. See Note 1, "Basis of Presentation," for additional information on the changes of the segment names.

As a result of a group reinsurance coverage entered into in June 2011 through a catastrophe bond issuance in the Insurance Linked Securities market, for the three and nine months ended September 30, 2011, we have recorded $0 and $16.3 million, respectively, in ceded written premium and have recognized $2.7 million and $3.1 million, respectively, in ceded earned premiums in the Corporate and Other segment.

We consider many factors, including the nature of each segment's insurance and reinsurance products, production sources, distribution strategies and the regulatory environment, in determining how to aggregate reporting segments.

In evaluating the operating performance of our segments, we focus on core underwriting and investing results before the consideration of realized gains or losses from the sales of investments. Realized investment and other gains (losses) are reported as a component of the Corporate and Other segment, as decisions regarding the acquisition and disposal of securities reside with our executive management and are not under the control of the individual business segments. Identifiable assets by segment are those assets used in the operation of each segment.

Revenue and (loss) income before income taxes for each segment for the three and nine months ended September 30, 2011 and 2010 were as follows:

	For the Three  Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Revenue:
Earned premiums
Excess and Surplus Lines	$	99.4		$	122.2		$	305.6		$	376.0
Commercial Specialty		82.9			81.6			233.7			254.2
International Specialty		21.4			24.8			76.2			74.7
Syndicate 1200		67.3			60.7			188.2			232.2
Run-off Lines		(0.1	)		(0.4	)		0.3			(0.2	)
Corporate and Other		(2.7	)		0.0			(3.1	)		0.0
Total earned premiums		268.2			288.9			800.9			936.9
Net investment income
Excess and Surplus Lines		13.2			14.4			42.4			43.7
Commercial Specialty		6.6			7.2			21.0			22.1
International Specialty		2.6			2.4			8.5			6.4
Syndicate 1200		4.3			3.9			13.3			10.6
Run-off Lines		3.1			4.3			10.4			13.4
Corporate and Other		0.2			1.4			0.7			4.3
Total net investment income		30.0			33.6			96.3			100.5
Fee income, net		1.4			1.7			1.8			2.0
Net realized investment and other gains		3.9			9.1			37.7			28.6
Total revenue	$	303.5		$	333.3		$	936.7		$	1,068.0
	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
(Loss) income before income taxes
Excess and Surplus Lines	$	19.5		$	15.3		$	40.8		$	43.5
Commercial Specialty		(1.6	)		11.9			(8.1	)		17.7
International Specialty		(13.3	)		8.4			(64.6	)		23.0
Syndicate 1200		(4.6	)		0.1			(47.9	)		(12.8	)
Run-off Lines		(5.8	)		(2.0	)		(2.0	)		1.9
Total segment (loss) income before taxes		(5.8	)		33.7			(81.8	)		73.3
Corporate and Other		(4.2	)		(11.4	)		(27.1	)		(4.9	)
Net realized investment and other gains		3.9			9.1			37.7			28.6
Total (loss) income before income taxes	$	(6.1	)	$	31.4		$	(71.2	)	$	97.0

The following table represents identifiable assets as of September 30, 2011 and December 31, 2010:

(in millions)	September 30, 2011		December 31, 2010
Excess and Surplus Lines	$	2,287.4	$	2,340.9
Commercial Specialty		1,271.8		1,300.0
International Specialty		684.3		500.2
Syndicate 1200		1,580.5		1,574.1
Run-off Lines		572.0		639.1
Corporate and Other		106.7		134.2
Total	$	6,502.7	$	6,488.5

Included in the Syndicate 1200 segment (formerly the International Specialty segment) at September 30, 2011 and December 31, 2010 are $530.5 million and $651.8 million, respectively, in assets associated with trade capital providers.

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Recently Issued Accounting Standards

9 Months Ended

Sep. 30, 2011

Recently Issued Accounting Standards [Abstract]

Recently Issued Accounting Standards

2. Recently Issued Accounting Standards

In October 2010, the Financial Accounting Standards Board ("FASB") issued an accounting update that amends the guidance in the FASB Accounting Standards Codification Topic 944, entitled "Financial Services – Insurance." The amendments in the update modify the definition of the types of costs incurred by insurance entities that can be capitalized in the acquisition of new and renewal contracts. The amendments in this update are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2011. The amendments in this update are to be applied prospectively upon adoption. Retrospective application to all prior periods presented upon the date of adoption also is permitted, but not required. We expect to apply the retrospective application of this standard upon adoption and, therefore, will revise the income statements presented, with a cumulative adjustment to retained earnings. Based on our initial evaluation of this update, we anticipate that upon adoption we will record an adjustment to retained earnings between $30.0 million to $35.0 million.

In May 2011, the FASB issued amendments to "Fair Value Measurement" (Topic 820). The amendments were to achieve common fair value measurement and disclosure requirements in GAAP and International Financial Reporting Standards. Some of the amendments clarify the FASB's intent about the application of existing fair value measurement requirements. Other amendments change a particular principle or requirement for measuring fair value or for disclosing information about fair value measurements. There are changes to how premiums and discounts are applied. There are clarifications made to principal market determination. The amendments also clarify that the highest and best use and valuation premise concepts are not applicable to financial instruments. There are amendments that indicate how a company should determine the fair value of its own equity instruments and the fair value of liabilities. New disclosures, with a particular focus on Level 3 measurement, are required. All transfers between Level 1 and Level 2 will now be required to be disclosed. Information about when the current use of a non-financial asset measured at fair value differs from its highest and best use is to be disclosed. The amendments in this update are to be applied prospectively. The amendments are effective during interim and annual periods beginning after December 15, 2011. Early application is not permitted. We are currently evaluating this update to determine the potential impact, if any, the adoption may have on our financial results and disclosures.

In June 2011, the FASB issued amendments to the presentation of comprehensive income. The amendments eliminate the option to present components of other comprehensive income as part of the statement of changes in shareholders' equity. The amendment provides the option to present other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. Both options require the presentation of each component of net income along with the total net income, each component of other comprehensive income along with a total for other comprehensive income, and a total amount for comprehensive income. The components of other comprehensive income have not changed, nor has the guidance on when other comprehensive income items are reclassified to net income. All reclassification adjustments from other comprehensive income to net income are required to be presented on the face of the statement of comprehensive income. The amendments in this update are to be applied prospectively. Early application is permitted. The amendments are effective during interim and annual periods beginning after December 15, 2011. This update will have no impact on our Consolidated Statement of Comprehensive (Loss) Income, but may have an impact on other disclosures or financial statement presentation.

In December 2010, the FASB issued an accounting update that amends the guidance for goodwill impairment testing for reporting units with a zero or negative carrying amount. For those reporting units, an entity is required to perform Step 2 of the goodwill impairment test if it is more likely than not that goodwill impairment exists. In determining whether it is more likely than not that goodwill impairment exists, an entity should consider whether there are any adverse qualitative factors indicating that impairment may exist. The qualitative factors are consistent with the existing guidance and examples provided in codification, which requires that goodwill of a reporting unit be tested for impairment between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The amendments in this update are effective for fiscal years, and interim periods within those years, beginning after December 15, 2010. Upon adoption of the amendments, if the entity determines that it is more likely than not that the goodwill of one or more of its reporting units is impaired, the entity should perform Step 2 of the goodwill impairment test for those reporting units. Any resulting goodwill impairment should be recorded as a cumulative-effect adjustment to beginning retained earnings in the period of adoption. Any goodwill impairments occurring after the initial adoption of the amendments should be included in earnings. Since adoption, this update has had no impact on our financial results and disclosures.

In September 2011, the FASB issued an accounting update to simplify how entities test goodwill for impairment. The amendments permit an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test described in Topic 350, "Intangibles – Goodwill and Other." The more-likely-than-not threshold is defined as having a likelihood of more than 50 percent. Previous guidance required an entity to test goodwill for impairment on at least an annual basis by comparing the fair value of a reporting unit with its carrying amount, including goodwill (step one). If the fair value of a reporting unit is less than its carrying amount, then the second step of the test must be performed to measure the amount of the impairment loss, if any. Under the amendments of the update, an entity is not required to calculate the fair value of a reporting unit unless the entity determines that it is more likely than not that its fair value is less than its carrying amount. The amendments are effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. Early adoption is permitted, including for annual and interim goodwill impairment tests performed as of a date before September 15, 2011, if an entity's financial statements for the most recent annual or interim period have not yet been issued or, for nonpublic entities, have not yet been made available for issuance. We are currently evaluating this update to determine the potential impact, if any, the adoption may have on our financial results and disclosures.

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Investments (Schedule Of The Company's Gross Realized Investment And Other Gains (Losses)) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Schedule of Investments [Line Items]
Gross realized gains	$ 13.2	$ 11.4	$ 53.8	$ 38.3
Gross realized losses	(9.3)	(2.3)	(16.1)	(9.7)
Net realized investment and other gains	3.9	9.1	37.7	28.6
Equity Securities [Member]
Schedule of Investments [Line Items]
Gross realized gains	0.9	0.9	15.7	4.4
Gross realized losses	0	(0.2)	(0.7)	(1.1)
Other-than-temporary impairment losses	(1.1)	0	(1.1)	0
Short-Term And Other Investments [Member]
Schedule of Investments [Line Items]
Gross realized gains	3.9	5.2	12.6	6.9
Gross realized losses	(5.6)	(0.1)	(7.4)	(0.4)
Fixed Maturities [Member]
Schedule of Investments [Line Items]
Gross realized gains	8.4	5.3	25.5	27.0
Gross realized losses	(2.5)	(2.0)	(6.8)	(7.4)
Other-than-temporary impairment losses	$ (0.1)	$ 0	$ (0.1)	$ (0.8)

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Equity-Based Compensation

9 Months Ended

Sep. 30, 2011

Equity-Based Compensation [Abstract]

Equity-Based Compensation

8. Equity-based Compensation

The fair value method of accounting is used for equity-based compensation plans. Under the fair value method, compensation cost is measured based on the fair value of the award at the measurement date and recognized over the requisite service period. We use the Black-Scholes model to estimate the fair values on the measurement date for share options and share appreciation rights ("SARs"). The Black-Scholes model uses several assumptions to value a share award. The volatility assumption is based on the historical change in Argo Group's stock price over the previous five years preceding the measurement date. The risk-free rate of return assumption is based on the five-year U.S. Treasury constant maturity rate on the measurement date. The expected award life is based upon the average holding period over the history of the incentive plan. The following table summarizes the assumptions we used for the nine months ended September 30, 2011 and 2010:

	2011	2010
Risk-free rate of return	0.89% to 2.07%	1.34% to 2.65%
Expected dividend yields	1.37% to 1.54%	1.55% to 1.65%
Expected award life (years)	5.04 to 5.07	1.00 to 5.06
Expected volatility	32.1% to 32.5%	31.3% to 31.8%

Argo Group's 2007 Long-Term Incentive Plan

In November 2007, the shareholders of Argo Group approved the 2007 Long-Term Incentive Plan (the "2007 Plan"), which provides for an aggregate of 4.5 million shares of our common stock that may be issued to certain executives and other key employees. The share awards may be in the form of share options, SARs, restricted shares, restricted share units, performance units, performance shares or other share-based incentive awards. Shares issued under this plan may be shares that are authorized and unissued or shares that we reacquired, including shares purchased on the open market. Share options and SARs will count as one share for the purposes of the limits under the 2007 Plan; restricted shares, restricted share units, performance units, performance shares or other share-based incentive awards which settle in common shares will count as 2.75 shares for purpose of the limits under the 2007 Plan.

Share options may be in the form of incentive share options, non-qualified share options and restorative options. Share options are required to have an exercise price that is not less than the market value on the date of grant. We are prohibited from repricing the options. The term of the share options cannot exceed seven years from the grant date.

A summary of option activity under the 2007 Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		447,603		$	36.28
Granted		84		$	39.19
Exercised		(3,104	)	$	35.23
Expired or forfeited		(31,504	)	$	36.96
Outstanding at September 30, 2011		413,079		$	36.69

Options outstanding under this plan vest over a one to five year period, subject to continued employment. Expense recognized under this plan for share options was $0.9 million for each of the nine months ended September 30, 2011 and 2010. Compensation expense from all equity-based compensation awards is included in "Underwriting, acquisition and insurance expense" in the accompanying Consolidated Statements of (Loss) Income. For the nine months ended September 30, 2011, cash payments received related to the settlement of options exercised under the 2007 Plan (net of any related tax payments) were not significant. Unamortized expense for these options was $0.8 million as of September 30, 2011.

A summary of restricted share activity under the 2007 Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Grant Date Fair Value
Outstanding at January 1, 2011		102,243		$	30.11
Granted		91,775		$	32.53
Vested and issued		(29,124	)	$	32.81
Expired or forfeited		(17,557	)	$	31.80
Outstanding at September 30, 2011		147,337		$	31.94

The restricted shares will vest over three to five years. Expense recognized under this plan for the restricted shares was $1.1 million and $0.9 million for the nine months ended September 30, 2011 and 2010, respectively. As of September 30, 2011, there was $3.8 million of total unrecognized compensation cost related to restricted shares.

A summary of stock-settled SARs activity under the 2007 Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		630,947		$	28.22
Granted		403,518		$	32.50
Exercised		(13,397	)	$	28.38
Expired or forfeited		(162,560	)	$	28.74
Outstanding at September 30, 2011		858,508		$	30.13

The stock-settled SARs vest over a two to five year period. Upon exercise of the stock-settled SARs, the employee is entitled to receive shares of Argo Group's common stock equal to the appreciation of the stock as compared to the exercise price. Expense recognized for the stock-settled SARs was $1.0 million and $1.2 million for the nine months ended September 30, 2011 and 2010, respectively. As of September 30, 2011, there was $4.7 million of total unrecognized compensation cost related to stock-settled SARs.

A summary of cash-settled SARs activity under the 2007 Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		659,224		$	28.25
Granted		563,709		$	32.48
Exercised		(20,339	)	$	28.07
Expired or forfeited		(127,659	)	$	29.12
Outstanding at September 30, 2011		1,074,935		$	30.37

The cash-settled SARs vest over a two to four year period. Upon exercise of the cash-settled SARs, the employee is entitled to receive cash payment for the appreciation in the value of our common stock over the exercise price. We are accounting for the cash-settled SARs as liability awards, which require the awards to be re-valued at each reporting period. Due to the decline in our stock price from December 31, 2010 to September 30, 2011, the revaluation of the cash-settled SARs resulted in a $1.3 million reduction to expense. Expense recognized for the cash-settled SARs totaled $1.9 million for the nine months ended September 30, 2010. As of September 30, 2011, there was $3.0 million of total unrecognized compensation cost related to cash-settled SARs.

Argo Group's 2008 Deferred Compensation Plan for Non-Employee Directors

In February 2008, the Board of Directors approved the Argo Group International Holdings, Ltd. Deferred Compensation Plan for Non-Employee Directors, a non-funded and non-qualified deferred compensation plan. Under the Plan, non-employee directors can elect each year to defer payment of 50% or 100% of their cash compensation payable during the next calendar year. During the time that the cash compensation amounts are deferred, such amounts are credited with interest earned at a rate two (2) percent above the prime rate, to be re-set each May 1. In addition, the Plan calls for us to grant a match equal to 75% of the cash compensation amounts deferred in the form of "Stock Units," which provide directors with the economic equivalent of stock ownership and are credited as a bookkeeping entry to each director's "Stock Unit Account." Each Stock Unit is valued at the closing price of our common stock on the national exchange on which it is listed as of the date credited for all purposes under the Plan and fluctuates daily thereafter on that same basis. Distributions from the Plan will occur six months after the non-employee director ceases to be a member of the Board due to retirement or termination without cause or change in control, or immediately upon disability or death. The non-employee directors are responsible for all tax requirements on the deferred compensation and any related earnings. The Plan provides for a Stock Unit Account to be established for each non-employee director upon their election to the Board and credits their account with an initial bookkeeping entry for 1,650 Stock Units. Under this plan, we recorded compensation expense of $0.4 million and $0.6 million for the nine months ended September 30, 2011 and 2010, respectively.

Argonaut Group's Share-Based Payment Plans

Argonaut Group, Inc.'s Amended and Restated Stock Incentive Plan, as approved by the shareholders (the "Amended Plan"), provided for an aggregate of up to 6,250,000 shares of our common stock that may be issued to certain executives and other key employees. The stock awards were issued in the form of non-qualified stock options and non-vested stock.

A summary of option activity under the Amended Plan as of September 30, 2011, and changes during the nine months then ended are as follows:

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		459,434		$	36.80
Granted		0		$	0.00
Exercised		(9,808	)	$	29.25
Expired or forfeited		(34,093	)	$	49.17
Outstanding at September 30, 2011		415,533		$	35.97

The compensation expense recorded for options outstanding was $0.2 million and $0.4 million for the nine months ended September 30, 2011 and 2010, respectively. For the nine months ended September 30, 2011, we received cash payments of $0.3 million (net of any related tax payments) related to the settlement of options exercised under the Amended Plan. The options granted under the Amended Plan were fully vested in August 2011.

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Disclosures About Fair Value Of Financial Instruments

9 Months Ended

Sep. 30, 2011

Disclosures About Fair Value Of Financial Instruments [Abstract]

Disclosures About Fair Value Of Financial Instruments

13. Disclosures about Fair Value of Financial Instruments

Cash. The carrying amount approximates fair value.

Investment securities and short-term investments. See Note 3, "Investments," for additional information.

Premiums receivable and reinsurance recoverables on paid losses. The carrying value of current receivables approximates fair value. At September 30, 2011 and December 31, 2010, the carrying values of premiums receivable over 90 days were $18.6 million and $18.9 million, respectively. Included in "Reinsurance recoverables" in the Consolidated Balance Sheets at September 30, 2011 and December 31, 2010, are amounts that are due from third party trade capital providers associated with the operations of Argo Underwriting Agency Limited ("Argo International"). Upon settlement, the receivable is offset against the liability also reflected in the accompanying Consolidated Balance Sheets. At September 30, 2011 and December 31, 2010, the payable was in excess of the receivable. Of our paid losses on reinsurance recoverable balances, excluding amounts attributable to Argo International's third party trade capital providers, at September 30, 2011 and December 31, 2010, the carrying values over 90 days were $20.6 million and $28.7 million, respectively. Our methodology for establishing our allowances for doubtful accounts includes specifically identifying all potential uncollectible balances regardless of aging. Any of the over 90 day balances, where collectibility was deemed questionable, have been included in the allowances. At September 30, 2011 and December 31, 2010, the allowance for doubtful accounts for premiums receivable was $2.9 million and $4.6 million, respectively, and the allowance for doubtful accounts for reinsurance recoverables on paid losses was $3.1 million and $11.1 million, respectively. Premiums receivable over 90 days were secured by collateral in the amount of $0.2 million and $0.4 million at September 30, 2011 and December 31, 2010, respectively. Reinsurance recoverables on paid losses over 90 days were secured by collateral in the amount of $0.2 million and $0.4 million at September 30, 2011 and December 31, 2010, respectively.

Long-term debt. At September 30, 2011 and December 31, 2010, the fair value of our Junior Subordinated Debentures was estimated using quoted prices from external sources based on current market conditions.

Other indebtedness. At September 30, 2011 and December 31, 2010, the fair value of our Other Indebtedness was estimated using quoted prices from external sources based on current market conditions.

A summary of our financial instruments whose carrying value did not equal fair value at September 30, 2011 and December 31, 2010 is shown below:

	September 30, 2011				December 31, 2010
(in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Junior subordinated debentures	$	311.5	$	250.0	$	311.5	$	238.6
Other indebtedness:
Floating rate loan stock		66.1		48.0		64.2		44.3
Note payable		0.8		0.6		0.8		0.5
	$	378.4	$	298.6	$	376.5	$	283.4

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Reserves For Losses And Loss Adjustment Expenses

9 Months Ended

Sep. 30, 2011

Reserves For Losses And Loss Adjustment Expenses [Abstract]

Reserves For Losses And Loss Adjustment Expenses

9. Reserves for Losses and Loss Adjustment Expenses

The following table provides a reconciliation of reserves for losses and loss adjustment expenses ("LAE"), net of reinsurance, to the gross amounts reported in the Consolidated Balance Sheets. Reinsurance recoverables in this note exclude paid loss recoverables of $147.7 million and $241.0 million as of September 30, 2011 and 2010, respectively:

	For the Nine Months Ended September 30,
(in millions)	2011		2010
Net beginning of the year	$	2,253.0	$	2,213.2
Add:
Losses and LAE incurred during current calendar year, net of reinsurance:
Current accident year		662.8		631.7
Prior accident years		1.6		(26.8	)
Losses and LAE incurred during calendar year, net of reinsurance		664.4		604.9
Deduct:
Losses and LAE payments made during current calendar year, net of reinsurance:
Current accident year		153.2		129.3
Prior accident years		417.1		445.6
Losses and LAE payments made during current calendar year, net of reinsurance:		570.3		574.9
Additional participation interest (1)		31.2		44.6
Foreign exchange adjustments		12.0		(11.9	)
Net reserves - end of period		2,390.3		2,275.9
Add:
Reinsurance recoverable on unpaid losses and LAE, end of period		959.3		954.3
Gross reserves - end of period	$	3,349.6	$	3,230.2

⁽¹⁾  Amount represents additional reserves due to increased syndicate participation.

Included in losses and LAE for the nine months ended September 30, 2011 was $1.6 million in unfavorable prior years' loss reserve development comprised of the following: $17.8 million of favorable development in the Excess and Surplus Lines segment resulting from $13.2 million of favorable development in the general and products liability lines of business, $3.4 million of favorable development in the automobile liability lines of business and $1.2 million of favorable development primarily in the professional liability and property lines of business; $4.7 million of net unfavorable development in the Commercial Specialty segment primarily driven by $12.1 million of unfavorable development in general liability due primarily to increases in claim severity, partially offset by $4.1 million of favorable development in workers compensation and $3.7 million of favorable development in an assumed Directors and Officers program; $3.6 million of net favorable development in the International Specialty segment (formerly the Reinsurance segment) comprised of $3.9 million of favorable development attributable to short-tail non-catastrophe losses, $1.1 million of favorable development related to 2005 Hurricanes Ike and Gustav, partially offset by $1.4 million of unfavorable development attributable to the 2010 New Zealand earthquake; $14.8 million of unfavorable development in the Syndicate 1200 segment (formerly the International Specialty segment) primarily attributable to $10.1 million of unfavorable development in the liability lines of business driven by deterioration in the professional indemnity and general liability classes of business related to a small number of specific claims and a reduction in the estimate of future reinsurance recoveries, coupled with $4.6 million of unfavorable development related to property lines of business where the claims experience was worse than expected; and $3.5 million of net unfavorable development in the Run-off Lines segment primarily due to $11.7 million of unfavorable development in asbestos and environmental lines, partially offset by the collection of a contribution settlement from another insurer for a California workers compensation indemnity claim, and favorable development in other lines. The asbestos and environmental unfavorable development is primarily attributable to $8.2 million for asbestos losses driven by increasing severities, defense costs and the settlement of a disputed reinsurance recoverable matter, and $3.5 million for environmental losses driven by one significant enviromental loss.

Included in losses and LAE for the nine months ended September 30, 2010 was $26.8 million in favorable prior years' loss reserve development comprised of the following: $9.3 million of net favorable development in the Excess and Surplus Lines segment resulting from $9.5 million of favorable development related to casualty and professional liability lines of business partially offset by $0.2 million of unfavorable development related to property lines of business; $5.4 million of net favorable development in the Commercial Specialty segment resulting from favorable development primarily in workers compensation and property lines of business partially offset by unfavorable development in liabilty lines of business; $14.5 million of favorable development in the International Specialty segment (formerly the Reinsurance segment) comprising $12.2 million attributable to short-tail non-catastrophe losses, $1.1 million attributable to 2005 Hurricanes Ike and Gustav, and $1.2 million related to other assumed programs; $2.7 million of net unfavorable development in the Syndicate 1200 segment (formerly the International Specialty segment) attributable to $11.6 million unfavorable development related to liability lines of business partially offset by $8.9 million favorable development related to property lines of business; and $0.3 million of net favorable development in the Run-off Lines segment due to $8.2 million of favorable development related to risk management run-off reserves and $1.6 million of favorable development on legacy PXRE claims, partially offset by $9.5 million of unfavorable development in asbestos and environmental lines.

In the opinion of management, our reserves represent the best estimate of our ultimate liabilities, based on currently known facts, current law, current technology and assumptions considered reasonable where facts are not known. Due to the significant uncertainties and related management judgments, there can be no assurance that future loss development, favorable or unfavorable, will not occur.

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Investments (Schedule Of Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses And Fair Value Of Investments) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 3,994.3		$ 3,987.9
Gross Unrealized Gains	240.3		247.2
Gross Unrealized Losses	54.3		19.7
Fair value	4,180.3		4,215.4
U.S. Governments [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	502.7	[1]	430.3	[2]
Gross Unrealized Gains	14.3	[1]	11.3	[2]
Gross Unrealized Losses	0.1	[1]	0.8	[2]
Fair value	516.9	[1]	440.8	[2]
U.S. Governments [Member] | Corporate Bonds Backed By The Federal Deposit Insurance Corporation [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value	73.2		89.3
Amortized cost	72.3		87.7
Non-U.S. Governments [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	45.4		6.2
Gross Unrealized Gains	0.3		0.2
Gross Unrealized Losses	2.5		0
Fair value	43.2		6.4
Obligations Of States And Political Subdivisions [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	584.9		630.6
Gross Unrealized Gains	41.0		25.6
Gross Unrealized Losses	0.7		2.9
Fair value	625.2		653.3
Credit-Financial [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	389.3		370.5
Gross Unrealized Gains	10.3		12.3
Gross Unrealized Losses	6.6		1.7
Fair value	393.0		381.1
Credit-Industrial [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	406.4		378.3
Gross Unrealized Gains	17.9		17.6
Gross Unrealized Losses	6.6		0.8
Fair value	417.7		395.1
Credit-Utility [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	165.4		164.8
Gross Unrealized Gains	6.5		6.4
Gross Unrealized Losses	2.3		0.4
Fair value	169.6		170.8
CMO/MBS-Agency [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	525.1	[3]	665.7	[3]
Gross Unrealized Gains	33.8	[3]	33.9	[3]
Gross Unrealized Losses	0.2	[3]	0.5	[3]
Fair value	558.7	[3]	699.1	[3]
CMO/MBS-Non Agency [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20.7		37.4
Gross Unrealized Gains	0.8		1.5
Gross Unrealized Losses	0.7		0.6
Fair value	20.8		38.3
CMBS [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	108.8	[4]	143.6	[4]
Gross Unrealized Gains	4.9	[4]	6.3	[4]
Gross Unrealized Losses	0.3	[4]	0.9	[4]
Fair value	113.4	[4]	149.0	[4]
ABS-Residential [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	16.3	[5]	19.3	[5]
Gross Unrealized Gains	0.1	[5]	0.1	[5]
Gross Unrealized Losses	2.0	[5]	2.3	[5]
Fair value	14.4	[5]	17.1	[5]
ABS-Non Residential [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	70.1		127.7
Gross Unrealized Gains	1.3		2.4
Gross Unrealized Losses	0		0
Fair value	71.4		130.1
Foreign Denominated, Governments [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	221.8		202.1
Gross Unrealized Gains	7.6		9.5
Gross Unrealized Losses	9.0		4.9
Fair value	220.4		206.7
Foreign Denominated, Credit [Member] | Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	97.1		73.9
Gross Unrealized Gains	2.3		2.8
Gross Unrealized Losses	5.1		3.1
Fair value	94.3		73.6
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	267.9		208.8
Gross Unrealized Gains	98.5		116.5
Gross Unrealized Losses	13.3		0.8
Fair value	353.1		324.5
Other Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	217.7		153.5
Gross Unrealized Gains	0.7		0.7
Gross Unrealized Losses	4.3		0
Fair value	214.1		154.2
Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	354.7		375.2
Gross Unrealized Gains	0		0.1
Gross Unrealized Losses	0.6		0
Fair value	354.1		375.3
Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,154.0		3,250.4
Gross Unrealized Gains	141.1		129.9
Gross Unrealized Losses	36.1		18.9
Fair value	$ 3,259.0		$ 3,361.4

[1] Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $72.3 million amortized cost, $73.2 million fair value.

[2] Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $87.7 million amortized cost, $89.3 million fair value.

[3] Collateralized mortgage obligations/mortgage-backed securities ("CMO/MBS").

[4] Commercial mortgage-backed securities ("CMBS").

[5] Asset-backed securities ("ABS").

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Income Taxes

9 Months Ended

Sep. 30, 2011

Income Taxes [Abstract]

Income Taxes

7.    Income Taxes

We are incorporated under the laws of Bermuda and, under current Bermuda law, are not obligated to pay any taxes in Bermuda based upon income or capital gains. We have received an undertaking from the Supervisor of Insurance in Bermuda pursuant to the provisions of the Exempted Undertakings Tax Protection Amendment Act, 2011, which exempts us from any Bermuda taxes computed on profits, income or any capital asset, gain or appreciation, or any tax in the nature of estate duty or inheritance tax, at least until the year 2035.

We do not consider ourselves to be engaged in a trade or business in the United States or the United Kingdom and, accordingly, do not expect to be subject to direct United States or United Kingdom income taxation.

We have subsidiaries based in the United Kingdom that are subject to the tax laws of that country. Under current law, these subsidiaries are taxed at the applicable corporate tax rates. Six of the United Kingdom subsidiaries are deemed to be engaged in business in the United States and are therefore subject to United States corporate tax in respect of a proportion of their United States underwriting business only. Relief is available against the United Kingdom tax liabilities in respect of overseas taxes paid that arise from the underwriting business. Corporate income tax losses incurred in the United Kingdom can be carried forward, for application against future income, indefinitely. Our United Kingdom subsidiaries file separate United Kingdom income tax returns.

We have subsidiaries based in the United States that are subject to the tax laws of that country. Under current law, these subsidiaries are taxed at the applicable corporate tax rates. Our United States subsidiaries file a consolidated United States federal income tax return.

We also have operations in Belgium, Switzerland, Brazil, France and Ireland, which also are subject to income taxes imposed by the jurisdiction in which they operate. We have operations in the United Arab Emirates, which are not subject to income tax under the laws of that country.

Our income tax provision includes the following components:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Current tax provision	$	2.6		$	12.9		$	3.0		$	31.9
Deferred tax provision (benefit) related to:
Future tax deductions		3.6			(4.3	)		10.3			(4.0	)
Valuation allowance change		(0.2	)		(0.2	)		(0.7	)		(0.7	)
Income tax provision	$	6.0		$	8.4		$	12.6		$	27.2

Our expected income tax provision computed on pre-tax income (loss) at the weighted average tax rate has been calculated as the sum of the pre-tax income (loss) in each jurisdiction multiplied by that jurisdiction's applicable statutory tax rate.

A reconciliation of the difference between the provision for income taxes and the expected tax provision at the weighted average tax rate for the three and nine months ended September 30, 2011 and 2010 is as follows:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Income tax provision at expected rate	$	6.7		$	9.3		$	16.5		$	33.5
Tax effect of:
Tax-exempt interest		(1.4	)		(1.4	)		(4.3	)		(4.6	)
Dividends received deduction		(0.1	)		(0.4	)		(1.2	)		(1.1	)
Valuation allowance change		(0.2	)		(0.2	)		(0.7	)		(0.7	)
Other permanent adjustments, net		0.8			1.0			1.7			1.1
Adjustment for 2009 tax return		0.0			1.3			0.0			1.3
Adjustment for annualized rate		0.9			0.1			(0.1	)		(0.7	)
United States state tax expense (benefit)		0.1			0.3			(0.3	)		0.2
Prior year foreign taxes recovered		(0.3	)		0.0			(0.3	)		0.0
Deferred tax rate reduction		(0.1	)		0.0			(0.1	)		0.0
Other foreign adjustments		0.0			0.1			0.0			0.2
Foreign exchange adjustments		(0.4	)		(1.7	)		1.4			(2.0	)
Income tax provision	$	6.0		$	8.4		$	12.6		$	27.2

Our net deferred tax assets (liabilities) are supported by taxes paid in previous periods, the reversal of the taxable temporary differences and the recognition of future income. Management regularly evaluates the recoverability of the deferred tax assets and makes any necessary adjustments to them based upon any changes in management's expectations of future taxable income. Realization of deferred tax assets is dependent upon our generation of sufficient taxable income in the future to recover tax benefits that cannot be recovered from taxes paid in the carryback period, which is generally two years for net operating losses and three years for capital losses. At September 30, 2011, we had a total net deferred tax asset of $39.2 million prior to any valuation allowance. Management has concluded that a valuation allowance is required for a portion of the tax effected net capital loss carryforward of $31.9 million generated from the sale of PXRE Reinsurance Company, and a full valuation allowance is required for the tax effected net operating loss carryforward of $18.7 million from PXRE Corporation. Of the PXRE loss carryforwards, $17.2 million will expire if not utilized by December 31, 2025 and $1.5 million will expire if not utilized by December 31, 2027. The valuation allowances have been established as Internal Revenue Code Section 382 limits the utilization of net operating loss and net capital loss carryforwards following an ownership change. Accordingly, a valuation allowance of $48.6 million is required. The loss carryforwards available to utilize per year are $2.8 million as required by Internal Revenue Code Section 382. For the nine months ended September 30, 2011, the valuation allowance included in "Deferred tax liabilities, net" in the Consolidated Balance Sheet was reduced by $0.7 million pertaining to the utilization of the PXRE loss carryforwards and was increased by $0.7 million pertaining to the Brazil operations.

We have no material unrecognized tax benefits as of September 30, 2011. Tax years ended December 31, 2007 through December 31, 2010, as related to our United States subsidiaries, are open for examination by the Internal Revenue Service. Tax years ended December 31, 2008 through December 31, 2010 are open for examination by Her Majesty's Revenue and Customs in respect to our United Kingdom entities.

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Equity-Based Compensation (Summary Of Stock-Settled SARs Activity Under The 2007 Plan) (Details) (Stock-Settled SARs Activity [Member], USD $)	9 Months Ended
	Sep. 30, 2011
Stock-Settled SARs Activity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at January 1, 2011	630,947
Granted, Shares	403,518
Exercised, Shares	(13,397)
Expired or forfeited, Shares	(162,560)
Shares, Outstanding at September 30, 2011	858,508
Weighted-Average Exercise Price, Outstanding at January 1, 2011	$ 28.22
Granted, Weighted-Average Exercise Price	$ 32.50
Exercised, Weighted-Average Exercise Price	$ 28.38
Expired or forfeited, Weighted-Average Exercise Price	$ 28.74
Weighted-Average Exercise Price, Outstanding at September 30, 2011	$ 30.13

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Consolidated Statements Of Cash Flows (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net (loss) income	$ (83.8)	$ 69.8
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Amortization and depreciation	22.5	24.4
Share-based payments expense	2.5	6.7
Excess tax expense from share-based payment arrangements	0.1	0.3
Deferred income tax provision (benefit), net	9.6	(4.7)
Net realized investment gains	(31.3)	(28.6)
Loss on disposal of fixed assets, net	0.2	0
Change in:
Accrued investment income	2.0	(1.1)
Receivables	55.2	198.7
Deferred acquisition costs	3.5	25.4
Ceded unearned premiums	(63.7)	13.8
Reserves for losses and loss adjustment expenses	197.4	27.0
Unearned premiums	69.3	(53.9)
Ceded reinsurance payable and funds held	(93.8)	(216.9)
Income taxes	(10.4)	4.2
Accrued underwriting expenses	3.9	(15.9)
Sale of trading investment	0	2.1
Other, net	(18.1)	(21.8)
Cash provided by operating activities	65.1	29.5
Cash flows from investing activities:
Sales of fixed maturity investments	1,020.9	1,668.1
Maturities and mandatory calls of fixed maturity investments	296.7	324.5
Sales of equity securities	29.8	47.4
Sales of other investments	2.4	0.1
Purchases of fixed maturity investments	(1,199.1)	(1,877.8)
Purchases of equity securities	(75.5)	(16.7)
Purchases of other investments	(51.9)	(17.5)
Change in foreign regulatory deposits	(13.2)	(14.1)
Change in short-term investments	21.0	(5.9)
Purchases of fixed assets	(10.7)	(11.8)
Other, net	0.8	(2.0)
Cash provided by investing activities	21.2	94.3
Cash flows from financing activities:
Activity under stock incentive plans	0.9	1.6
Repurchase of Company's common shares	(35.9)	(66.2)
Excess tax expense from share-based payment arrangements	(0.1)	(0.3)
Payment of cash dividend to common shareholders	(10.0)	(10.8)
Cash used by financing activities	(45.1)	(75.7)
Effect of exchange rate changes on cash	(4.9)	0
Change in cash	36.3	48.1
Cash, beginning of period	83.5	18.1
Cash, end of period	$ 119.8	$ 66.2

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Investments

9 Months Ended

Sep. 30, 2011

Investments [Abstract]

Investments

3. Investments

Composition of Invested Assets

The amortized cost, gross unrealized gains, gross unrealized losses and fair value of investments as of September 30, 2011 and December 31, 2010 were as follows:

September 30, 2011	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in millions)
Fixed maturities
USD denominated:
U.S. Governments (1)	$	502.7	$	14.3	$	0.1	$	516.9
Non-U.S. Governments		45.4		0.3		2.5		43.2
Obligations of states and political subdivisions		584.9		41.0		0.7		625.2
Credit-Financial		389.3		10.3		6.6		393.0
Credit-Industrial		406.4		17.9		6.6		417.7
Credit-Utility		165.4		6.5		2.3		169.6
Structured securities:
CMO/MBS-agency (2)		525.1		33.8		0.2		558.7
CMO/MBS-non agency		20.7		0.8		0.7		20.8
CMBS (3)		108.8		4.9		0.3		113.4
ABS-residential (4)		16.3		0.1		2.0		14.4
ABS-non residential		70.1		1.3		0.0		71.4
Foreign denominated:
Governments		221.8		7.6		9.0		220.4
Credit		97.1		2.3		5.1		94.3
Total fixed maturities		3,154.0		141.1		36.1		3,259.0
Equity securities		267.9		98.5		13.3		353.1
Other investments		217.7		0.7		4.3		214.1
Short-term investments		354.7		0.0		0.6		354.1
Total investments	$	3,994.3	$	240.3	$	54.3	$	4,180.3

⁽¹⁾  Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $72.3 million amortized cost, $73.2 million fair value.

⁽²⁾ Collateralized mortgage obligations/mortgage-backed securities ("CMO/MBS").

⁽³⁾ Commercial mortgage-backed securities ("CMBS").

⁽⁴⁾ Asset-backed securities ("ABS").

December 31, 2010	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in millions)
Fixed maturities
USD denominated:
U.S. Governments (1)	$	430.3	$	11.3	$	0.8	$	440.8
Non-U.S. Governments		6.2		0.2		0.0		6.4
Obligations of states and political subdivisions		630.6		25.6		2.9		653.3
Credit-Financial		370.5		12.3		1.7		381.1
Credit-Industrial		378.3		17.6		0.8		395.1
Credit-Utility		164.8		6.4		0.4		170.8
Structured securities:
CMO/MBS-agency (2)		665.7		33.9		0.5		699.1
CMO/MBS-non agency		37.4		1.5		0.6		38.3
CMBS (3)		143.6		6.3		0.9		149.0
ABS-residential (4)		19.3		0.1		2.3		17.1
ABS-non residential		127.7		2.4		0.0		130.1
Foreign denominated:
Governments		202.1		9.5		4.9		206.7
Credit		73.9		2.8		3.1		73.6
Total fixed maturities		3,250.4		129.9		18.9		3,361.4
Equity securities		208.8		116.5		0.8		324.5
Other investments		153.5		0.7		0.0		154.2
Short-term investments		375.2		0.1		0.0		375.3
Total investments	$	3,987.9	$	247.2	$	19.7	$	4,215.4

⁽¹⁾  Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $87.7 million amortized cost, $89.3 million fair value.

⁽²⁾  Collateralized mortgage obligations/mortgage-backed securities ("CMO/MBS").

⁽³⁾ Commercial mortgage-backed securities ("CMBS").

⁽⁴⁾ Asset-backed securities ("ABS").

Included in total investments at September 30, 2011 and December 31, 2010 is $170.7 million and $170.4 million, respectively, of assets managed on behalf of the trade capital providers, who are third party capital participants that provide underwriting capital to our Syndicate 1200 segment (formerly the International Specialty segment).

Contractual Maturity

The amortized cost and fair values of fixed maturity investments as of September 30, 2011, by contractual maturity, were as follows:

(in millions)	Amortized Cost		Fair Value
Due in one year or less	$	266.7	$	266.7
Due after one year through five years		1,307.4		1,339.2
Due after five years through ten years		698.2		727.3
Thereafter		140.7		147.1
Structured securities		741.0		778.7
Total	$	3,154.0	$	3,259.0

The expected maturities may differ from the contractual maturities because debtors may have the right to call or prepay obligations.

Unrealized Losses and Other-Than-Temporary Impairments

An aging of unrealized losses on our investments at September 30, 2011 and December 31, 2010 is presented below:

September 30, 2011	Less Than One Year					One Year or Greater				Total
	Fair			Unrealized		Fair		Unrealized		Fair			Unrealized
(in millions)	Value			Losses		Value		Losses		Value			Losses
Fixed maturities
USD denominated:
U.S. Governments	$	29.0		$	0.1	$	0.0	$	0.0	$	29.0		$	0.1
Non-U.S. Governments		30.4			2.5		0.0		0.0		30.4			2.5
Obligations of states and political subdivisions		16.0			0.1		0.4		0.6		16.4			0.7
Credit-Financial		118.5			5.7		6.2		0.9		124.7			6.6
Credit-Industrial		121.4			6.6		0.0		0.0		121.4			6.6
Credit-Utility		38.9			2.3		0.0		0.0		38.9			2.3
Structured securities:
CMO/MBS-agency		22.4			0.2		0.0		0.0		22.4			0.2
CMO/MBS-non agency		7.2			0.2		4.3		0.5		11.5			0.7
CMBS (1)		2.5			0.0		4.4		0.3		6.9			0.3
ABS-residential		4.9			0.3		6.8		1.7		11.7			2.0
ABS-non residential (1)		3.5			0.0		0.0		0.0		3.5			0.0
Foreign denominated:
Governments		159.5			9.0		0.0		0.0		159.5			9.0
Credit		77.0			4.9		4.3		0.2		81.3			5.1
Total fixed maturities		631.2			31.9		26.4		4.2		657.6			36.1
Equity securities		121.5			13.2		0.2		0.1		121.7			13.3
Other investments		(4.3	)		4.3		0.0		0.0		(4.3	)		4.3
Short-term investments		32.2			0.6		0.0		0.0		32.2			0.6
Total	$	780.6		$	50.0	$	26.6	$	4.3	$	807.2		$	54.3

⁽¹⁾  Unrealized losses less than one year are less than $0.1 million.

December 31, 2010	Less Than One Year				One Year or Greater				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(in millions)	Value		Losses		Value		Losses		Value		Losses
Fixed maturities
USD denominated:
U.S. Governments (2)	$	55.2	$	0.8	$	2.0	$	0.0	$	57.2	$	0.8
Obligations of states and political subdivisions		122.6		2.6		2.9		0.3		125.5		2.9
Credit-Financial		53.7		0.6		14.8		1.1		68.5		1.7
Credit-Industrial		44.3		0.8		0.0		0.0		44.3		0.8
Credit-Utility		21.7		0.4		0.0		0.0		21.7		0.4
Structured securities:
CMO/MBS-agency		26.5		0.5		0.0		0.0		26.5		0.5
CMO/MBS-non agency		1.1		0.3		6.6		0.3		7.7		0.6
CMBS		5.3		0.1		8.7		0.8		14.0		0.9
ABS-residential		6.4		0.3		8.5		2.0		14.9		2.3
ABS-non residential (1) (2)		1.5		0.0		0.7		0.0		2.2		0.0
Foreign denominated:
Governments		82.9		3.1		32.3		1.8		115.2		4.9
Credit		26.1		1.3		15.8		1.8		41.9		3.1
Total fixed maturities		447.3		10.8		92.3		8.1		539.6		18.9
Equity securities		9.8		0.8		0.0		0.0		9.8		0.8
Short-term investments (1)		4.3		0.0		0.0		0.0		4.3		0.0
Total	$	461.4	$	11.6	$	92.3	$	8.1	$	553.7	$	19.7

⁽¹⁾  Unrealized losses less than one year are less than $0.1 million.

⁽²⁾  Unrealized losses one year or greater are less than $0.1 million.

We hold a total of 5,220 securities, of which 1,719 were in an unrealized loss position for less than one year and 44 were in an unrealized loss position for a period one year or greater as of September 30, 2011. Unrealized losses greater than twelve months on fixed maturities were the result of a number of factors, including increased credit spreads, foreign currency fluctuations, and higher market yields relative to the date the securities were purchased, and for structured securities, by the performance of the underlying collateral as well. We do not consider these investments to be other-than-temporarily impaired at September 30, 2011.

We regularly evaluate our investments for impairment. For fixed maturity securities, the evaluation for a credit loss is generally based on the present value of expected cash flows of the security as compared to the amortized book value. For MBS and residential ABS securities, frequency and severity of loss inputs are used in projecting future cash flows of the securities. Loss frequency is measured as the credit default rate, which includes such factors as loan-to-value ratios and credit scores of borrowers. Loss severity includes such factors as trends in overall housing prices and house prices that are obtained at foreclosure. We recognized other-than-temporary losses on our fixed maturities portfolio of $0.1 million for the three and nine months ended September 30, 2011. For equity securities, the length of time and the amount of decline in fair value are the principal factors in determining other-than-temporary impairment. We recognized other-than-temporary losses on our equity portfolio of $1.1 million for the three and nine months ended September 30, 2011.

Realized Gains and Losses

The following table presents the Company's gross realized investment and other gains (losses) for the three and nine months ended September 30:

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Realized gains
Fixed maturities	$	8.4		$	5.3		$	25.5		$	27.0
Equity securities		0.9			0.9			15.7			4.4
Short-term and other investments		3.9			5.2			12.6			6.9
Gross realized gains		13.2			11.4			53.8			38.3
Realized losses
Fixed maturities		(2.5	)		(2.0	)		(6.8	)		(7.4	)
Equity securities		0.0			(0.2	)		(0.7	)		(1.1	)
Short-term and other investments		(5.6	)		(0.1	)		(7.4	)		(0.4	)
Other-than-temporary impairment losses on fixed maturities		(0.1	)		0.0			(0.1	)		(0.8	)
Other-than-temporary impairment losses on equity securities		(1.1	)		0.0			(1.1	)		0.0
Gross realized losses		(9.3	)		(2.3	)		(16.1	)		(9.7	)
Net realized investment and other gains	$	3.9		$	9.1		$	37.7		$	28.6

We enter into short-term, currency spot and forward contracts to mitigate foreign exchange rate exposure for certain non-U.S. Dollar denominated fixed maturity investments. The forward contracts used are typically less than sixty days and are renewed, as long as the non-U.S. Dollar denominated fixed maturity investments are held in our portfolio. These forward contracts are designated as fair value hedges for accounting purposes.

Foreign exchange unrealized gains on bonds of $0.5 million were offset by foreign exchange realized losses on forwards of $0.5 million for the three and nine months ended September 30, 2011 and are reflected in realized gains and losses in the Consolidated Statements of (Loss) Income and in the table above. As of September 30, 2011, we hedged $4.3 million of certain holdings in non-U.S. denominated fixed maturity investments with the same amount of foreign exchange forward contracts.

We also enter into foreign currency exchange forward contracts to manage currency exposure on losses related to global catastrophe events. These currency forward contracts are carried at fair value in the Consolidated Balance Sheets in Other investments. The realized and unrealized gains and losses are included in realized gains or losses in the Consolidated Statements of (Loss) Income. The notional amount of the currency forward contracts as of September 30, 2011 was $133.4 million. The fair value of the currency forward contracts as of September 30, 2011 was a loss of $4.3 million. For the three and nine months ended September 30, 2011, we recognized $1.1 million in realized losses and $2.8 million in realized gains, respectively, from the currency forward contracts.

Regulatory Deposits, Pledged Securities and Letters of Credit

At September 30, 2011, the amortized cost and fair value of investments on deposit with U.S. and various other regulatory agencies for regulatory purposes and reinsurance were $238.7 million and $253.8 million, respectively.

Investments with an amortized cost of $180.6 million and fair value of $184.9 million were pledged as collateral in support of irrevocable letters of credit at September 30, 2011. These assets support irrevocable letters of credit issued under the terms of certain reinsurance agreements in respect of reported loss and loss expense reserves in the amount of $31.8 million and our Corporate member's capital as security to support the underwriting business at Lloyd's in the amount of $127.5 million.

At September 30, 2011, our Corporate member's capital supporting our Lloyd's business consisted of:

(in millions)
Letters of credit	$	127.5
Fixed maturities, at fair value		140.7
Short-term investments, at fair value		4.8
Total securities and letters of credit pledged to Lloyd's	$	273.0

Fair Value Measurements

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability, or in the absence of a principal market, the most advantageous market. Market participants are buyers and sellers in the principal (or most advantageous) market that are independent, knowledgeable, able to transact for the asset or liability and willing to transfer for the asset or liability.

Valuation techniques consistent with the market approach, income approach and/or cost approach are used to measure fair value. The inputs of these valuation techniques are categorized into three levels.

• Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that can be accessed at the reporting date. We define actively traded as a security that has traded in the past seven days. We receive one quote per instrument for Level 1 inputs.

• Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. We receive one quote per instrument for Level 2 inputs.

• Level 3 inputs are unobservable inputs. Unobservable inputs reflect our own assumptions about the assumptions market participants would use in pricing the asset or liability based on the best information available in the circumstances.

We receive fair value prices from independent pricing services and our independent investment managers. These prices are determined using observable market information such as dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. We have reviewed the processes used by the third party providers for pricing the securities, and have determined that these processes result in fair values consistent with GAAP requirements. In addition, we reviewed these prices for reasonableness, and have not adjusted any prices received from the third-party providers as of September 30, 2011. A description of the valuation techniques we use to measure assets at fair value is as follows:

Fixed Maturities (Available-for-Sale) Levels 1 and 2:

• United States Treasury securities are typically valued using Level 1 inputs. For these securities, we obtain fair value measurements from independent pricing services using quoted prices (unadjusted) in active markets at the reporting date.

• United States Government agencies, non-U.S. Government securities, obligations of states and political subdivisions, credit securities and foreign denominated securities are reported at fair value utilizing Level 2 inputs. For these securities, we obtain fair value measurements from third party pricing services.

• CMO/MBS agency securities are reported at fair value utilizing Level 2 inputs. For these securities, we obtain fair value measurements from third party pricing services. Observable data may include dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. All of these securities are backed by United States agencies and are of the highest investment grade.

• CMO/MBS non-agency, CMBS, ABS residential, and ABS non-residential securities are reported at fair value utilizing Level 2 inputs. For these securities, we obtain fair value measurements from third party pricing services. Observable data may include dealer quotes, market spreads, cash flows, yield curves, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things.

Fixed Maturities (Available-for-Sale) Level 3:

• Corporate securities reported at fair value utilizing Level 3 inputs are infrequently traded securities valued by an independent investment manager utilizing unobservable inputs.

Transfers Between Level 1 and Level 2 Securities: There were no transfers between Level 1 and Level 2 securities during the nine month period ended September 30, 2011.

Equity Securities Level 1: Equity securities are principally reported at fair value utilizing Level 1 inputs. For these securities, we obtain fair value measurements from a third party pricing service using quoted prices (unadjusted) in active markets at the reporting date.

Equity Securities Level 2: We own an interest in a mutual fund that is reported at fair value utilizing Level 2 inputs. The valuation is based on the fund's net asset value per share, determined weekly and at the end of each month. The underlying assets in the fund are valued primarily on the basis of closing market quotations or official closing prices on each valuation day.

Equity Securities Level 3: We own certain equity securities that are reported at fair value utilizing Level 3 inputs. The valuation techniques for these securities include the following:

• Fair value measurements are obtained from the National Association of Insurance Commissioners' Security Valuation Office at the reporting date.

• We used a quoted market price and adjusted the price using unobservable inputs due to certain restrictions as to the ability to sell a security.

• We obtained fair value measurements for an investment in an equity fund by applying final prices provided by the administrator of the fund, which is based upon certain estimates and assumptions.

Other Investments Level 2: Foreign regulatory deposits are assets held in trust in jurisdictions where there is a legal and regulatory requirement to maintain funds locally in order to protect policyholders. Lloyd's is the appointed investment manager for the funds. These assets are invested in short term government securities, agency securities and corporate bonds and are valued utilizing Level 2 inputs based upon values obtained from Lloyd's. Foreign currency future contracts are valued by our counterparty utilizing market driven foreign currency exchange rates and are considered Level 2 investments. There were no transfers of other investments between Level 1 and Level 2 for the nine months ended September 30, 2011.

Short-term Investments: Short-term investments are principally reported at fair value utilizing Level 1 inputs, with the exception of short-term corporate bonds reported at fair value utilizing Level 2 inputs as described in the fixed maturity section above. Values for the investments categorized as Level 1 are obtained from various financial institutions as of the reporting date. Included in short-term investments are Funds at Lloyd's, which represent a portion of our Corporate member's capital as security to support the underwriting business at Lloyd's and include fixed cash deposit accounts, certificates of deposits, sovereign debt, United Kingdom short government gilts and U.S. Treasury bills. There were no transfers of short-term investments between Level 1 and Level 2 for the nine months ended September 30, 2011.

Based on an analysis of the inputs, our financial assets measured at fair value on a recurring basis at September 30, 2011 and December 31, 2010 have been categorized as follows:

			Fair Value Measurements at Reporting Date Using
(in millions)	September 30, 2011		Level 1 (a)		Level 2 (b)		Level 3 (c)
Fixed maturities
USD denominated:
U.S. Governments	$	516.9	$	241.7	$	275.2	$	0.0
Non-U.S. Governments		43.2		0.0		43.2		0.0
Obligations of states and political subdivisions		625.2		0.0		625.2		0.0
Credit-Financial		393.0		0.0		392.3		0.7
Credit-Industrial		417.7		0.0		417.7		0.0
Credit-Utility		169.6		0.0		169.6		0.0
Structured securities:
CMO/MBS-agency		558.7		0.0		558.7		0.0
CMO/MBS-non agency		20.8		0.0		20.8		0.0
CMBS		113.4		0.0		113.4		0.0
ABS-residential		14.4		0.0		14.4		0.0
ABS-non residential		71.4		0.0		71.4		0.0
Foreign denominated:
Governments		220.4		0.0		220.4		0.0
Credit		94.3		0.0		94.3		0.0
Total fixed maturities		3,259.0		241.7		3,016.6		0.7
Equity securities		353.1		292.7		49.9		10.5
Other investments		102.0		0.0		102.0		0.0
Short-term investments		354.1		341.7		12.4		0.0
	$	4,068.2	$	876.1	$	3,180.9	$	11.2

^(a)  Quote prices in active markets for identical assets

^(b)  Significant other observable inputs

^(c)  Significant unobservable inputs

			Fair Value Measurements at Reporting Date Using
(in millions)	December 31, 2010		Level 1 (a)		Level 2 (b)		Level 3 (c)
Fixed maturities
USD denominated:
U.S. Governments	$	440.8	$	146.2	$	294.6	$	0.0
Non-U.S. Governments		6.4		0.0		6.4		0.0
Obligations of states and political subdivisions		653.3		0.0		653.3		0.0
Credit-Financial		381.1		0.0		380.4		0.7
Credit-Industrial		395.1		0.0		395.1		0.0
Credit-Utility		170.8		0.0		170.8		0.0
Structured securities:
CMO/MBS-agency		699.1		0.0		699.1		0.0
CMO/MBS-non agency		38.3		0.0		38.3		0.0
CMBS		149.0		0.0		149.0		0.0
ABS-residential		17.1		0.0		17.1		0.0
ABS-non residential		130.1		0.0		130.1		0.0
Foreign denominated:
Governments		206.7		0.0		206.7		0.0
Credit		73.6		0.0		73.6		0.0
Total fixed maturities		3,361.4		146.2		3,214.5		0.7
Equity securities		324.5		253.3		50.2		21.0
Other investments		91.0		0.0		91.0		0.0
Short-term investments		375.3		369.0		6.3		0.0
	$	4,152.2	$	768.5	$	3,362.0	$	21.7

^(a)  Quote prices in active markets for identical assets

^(b)  Significant other observable inputs

^(c)  Significant unobservable inputs

The fair value measurements in the tables above do not agree to "Total investments" on the Consolidated Balance Sheets as they exclude certain other investments that are accounted for under the equity-method of accounting and are not included in this disclosure.

A reconciliation of the beginning and ending balances for the investments categorized as Level 3 at September 30, 2011 and December 31, 2010 are as follows:

Fair Value Measurements Using Unobservable Inputs (Level 3)

(in millions)	Credit Financial		Equity Securities			Total
Beginning balance, January 1, 2011	$	0.7	$	21.0		$	21.7
Transfers into Level 3		0.0		0.0			0.0
Transfers out of Level 3		0.0		0.0			0.0
Total gains or losses (realized/unrealized):
Included in net loss		0.0		9.6			9.6
Included in other comprehensive income		0.0		(7.6	)		(7.6	)
Purchases, issuances, sales, and settlements
Purchases		0.0		0.0			0.0
Issuances		0.0		0.0			0.0
Sales		0.0		(12.5	)		(12.5	)
Settlements		0.0		0.0			0.0
Ending balance, September 30, 2011	$	0.7	$	10.5		$	11.2
Amount of total gains or losses for the period included in net loss attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2011	$	0.0	$	0.0		$	0.0

Fair Value Measurements Using Unobservable Inputs (Level 3)

(in millions)	Credit Financial		Equity Securities			Total
Beginning balance, January 1, 2010	$	0.7	$	14.0		$	14.7
Transfers into Level 3		0.0		7.7			7.7
Transfers out of Level 3		0.0		(1.3	)		(1.3	)
Total gains or losses (realized/unrealized):
Included in net income		0.0		0.0			0.0
Included in other comprehensive income		0.0		1.8			1.8
Purchases, issuances, sales, and settlements
Purchases		0.0		0.0			0.0
Issuances		0.0		0.0			0.0
Sales		0.0		(1.2	)		(1.2	)
Settlements		0.0		0.0			0.0
Ending balance, December 31, 2010	$	0.7	$	21.0		$	21.7
Amount of total gains or losses for the period included in net income attributable to the change in unrealized gains or losses relating to assets still held at December 31, 2010	$	0.0	$	0.0		$	0.0

At September 30, 2011, we did not have any financial assets or financial liabilities measured at fair value on a nonrecurring basis.

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Shareholders' Equity (Narrative) (Details) (USD $) In Millions, except Share data	0 Months Ended					1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended	0 Months Ended		9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 15, 2011	Aug. 05, 2011	Sep. 15, 2010	Aug. 10, 2010	Oct. 07, 2011	Apr. 27, 2011	Feb. 22, 2011	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010	Nov. 13, 2011 2007 Repurchase Authorization [Member]	Feb. 18, 2011 2011 Repurchase Authorization [Member]	Sep. 30, 2011 2011 Repurchase Authorization [Member]	Sep. 30, 2011 Open Market [Member]	Sep. 30, 2011 Open Market [Member]
Equity, Class of Treasury Stock [Line Items]
Cash dividend declared - common shares, per share		$ 0.12		$ 0.12				$ 0.12	$ 0.12	$ 0.36	$ 0.36
Cash dividends paid - common shares, total	$ 3.3		$ 3.5							$ 10.0	$ 10.8
Common shares repurchased					354,551	123,539	406,290			310,619		110,300		4,588,261		310,321	340,321
Common shares repurchased, total cost					10.0	4.0	14.8			8.7		4.2		149.7		8.3	9.3
Common stock repurchase authorization, maximum													150.0	150.0
Common stock repurchased, average cost per share					$ 28.20	$ 32.02	$ 36.59			$ 28.16				$ 32.63
Common stock repurchase authorization for future repurchases															$ 126.7

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Investments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2011	Dec. 31, 2010
Schedule of Investments [Line Items]
Fair value of investments, assets managed on behalf of the trade capital providers	$ 170.7	$ 170.7	$ 170.4
Number of securities in an unrealized loss position, total		5,220
Number of securities in an unrealized loss position for less than one year		1,719
Number of securities in an unrealized loss position for a period of one year or greater		44
Forward contracts, term, days		60
Foreign exchange unrealized gains on bonds		0.5
Foreign exchange realized losses on forwards	0.5	0.5
Fair value of currency forward contracts	(4.3)	(4.3)
Realized gains (loss) from currency forward contracts	(1.1)	2.8
Total notional amount of the Company's holdings in non-U.S. Dollar denominated higher yielding fixed maturity investments	4.3	4.3
Notional amount of foreign currency derivatives	133.4	133.4
Fair value	4,180.3	4,180.3	4,215.4
Loss and loss expense reserve	31.8	31.8
Underwriting business at Lloyd's	127.5	127.5
Other than temporary losses fixed maturities portfolio	0.1	0.1
Other than temporary losses equity portfolio	1.1	1.1
Deposit With Various U.S. Insurance And Other Regulatory Agencies [Member]
Schedule of Investments [Line Items]
Amortized cost	238.7	238.7
Fair value	253.8	253.8
Securities Pledged As Collateral [Member]
Schedule of Investments [Line Items]
Pledged assets separately reported, securities pledged under letters of credit facilities, at amortized cost	180.6	180.6
Pledged assets separately reported, securities pledged under letters of credit facilities, at fair value	$ 184.9	$ 184.9

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Underwriting, Acquisition And Insurance Expenses (Underwriting, Acquisition And Insurance Expenses) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Underwriting, Acquisition And Insurance Expenses [Abstract]
Commissions	$ 49.0	$ 46.6	$ 143.1	$ 163.3
General expenses	51.0	58.1	153.1	158.7
Premium taxes, boards and bureaus	8.0	6.9	19.7	19.5
Subtotal	108.0	111.6	315.9	341.5
Net (deferral) amortization of policy acquisition costs	(1.7)	4.2	0	19.2
Total underwriting, acquisition and insurance expenses	$ 106.3	$ 115.8	$ 315.9	$ 360.7

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Segment Information (Revenue And (Loss) Income Before Income Taxes For Each Segment) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenue And Loss Income Before Income Taxes [Line Items]
Earned premiums	$ 268.2	$ 288.9	$ 800.9	$ 936.9
Net investment income	30.0	33.6	96.3	100.5
Fee income, net	1.4	1.7	1.8	2.0
Net realized investment and other gains	3.9	9.1	37.7	28.6
Total revenue	303.5	333.3	936.7	1,068.0
Segment (loss) income before taxes	(5.8)	33.7	(81.8)	73.3
Total (loss) income before income taxes	(6.1)	31.4	(71.2)	97.0
Excess And Surplus Lines [Member]
Revenue And Loss Income Before Income Taxes [Line Items]
Earned premiums	99.4	122.2	305.6	376.0
Net investment income	13.2	14.4	42.4	43.7
Segment (loss) income before taxes	19.5	15.3	40.8	43.5
Commercial Specialty [Member]
Revenue And Loss Income Before Income Taxes [Line Items]
Earned premiums	82.9	81.6	233.7	254.2
Net investment income	6.6	7.2	21.0	22.1
Segment (loss) income before taxes	(1.6)	11.9	(8.1)	17.7
International Specialty [Member]
Revenue And Loss Income Before Income Taxes [Line Items]
Earned premiums	21.4	24.8	76.2	74.7
Net investment income	2.6	2.4	8.5	6.4
Segment (loss) income before taxes	(13.3)	8.4	(64.6)	23.0
Syndicate 1200 [Member]
Revenue And Loss Income Before Income Taxes [Line Items]
Earned premiums	67.3	60.7	188.2	232.2
Net investment income	4.3	3.9	13.3	10.6
Segment (loss) income before taxes	(4.6)	0.1	(47.9)	(12.8)
Run-Off Lines [Member]
Revenue And Loss Income Before Income Taxes [Line Items]
Earned premiums	(0.1)	(0.4)	0.3	(0.2)
Net investment income	3.1	4.3	10.4	13.4
Segment (loss) income before taxes	(5.8)	(2.0)	(2.0)	1.9
Corporate And Other [Member]
Revenue And Loss Income Before Income Taxes [Line Items]
Earned premiums	(2.7)	0	(3.1)	0
Net investment income	0.2	1.4	0.7	4.3
Net realized investment and other gains	$ (4.2)	$ (11.4)	$ (27.1)	$ (4.9)

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Equity-Based Compensation (Summary Of Restricted Share Units Activity Under The 2007 Plan) (Details) (Restricted Share Units [Member], USD $)	9 Months Ended
	Sep. 30, 2011
Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at January 1, 2011	102,243
Granted, Shares	91,775
Vested and issued, Shares	(29,124)
Expired or forfeited, Shares	(17,557)
Shares, Outstanding at September 30, 2011	147,337
Weighted-Average Grant Date Fair Value, Outstanding at January 1, 2011	$ 30.11
Granted, Weighted-Average Grant Date Fair Value	$ 32.53
Vested and issued, Weighted-Average Grant Date Fair Value	$ 32.81
Expired or forfeited, Weighted-Average Grant Date Fair Value	$ 31.80
Weighted-Average Grant Date Fair Value, Outstanding at September 30, 2011	$ 31.94

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Disclosures About Fair Value Of Financial Instruments (Summary Of The Company's Financial Instruments Whose Carrying Amount Did Not Equal Fair Value) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Carrying Amount	$ 4,180.3	$ 4,215.4
Other Indebtedness [Member] | Floating Rate Loan Stock [Member]
Debt Instrument [Line Items]
Carrying Amount	66.1	64.2
Fair Value	48.0	44.3
Other Indebtedness [Member] | Note Payable [Member]
Debt Instrument [Line Items]
Carrying Amount	0.8	0.8
Fair Value	0.6	0.5
Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Carrying Amount	311.5	311.5
Fair Value	250.0	238.6
Financial Instruments Whose Carrying Amount Did Not Equal Fair Value [Member]
Debt Instrument [Line Items]
Carrying Amount	378.4	376.5
Fair Value	$ 298.6	$ 283.4

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Shareholders' Equity

9 Months Ended

Sep. 30, 2011

Shareholders' Equity [Abstract]

Shareholders' Equity

4.    Shareholders' Equity

On August 5, 2011 and August 10, 2010, our Board of Directors declared a quarterly cash dividend in the amount of $0.12 on each share of common stock outstanding. On September 15, 2011 and 2010, we paid $3.3 million and $3.5 million to our shareholders of record on September 1, 2011 and 2010, respectively. For the nine months ended September 30, 2011 and 2010, we have paid cash dividends totaling $10.0 million and $10.8 million to our shareholders.

On February 18, 2011, our Board of Directors authorized the repurchase of up to $150.0 million of our common shares ("2011 Repurchase Authorization"). The 2011 Repurchase Authorization supersedes the November 13, 2007 repurchase authorization ("2007 Repurchase Authorization"), which also had authorized the repurchase of up to $150.0 million of our common shares. From inception of the repurchase authorizations through October 7, 2011, we have repurchased 4,588,261 shares of our common stock at an average price of $32.63 for a total cost of $149.7 million. These shares are being held as treasury shares in accordance with the provisions of the Bermuda Companies Act 1981. As of October 7, 2011, availability under the 2011 Repurchase Authorization for future repurchases of our common shares was $126.7 million.

A summary of activity from January 1, 2011 through October 7, 2011 follows.

For the three months ended September 30, 2011, we repurchased 310,321 common shares on the open market for $8.3 million. For the nine months ended September 30, 2011, we repurchased 340,321 common shares on the open market for $9.3 million.

In 2011, we repurchased shares under Securities Exchange Act of 1934 Rule 10b5-1 trading plans as follows

Date Trading Plan Initiated	Trading Plan's 2011 Purchase Period	Number of Shares Repurchased		Average Price of Shares Repurchased		Total Cost (in millions)		Repurchase Authorization Year
12/15/2010	01/01/11-02/22/11 (1)		406,290	$	36.59	$	14.8		2007
03/15/2011	03/16/11-04/27/11		123,539	$	32.02		4.0		2011
09/15/2011	09/16/11-10/07/11 (2)		354,551	$	28.20		10.0		2011

⁽¹⁾  The above table only reflects the 2011 activity under this Rule 10b5-1 trading plan. In 2010, 110,300 shares were repurchased under this Rule 10b5-1 trading plan for a total cost of $4.2 million. Total shares repurchased in 2010 and 2011 under this Rule 10b5-1 trading plan are 516,590 shares at an average price of $36.94 for a total cost of $19.0 million.

⁽²⁾  Through September 30, 2011, 310,619 shares were repurchased at an average price of $28.16 for a total cost of $8.7 million.

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Net (Loss) Income Per Common Share (Narrative) (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2010	Sep. 30, 2010	Sep. 30, 2011	Dec. 31, 2010
Net (Loss) Income Per Common Share [Abstract]
Treasury shares	2,374,101	2,374,101	4,544,329	3,363,560
Antidilutive securities excluded from computation of earnings per share, shares	894,068	894,068

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Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2011

Supplemental Cash Flow Information [Abstract]

Schedule Of Interest Paid

	For the Nine Months Ended September 30,
(in millions)	2011		2010
Junior subordinated debentures	$	16.2	$	17.2
Revolving credit facility		0.0		0.1
Other indebtedness		2.8		2.4
Total interest paid	$	19.0	$	19.7

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Supplemental Cash Flow Information (Schedule Of Interest Paid) (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Interest Paid [Line Items]
Income taxes paid	$ 15.3	$ 19.8
Revolving credit facility	0	0.1
Income taxes recovered	0.2	2.6
Total interest paid	19.0	19.7
Junior Subordinated Debentures [Member]
Interest Paid [Line Items]
Total interest paid	16.2	17.2
Other Indebtedness [Member]
Interest Paid [Line Items]
Total interest paid	$ 2.8	$ 2.4

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Investments (Schedule Of Amortized Cost And Fair Values Of Fixed Maturity Investments, By Contractual Maturity) (Details) (USD $) In Millions	Sep. 30, 2011
Amortized Cost
Amortized Cost, Due in one year or less	$ 266.7
Amortized Cost, Due after one year through five years	1,307.4
Amortized Cost, Due after five years through ten years	698.2
Amortized Cost, Thereafter	140.7
Amortized Cost, Structured securities	741.0
Amortized Cost, Total	3,154.0
Fair Value
Fair Value, Due in one year or less	266.7
Fair Value, Due after one year through five years	1,339.2
Fair Value, Due after five years through ten years	727.3
Fair Value, Thereafter	147.1
Fair Value, Structured securities	778.7
Fair Value, Total	$ 3,259.0

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Shareholders' Equity (Schedule Of Repurchase Of Shares) (Details) (USD $) In Millions, except Share data	0 Months Ended		1 Months Ended			9 Months Ended	12 Months Ended
	Oct. 07, 2011		Apr. 27, 2011	Feb. 22, 2011		Sep. 30, 2011	Dec. 31, 2010
Date Trading Plan Initiated	Sep. 15, 2011		Mar. 15, 2011	Dec. 15, 2010
Number of Shares Repurchased	354,551		123,539	406,290		310,619	110,300
Average Price of Shares Repurchased	$ 28.20		$ 32.02	$ 36.59		$ 28.16
Total Cost	$ 10.0		$ 4.0	$ 14.8		$ 8.7	$ 4.2
Repurchase Authorization Year	2011		2011	2007
Total Number of Shares Repurchased						516,590
Total Average Price of Shares Repurchased						$ 36.94
Total Cost						$ 19.0
Starting Date [Member]
Trading Plan's 2011 Purchase Period	2011-09-16	[1]	2011-03-16	2011-01-01	[2]
Ending Date [Member]
Trading Plan's 2011 Purchase Period	2011-10-07	[1]	2011-04-27	2011-02-22	[2]

[1] Through September 30, 2011, 310,619 shares were repurchased at an average price of $28.16 for a total cost of $8.7 million.

[2] The above table only reflects the 2011 activity under this Rule 10b5-1 trading plan. In 2010, 110,300 shares were repurchased under this Rule 10b5-1 trading plan for a total cost of $4.2 million. Total shares repurchased in 2010 and 2011 under this Rule 10b5-1 trading plan are 516,590 shares at an average price of $36.94 for a total cost of $19.0 million.

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Recently Issued Accounting Standards (Details) (USD $) In Millions	Sep. 30, 2011
Maximum [Member]
Adjustment to retained earnings	$ 35.0
Minimum [Member]
Adjustment to retained earnings	$ 30.0

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Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2011

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flow Information

12. Supplemental Cash Flow Information

Income taxes paid. We paid income taxes of $15.3 million and $19.8 million during the nine months ended September 30, 2011 and 2010, respectively.

Income taxes recovered. We recovered income taxes of $0.2 million during the nine months ended September 30, 2011. During the same period in 2010, $2.6 million of income taxes was recovered. This recovery, reflected in "Current income taxes receivable, net," was applied against our 2010 estimated tax payments.

Interest paid. Interest paid for the nine months ended September 30, was as follows:

	For the Nine Months Ended September 30,
(in millions)	2011		2010
Junior subordinated debentures	$	16.2	$	17.2
Revolving credit facility		0.0		0.1
Other indebtedness		2.8		2.4
Total interest paid	$	19.0	$	19.7

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Reserves For Losses And Loss Adjustment Expenses (Reinsurance Recoverables) (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010
Reserves For Losses And Loss Adjustment Expenses [Abstract]
Net beginning of the year	$ 2,253.0		$ 2,213.2
Current accident year, incurred	662.8		631.7
Prior accident years, incurred	1.6		(26.8)
Losses and LAE incurred during calendar year, net of reinsurance	664.4		604.9
Current accident year, payments	153.2		129.3
Prior accident year, payments	417.1		445.6
Losses and LAE payments made during current calendar year, net of reinsurance:	570.3		574.9
Additional participation interest	31.2	[1]	44.6	[1]
Foreign exchange adjustments	12.0		(11.9)
Net reserves - end of period	2,390.3		2,275.9
Reinsurance recoverable on unpaid losses and LAE, end of period	959.3		954.3
Gross reserves - end of period	$ 3,349.6		$ 3,230.2

[1] Amount represents additional reserves due to increased syndicate participation.

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Segment Information (Identifiable Assets) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Identifiable Assets [Line Items]
Identifiable assets	$ 6,502.7	$ 6,488.5
Excess And Surplus Lines [Member]
Identifiable Assets [Line Items]
Identifiable assets	2,287.4	2,340.9
Commercial Specialty [Member]
Identifiable Assets [Line Items]
Identifiable assets	1,271.8	1,300.0
International Specialty [Member]
Identifiable Assets [Line Items]
Identifiable assets	684.3	500.2
Syndicate 1200 [Member]
Identifiable Assets [Line Items]
Identifiable assets	1,580.5	1,574.1
Run-Off Lines [Member]
Identifiable Assets [Line Items]
Identifiable assets	572.0	639.1
Corporate And Other [Member]
Identifiable Assets [Line Items]
Identifiable assets	$ 106.7	$ 134.2

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Net (Loss) Income Per Common Share

9 Months Ended

Sep. 30, 2011

Net (Loss) Income Per Common Share [Abstract]

Net (Loss) Income Per Common Share

5.    Net (Loss) Income Per Common Share

The following table presents the calculation of net (loss) income per common share on a basic and diluted basis for the three and nine months ended September 30, 2011 and 2010:

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
(in millions, except number of shares and per share amounts)	2011			2010		2011			2010
Net (loss) income	$	(12.1	)	$	23.0	$	(83.8	)	$	69.8
Weighted average common shares outstanding - basic		27,237,788			29,504,900		27,374,953			29,998,803
Effect of dilutive securities
Equity compensation awards		0			371,450		0			334,882
Weighted average common shares outstanding - diluted		27,237,788			29,876,350		27,374,953			30,333,685
Net (loss) income per common share - basic	$	(0.44	)	$	0.78	$	(3.06	)	$	2.33
Net (loss) income per common share - diluted	$	(0.44	)	$	0.77	$	(3.06	)	$	2.31

Excluded from the weighted average common shares outstanding calculation at September 30, 2011 and 2010 are 4,544,329 shares and 2,374,101 shares, respectively, which are held as treasury shares. The shares are excluded as of their repurchase date. For the three and nine months ended September 30, 2011, the equity compensation awards are excluded from the calculation of diluted earnings per common share because the net loss would cause their effect to be anti-dilutive. For the three and nine months ended September 30, 2010, equity compensation awards to purchase 894,068 shares of common stock were excluded from the computation of diluted net income per common share as these instruments were anti-dilutive. These instruments expire at varying times from 2011 through 2016.

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Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2011

Shareholders' Equity [Abstract]

Schedule Of Repurchase Of Shares

Date Trading Plan Initiated	Trading Plan's 2011 Purchase Period	Number of Shares Repurchased		Average Price of Shares Repurchased		Total Cost (in millions)		Repurchase Authorization Year
12/15/2010	01/01/11-02/22/11 (1)		406,290	$	36.59	$	14.8		2007
03/15/2011	03/16/11-04/27/11		123,539	$	32.02		4.0		2011
09/15/2011	09/16/11-10/07/11 (2)		354,551	$	28.20		10.0		2011

⁽¹⁾  The above table only reflects the 2011 activity under this Rule 10b5-1 trading plan. In 2010, 110,300 shares were repurchased under this Rule 10b5-1 trading plan for a total cost of $4.2 million. Total shares repurchased in 2010 and 2011 under this Rule 10b5-1 trading plan are 516,590 shares at an average price of $36.94 for a total cost of $19.0 million.

⁽²⁾  Through September 30, 2011, 310,619 shares were repurchased at an average price of $28.16 for a total cost of $8.7 million.

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Disclosures About Fair Value Of Financial Instruments (Narrative) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Financial Instruments Owned and Pledged as Collateral [Line Items]
Premiums receivable	$ 343.9	$ 301.8
Reinsurance recoverables	1,107.0	1,203.9
Over 90 Days [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Premiums receivable	18.6	18.9
Reinsurance recoverables	20.6	28.7
Premiums receivable, allowance for doubtful accounts	2.9	4.6
Reinsurance recoverable, allowance for doubtful accounts	3.1	11.1
Premiums receivable, secured by collateral	0.2	0.4
Reinsurance recoverables, secured by collateral	$ 0.2	$ 0.4

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Investments (Schedule Of A Reconciliation Of The Beginning And Ending Balances For The Investments Categorized As Level 3) (Details) (USD $) In Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 21.7	$ 14.7
Transfers into Level 3	0	7.7
Transfers out of Level 3	0	(1.3)
Included in net income (loss)	9.6	0
Included in other comprehensive income	(7.6)	1.8
Purchases	0	0
Issuances	0	0
Sales	(12.5)	(1.2)
Settlements	0	0
Ending balance	11.2	21.7
Amount of total gains or losses for the period included in net loss attributable to the change in unrealized gains or losses relating to assets still held at End of Period	0	0
Credit Financial [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	0.7	0.7
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Included in net income (loss)	0	0
Included in other comprehensive income	0	0
Purchases	0	0
Issuances	0	0
Sales	0	0
Settlements	0	0
Ending balance	0.7	0.7
Amount of total gains or losses for the period included in net loss attributable to the change in unrealized gains or losses relating to assets still held at End of Period	0	0
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	21.0	14.0
Transfers into Level 3	0	7.7
Transfers out of Level 3	0	(1.3)
Included in net income (loss)	9.6	0
Included in other comprehensive income	(7.6)	1.8
Purchases	0	0
Issuances	0	0
Sales	(12.5)	(1.2)
Settlements	0	0
Ending balance	10.5	21.0
Amount of total gains or losses for the period included in net loss attributable to the change in unrealized gains or losses relating to assets still held at End of Period	$ 0	$ 0

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Disclosures About Fair Value Of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2011

Disclosures About Fair Value Of Financial Instruments [Abstract]

Summary Of The Company's Financial Instruments Whose Carrying Amount Did Not Equal Fair Value

	September 30, 2011				December 31, 2010
(in millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Junior subordinated debentures	$	311.5	$	250.0	$	311.5	$	238.6
Other indebtedness:
Floating rate loan stock		66.1		48.0		64.2		44.3
Note payable		0.8		0.6		0.8		0.5
	$	378.4	$	298.6	$	376.5	$	283.4

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Consolidated Statements Of Comprehensive (Loss) Income (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Comprehensive (Loss) Income [Abstract]
Net (loss) income	$ (12.1)	$ 23.0	$ (83.8)	$ 69.8
Other comprehensive (loss) income:
Foreign currency translation adjustments	(5.0)	0	(4.9)	0
Defined benefit pension plan:
Net loss arising during the period	(1.5)	(0.3)	(0.9)	(0.3)
Unrealized (losses) gains on securities:
(Losses) gains arising during the period	(50.0)	86.8	(2.7)	122.0
Reclassification adjustment for gains included in net (loss) income	(6.2)	(4.2)	(32.7)	(22.1)
Other comprehensive (loss) income before tax	(62.7)	82.3	(41.2)	99.6
Income tax (benefit) provision related to other comprehensive (loss) income:
Net loss arising during the period	(0.5)	(0.1)	(0.3)	(0.1)
Unrealized (losses) gains on securities:
(Losses) gains arising during the period	(9.2)	23.7	3.1	40.2
Reclassification adjustment for gains included in net (loss) income	(1.9)	(1.2)	(10.5)	(6.6)
Income tax (benefit) provision related to other comprehensive (loss) income	(11.6)	22.4	(7.7)	33.5
Other comprehensive (loss) income, net of tax	(51.1)	59.9	(33.5)	66.1
Comprehensive (loss) income	$ (63.2)	$ 82.9	$ (117.3)	$ 135.9

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Net (Loss) Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2011

Net (Loss) Income Per Common Share [Abstract]

Net (Loss) Income Per Common Share On A Basic And Diluted Basis

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
(in millions, except number of shares and per share amounts)	2011			2010		2011			2010
Net (loss) income	$	(12.1	)	$	23.0	$	(83.8	)	$	69.8
Weighted average common shares outstanding - basic		27,237,788			29,504,900		27,374,953			29,998,803
Effect of dilutive securities
Equity compensation awards		0			371,450		0			334,882
Weighted average common shares outstanding - diluted		27,237,788			29,876,350		27,374,953			30,333,685
Net (loss) income per common share - basic	$	(0.44	)	$	0.78	$	(3.06	)	$	2.33
Net (loss) income per common share - diluted	$	(0.44	)	$	0.77	$	(3.06	)	$	2.31

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Commitments And Contingencies (Details)

9 Months Ended

Sep. 30, 2011

Commitments And Contingencies [Abstract]

Loss contingency, opinion of counsel

At this stage, Argo Group is unable to determine with any reasonable certainty the specific claims, litigants, or alleged damages that ultimately may be associated with the Private Placement lawsuit or any other future proceedings regarding the alleged facts and circumstances described above, nor can we currently predict the timing of any rulings, trials or other significant events relating to such proceedings. Given these limitations and the inherent difficulty of projecting the outcome of litigated disputes, we are unable to reasonably estimate the possible loss, range of loss or legal costs that are likely to arise out of the pending securities litigation or any future proceedings relating to the above matters at this time. Argo Group has insurance protection that may cover a portion of any potential loss or legal costs, but a settlement above the coverage limits could impact our financial position and results of operations.

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Equity-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2011

Fair Value Assumptions

	2011	2010
Risk-free rate of return	0.89% to 2.07%	1.34% to 2.65%
Expected dividend yields	1.37% to 1.54%	1.55% to 1.65%
Expected award life (years)	5.04 to 5.07	1.00 to 5.06
Expected volatility	32.1% to 32.5%	31.3% to 31.8%

2007 Plan [Member]

Summary Of Option Activity

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		447,603		$	36.28
Granted		84		$	39.19
Exercised		(3,104	)	$	35.23
Expired or forfeited		(31,504	)	$	36.96
Outstanding at September 30, 2011		413,079		$	36.69

Summary Of Restricted Share Units Activity Under The 2007 Plan

	Shares			Weighted-Average Grant Date Fair Value
Outstanding at January 1, 2011		102,243		$	30.11
Granted		91,775		$	32.53
Vested and issued		(29,124	)	$	32.81
Expired or forfeited		(17,557	)	$	31.80
Outstanding at September 30, 2011		147,337		$	31.94

Summary Of Stock-Settled SARs Activity Under The 2007 Plan

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		630,947		$	28.22
Granted		403,518		$	32.50
Exercised		(13,397	)	$	28.38
Expired or forfeited		(162,560	)	$	28.74
Outstanding at September 30, 2011		858,508		$	30.13

Summary Of Cash-Settled SARs Activity Under The 2007 Plan

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		659,224		$	28.25
Granted		563,709		$	32.48
Exercised		(20,339	)	$	28.07
Expired or forfeited		(127,659	)	$	29.12
Outstanding at September 30, 2011		1,074,935		$	30.37

Amended Plan [Member]

Summary Of Option Activity Under The Amended Plan

	Shares			Weighted-Average Exercise Price
Outstanding at January 1, 2011		459,434		$	36.80
Granted		0		$	0.00
Exercised		(9,808	)	$	29.25
Expired or forfeited		(34,093	)	$	49.17
Outstanding at September 30, 2011		415,533		$	35.97

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Basis Of Presentation

9 Months Ended

Sep. 30, 2011

Basis Of Presentation [Abstract]

Basis Of Presentation

1. Basis of Presentation

The accompanying consolidated financial statements of Argo Group International Holdings, Ltd. ("Argo Group," "we" or the "Company") and its subsidiaries have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions for Form 10-Q and Article 10 of Regulation S-X. The preparation of interim financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The major estimates reflected in our consolidated financial statements include, but are not limited to, the reserves for losses and loss adjustment expenses, reinsurance recoverables, including the reinsurance recoverables allowance for doubtful accounts, estimates of written and earned premiums, reinsurance premium receivable, the fair value of investments, the valuation of goodwill and our deferred tax asset valuation allowance. Actual results could differ from those estimates. Certain financial information that normally is included in annual financial statements, including certain financial statement footnotes, prepared in accordance with GAAP, is not required for interim reporting purposes and has been condensed or omitted. These statements should be read in conjunction with the consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2010, filed with the Securities and Exchange Commission on February 28, 2011.

The interim financial information as of, and for the three and nine months ended, September 30, 2011 and 2010 is unaudited. However, in the opinion of management, the interim information includes all adjustments, consisting of normal recurring accruals, necessary for a fair statement of the results presented for the interim periods. The operating results for the interim periods are not necessarily indicative of the results to be expected for the full year. All significant intercompany amounts have been eliminated in consolidation. Certain amounts applicable to prior periods have been reclassified to conform to the presentation followed as of September 30, 2011.

During the first quarter of 2011, we evaluated the current operating structure of our Bermuda and London-based business segments, in conjunction with management changes impacting these operations. To more appropriately align our operating structure with the management changes, we concluded that operating activities associated with our London operations (our former International Specialty segment) will be principally managed and evaluated as a Lloyd's of London ("Lloyd's") market syndicate business, while our Bermuda operations (our former Reinsurance segment) will serve as the center for our international insurance and reinsurance business, including our product development and global strategic expansion initiatives. These changes resulted in our Bermuda operations now being identified as our International Specialty segment. Our London based operation will be focused on the management and growth of our Lloyd's syndicate operations and this segment will now be known as Syndicate 1200.

The balance sheet at December 31, 2010, has been derived from the audited consolidated financial statements of Argo Group at that date but does not include all of the information required by GAAP for complete financial statements.

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Underwriting, Acquisition And Insurance Expenses

9 Months Ended

Sep. 30, 2011

Underwriting, Acquisition And Insurance Expenses [Abstract]

Underwriting, Acquisition And Insurance Expenses

10. Underwriting, Acquisition and Insurance Expenses

Underwriting, acquisition and insurance expenses for the three and nine months ended September 30, 2011 and 2010 were as follows:

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
(in millions)	2011			2010		2011		2010
Commissions	$	49.0		$	46.6	$	143.1	$	163.3
General expenses		51.0			58.1		153.1		158.7
Premium taxes, boards and bureaus		8.0			6.9		19.7		19.5
		108.0			111.6		315.9		341.5
Net (deferral) amortization of policy acquisition costs		(1.7	)		4.2		0.0		19.2
Total underwriting, acquisition and insurance expenses	$	106.3		$	115.8	$	315.9	$	360.7

Included in general expenses for the nine months ended September 30, 2011 is $4.0 million of expense related to the write-off of certain uncollectible balances in reinsurance recoverables on paid losses. Partially offsetting these expenses were a recovery of $0.9 million for reinsurance recoverable amounts previously written off and a net reversal of $0.9 million to adjust the allowances for doubtful accounts on premiums receivable and reinsurance recoverables on paid losses.

Included in general expenses for the three and nine months ended September 30, 2010 was $2.9 million and $5.0 million, respectively, of bad debt expense due to management increasing the allowance for reinsurance recoverable balances in the first and third quarter of 2010.

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Reserves For Losses And Loss Adjustment Expenses (Narrative) (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Paid loss recoverables excluded from reinsurance recoverable on unpaid losses and LAE	$ 147.7	$ 241.0
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	1.6	(26.8)
LAE [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	(1.6)	(26.8)
Excess And Surplus Lines [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	17.8	9.3
Excess And Surplus Lines [Member] | General And Products Liability Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	13.2
Excess And Surplus Lines [Member] | Casualty And Professional Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		9.5
Excess And Surplus Lines [Member] | Property Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		0.2
Commercial Specialty [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	4.7	5.4
Reinsurance [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	3.6
Reinsurance [Member] | Short-Tail Non-Catastrophe Losses [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		12.2
Reinsurance [Member] | Hurricanes Ike And Gustav [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		14.5
International Specialty [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		1.2
International Specialty [Member] | Property Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		8.9
International Specialty [Member] | Liability Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		11.6
Syndicate 1200 Segment [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	14.8	2.7
Run-Off Lines [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	3.5	0.3
Run-Off Lines [Member] | Legacy Company Claims [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		8.2
Run-Off Lines [Member] | Workers Compensation Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		9.5
Directors And Officers Program [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	3.7
2010 New Zealand And Earthquake [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	1.4
General Liability [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	12.1
Automobile Liability Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	3.4
Professional Liability And Property Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	1.2
Property Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	4.6
Short-Tail Non-Catastrophe Losses [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	3.9
Hurricanes Ike And Gustav [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Paid loss recoverables excluded from reinsurance recoverable on unpaid losses and LAE		1.1
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	1.1
Liability Lines Of Business [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	10.1
Legacy Company Claims [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years		1.6
Workers Compensation [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	4.1
Asbestos And Environmental Lines [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	11.7
Asbestos Losses [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	8.2
Environmental Losses [Member]
Schedule Of Reserves For Losses And Loss Adjustment Expenses [Line Items]
Liability for unpaid claims and claims adjustment expense, incurred claims, prior years	$ 3.5

XML

Segment Information (Narrative) (Details) (USD $) In Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2011	Sep. 30, 2011	Sep. 30, 2011 International Specialty [Member]	Dec. 31, 2010 International Specialty [Member]
Business Segment Information [Line Items]
Assets associated with trade capital providers			$ 530.5	$ 651.8
Ceded premiums written	0	16.3
Ceded premiums earned	$ 2.7	$ 3.1

XML

Investments (Schedule Of Aging Of Unrealized Losses On The Company's Investments In Fixed Maturities, Equity Securities And Other Investments) (Details) (USD $) In Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2011		Dec. 31, 2010
Schedule of Investments [Line Items]
Fair Value	$ 807.2		$ 553.7
Unrealized Losses	54.3		19.7
U.S. Governments [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	29.0		55.2	[1]
Unrealized Losses	0.1		0.8	[1]
U.S. Governments [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	0		2.0	[1]
Unrealized Losses	0		0	[1]
U.S. Governments [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	29.0		57.2	[1]
Unrealized Losses	0.1		0.8	[1]
Non-U.S. Government [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	30.4
Unrealized Losses	2.5
Non-U.S. Government [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	0
Unrealized Losses	0
Non-U.S. Government [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	30.4
Unrealized Losses	2.5
Obligations Of States And Political Subdivisions [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	16.0		122.6
Unrealized Losses	0.1		2.6
Obligations Of States And Political Subdivisions [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	0.4		2.9
Unrealized Losses	0.6		0.3
Obligations Of States And Political Subdivisions [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	16.4		125.5
Unrealized Losses	0.7		2.9
Credit-Financial [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	118.5		53.7
Unrealized Losses	5.7		0.6
Credit-Financial [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	6.2		14.8
Unrealized Losses	0.9		1.1
Credit-Financial [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	124.7		68.5
Unrealized Losses	6.6		1.7
Credit-Industrial [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	121.4		44.3
Unrealized Losses	6.6		0.8
Credit-Industrial [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	0		0
Unrealized Losses	0		0
Credit-Industrial [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	121.4		44.3
Unrealized Losses	6.6		0.8
Credit-Utility [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	38.9		21.7
Unrealized Losses	2.3		0.4
Credit-Utility [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	0		0
Unrealized Losses	0		0
Credit-Utility [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	38.9		21.7
Unrealized Losses	2.3		0.4
CMO/MBS-Agency [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	22.4		26.5
Unrealized Losses	0.2		0.5
CMO/MBS-Agency [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	0		0
Unrealized Losses	0		0
CMO/MBS-Agency [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	22.4		26.5
Unrealized Losses	0.2		0.5
CMO/MBS-Non Agency [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	7.2		1.1
Unrealized Losses	0.2		0.3
CMO/MBS-Non Agency [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	4.3		6.6
Unrealized Losses	0.5		0.3
CMO/MBS-Non Agency [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	11.5		7.7
Unrealized Losses	0.7		0.6
CMBS [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	2.5	[2]	5.3
Unrealized Losses	0	[2]	0.1
CMBS [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	4.4	[2]	8.7
Unrealized Losses	0.3	[2]	0.8
CMBS [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	6.9	[2]	14.0
Unrealized Losses	0.3	[2]	0.9
ABS-Residential [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	4.9		6.4
Unrealized Losses	0.3		0.3
ABS-Residential [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	6.8		8.5
Unrealized Losses	1.7		2.0
ABS-Residential [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	11.7		14.9
Unrealized Losses	2.0		2.3
ABS-Non Residential [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	3.5	[2]	1.5	[1],[2]
Unrealized Losses	0	[2]	0	[1],[2]
ABS-Non Residential [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	0	[2]	0.7	[1],[2]
Unrealized Losses	0	[2]	0	[1],[2]
ABS-Non Residential [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	3.5	[2]	2.2	[1],[2]
Unrealized Losses	0	[2]	0	[1],[2]
Foreign Denominated, Governments [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	159.5		82.9
Unrealized Losses	9.0		3.1
Foreign Denominated, Governments [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	0		32.3
Unrealized Losses	0		1.8
Foreign Denominated, Governments [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	159.5		115.2
Unrealized Losses	9.0		4.9
Foreign Denominated, Credit [Member] | Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	77.0		26.1
Unrealized Losses	4.9		1.3
Foreign Denominated, Credit [Member] | One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	4.3		15.8
Unrealized Losses	0.2		1.8
Foreign Denominated, Credit [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	81.3		41.9
Unrealized Losses	5.1		3.1
Equity Securities [Member]
Schedule of Investments [Line Items]
Fair Value	121.7		9.8
Unrealized Losses	13.3		0.8
Equity Securities [Member] | Less Than One Year [Member]
Schedule of Investments [Line Items]
Fair Value	121.5		9.8
Unrealized Losses	13.2		0.8
Equity Securities [Member] | One Year or Greater [Member]
Schedule of Investments [Line Items]
Fair Value	0.2		0
Unrealized Losses	0.1		0
Other Investments [Member]
Schedule of Investments [Line Items]
Fair Value	(4.3)
Unrealized Losses	4.3
Other Investments [Member] | Less Than One Year [Member]
Schedule of Investments [Line Items]
Fair Value	(4.3)
Unrealized Losses	4.3
Other Investments [Member] | One Year or Greater [Member]
Schedule of Investments [Line Items]
Fair Value	0
Unrealized Losses	0
Short-Term Investments [Member]
Schedule of Investments [Line Items]
Fair Value	32.2		4.3	[2]
Unrealized Losses	0.6		0	[2]
Short-Term Investments [Member] | Less Than One Year [Member]
Schedule of Investments [Line Items]
Fair Value	32.2		4.3	[2]
Unrealized Losses	0.6		0	[2]
Short-Term Investments [Member] | One Year or Greater [Member]
Schedule of Investments [Line Items]
Fair Value	0		0	[2]
Unrealized Losses	0		0	[2]
Less Than One Year [Member]
Schedule of Investments [Line Items]
Fair Value	780.6		461.4
Unrealized Losses	50.0		11.6
Unrealized losses less, materiality level	0.1		0.1
Less Than One Year [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	631.2		447.3
Unrealized Losses	31.9		10.8
One Year or Greater [Member]
Schedule of Investments [Line Items]
Fair Value	26.6		92.3
Unrealized Losses	4.3		8.1
Unrealized losses less, materiality level			0.1
One Year or Greater [Member] | Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	26.4		92.3
Unrealized Losses	4.2		8.1
Fixed Maturities [Member]
Schedule of Investments [Line Items]
Fair Value	657.6		539.6
Unrealized Losses	$ 36.1		$ 18.9

[1] Unrealized losses one year or greater are less than $0.1 million.

[2] Unrealized losses less than one year are less than $0.1 million.

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Investments (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2011

Dec. 31, 2010

Investments [Abstract]

Schedule Of Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses And Fair Value Of Investments

September 30, 2011	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in millions)
Fixed maturities
USD denominated:
U.S. Governments (1)	$	502.7	$	14.3	$	0.1	$	516.9
Non-U.S. Governments		45.4		0.3		2.5		43.2
Obligations of states and political subdivisions		584.9		41.0		0.7		625.2
Credit-Financial		389.3		10.3		6.6		393.0
Credit-Industrial		406.4		17.9		6.6		417.7
Credit-Utility		165.4		6.5		2.3		169.6
Structured securities:
CMO/MBS-agency (2)		525.1		33.8		0.2		558.7
CMO/MBS-non agency		20.7		0.8		0.7		20.8
CMBS (3)		108.8		4.9		0.3		113.4
ABS-residential (4)		16.3		0.1		2.0		14.4
ABS-non residential		70.1		1.3		0.0		71.4
Foreign denominated:
Governments		221.8		7.6		9.0		220.4
Credit		97.1		2.3		5.1		94.3
Total fixed maturities		3,154.0		141.1		36.1		3,259.0
Equity securities		267.9		98.5		13.3		353.1
Other investments		217.7		0.7		4.3		214.1
Short-term investments		354.7		0.0		0.6		354.1
Total investments	$	3,994.3	$	240.3	$	54.3	$	4,180.3

⁽¹⁾  Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $72.3 million amortized cost, $73.2 million fair value.

⁽²⁾ Collateralized mortgage obligations/mortgage-backed securities ("CMO/MBS").

⁽³⁾ Commercial mortgage-backed securities ("CMBS").

⁽⁴⁾ Asset-backed securities ("ABS").

December 31, 2010	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in millions)
Fixed maturities
USD denominated:
U.S. Governments (1)	$	430.3	$	11.3	$	0.8	$	440.8
Non-U.S. Governments		6.2		0.2		0.0		6.4
Obligations of states and political subdivisions		630.6		25.6		2.9		653.3
Credit-Financial		370.5		12.3		1.7		381.1
Credit-Industrial		378.3		17.6		0.8		395.1
Credit-Utility		164.8		6.4		0.4		170.8
Structured securities:
CMO/MBS-agency (2)		665.7		33.9		0.5		699.1
CMO/MBS-non agency		37.4		1.5		0.6		38.3
CMBS (3)		143.6		6.3		0.9		149.0
ABS-residential (4)		19.3		0.1		2.3		17.1
ABS-non residential		127.7		2.4		0.0		130.1
Foreign denominated:
Governments		202.1		9.5		4.9		206.7
Credit		73.9		2.8		3.1		73.6
Total fixed maturities		3,250.4		129.9		18.9		3,361.4
Equity securities		208.8		116.5		0.8		324.5
Other investments		153.5		0.7		0.0		154.2
Short-term investments		375.2		0.1		0.0		375.3
Total investments	$	3,987.9	$	247.2	$	19.7	$	4,215.4

⁽¹⁾  Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $87.7 million amortized cost, $89.3 million fair value.

⁽²⁾  Collateralized mortgage obligations/mortgage-backed securities ("CMO/MBS").

⁽³⁾ Commercial mortgage-backed securities ("CMBS").

⁽⁴⁾ Asset-backed securities ("ABS").

Schedule Of Amortized Cost And Fair Values Of Fixed Maturity Investments, By Contractual Maturity

(in millions)	Amortized Cost		Fair Value
Due in one year or less	$	266.7	$	266.7
Due after one year through five years		1,307.4		1,339.2
Due after five years through ten years		698.2		727.3
Thereafter		140.7		147.1
Structured securities		741.0		778.7
Total	$	3,154.0	$	3,259.0

Schedule Of Aging Of Unrealized Losses On The Company's Investments In Fixed Maturities, Equity Securities And Other Investments

September 30, 2011	Less Than One Year					One Year or Greater				Total
	Fair			Unrealized		Fair		Unrealized		Fair			Unrealized
(in millions)	Value			Losses		Value		Losses		Value			Losses
Fixed maturities
USD denominated:
U.S. Governments	$	29.0		$	0.1	$	0.0	$	0.0	$	29.0		$	0.1
Non-U.S. Governments		30.4			2.5		0.0		0.0		30.4			2.5
Obligations of states and political subdivisions		16.0			0.1		0.4		0.6		16.4			0.7
Credit-Financial		118.5			5.7		6.2		0.9		124.7			6.6
Credit-Industrial		121.4			6.6		0.0		0.0		121.4			6.6
Credit-Utility		38.9			2.3		0.0		0.0		38.9			2.3
Structured securities:
CMO/MBS-agency		22.4			0.2		0.0		0.0		22.4			0.2
CMO/MBS-non agency		7.2			0.2		4.3		0.5		11.5			0.7
CMBS (1)		2.5			0.0		4.4		0.3		6.9			0.3
ABS-residential		4.9			0.3		6.8		1.7		11.7			2.0
ABS-non residential (1)		3.5			0.0		0.0		0.0		3.5			0.0
Foreign denominated:
Governments		159.5			9.0		0.0		0.0		159.5			9.0
Credit		77.0			4.9		4.3		0.2		81.3			5.1
Total fixed maturities		631.2			31.9		26.4		4.2		657.6			36.1
Equity securities		121.5			13.2		0.2		0.1		121.7			13.3
Other investments		(4.3	)		4.3		0.0		0.0		(4.3	)		4.3
Short-term investments		32.2			0.6		0.0		0.0		32.2			0.6
Total	$	780.6		$	50.0	$	26.6	$	4.3	$	807.2		$	54.3

⁽¹⁾  Unrealized losses less than one year are less than $0.1 million.

December 31, 2010	Less Than One Year				One Year or Greater				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
(in millions)	Value		Losses		Value		Losses		Value		Losses
Fixed maturities
USD denominated:
U.S. Governments (2)	$	55.2	$	0.8	$	2.0	$	0.0	$	57.2	$	0.8
Obligations of states and political subdivisions		122.6		2.6		2.9		0.3		125.5		2.9
Credit-Financial		53.7		0.6		14.8		1.1		68.5		1.7
Credit-Industrial		44.3		0.8		0.0		0.0		44.3		0.8
Credit-Utility		21.7		0.4		0.0		0.0		21.7		0.4
Structured securities:
CMO/MBS-agency		26.5		0.5		0.0		0.0		26.5		0.5
CMO/MBS-non agency		1.1		0.3		6.6		0.3		7.7		0.6
CMBS		5.3		0.1		8.7		0.8		14.0		0.9
ABS-residential		6.4		0.3		8.5		2.0		14.9		2.3
ABS-non residential (1) (2)		1.5		0.0		0.7		0.0		2.2		0.0
Foreign denominated:
Governments		82.9		3.1		32.3		1.8		115.2		4.9
Credit		26.1		1.3		15.8		1.8		41.9		3.1
Total fixed maturities		447.3		10.8		92.3		8.1		539.6		18.9
Equity securities		9.8		0.8		0.0		0.0		9.8		0.8
Short-term investments (1)		4.3		0.0		0.0		0.0		4.3		0.0
Total	$	461.4	$	11.6	$	92.3	$	8.1	$	553.7	$	19.7

⁽¹⁾  Unrealized losses less than one year are less than $0.1 million.

⁽²⁾  Unrealized losses one year or greater are less than $0.1 million.

Schedule Of The Company's Gross Realized Investment And Other Gains (Losses)

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
(in millions)	2011			2010			2011			2010
Realized gains
Fixed maturities	$	8.4		$	5.3		$	25.5		$	27.0
Equity securities		0.9			0.9			15.7			4.4
Short-term and other investments		3.9			5.2			12.6			6.9
Gross realized gains		13.2			11.4			53.8			38.3
Realized losses
Fixed maturities		(2.5	)		(2.0	)		(6.8	)		(7.4	)
Equity securities		0.0			(0.2	)		(0.7	)		(1.1	)
Short-term and other investments		(5.6	)		(0.1	)		(7.4	)		(0.4	)
Other-than-temporary impairment losses on fixed maturities		(0.1	)		0.0			(0.1	)		(0.8	)
Other-than-temporary impairment losses on equity securities		(1.1	)		0.0			(1.1	)		0.0
Gross realized losses		(9.3	)		(2.3	)		(16.1	)		(9.7	)
Net realized investment and other gains	$	3.9		$	9.1		$	37.7		$	28.6

Securities And Letters Of Credit Pledged To Lloyd's As The Company's Corporate Member's Capital

(in millions)
Letters of credit	$	127.5
Fixed maturities, at fair value		140.7
Short-term investments, at fair value		4.8
Total securities and letters of credit pledged to Lloyd's	$	273.0

Financial Assets Measured At Fair Value On A Recurring Basis

			Fair Value Measurements at Reporting Date Using
(in millions)	September 30, 2011		Level 1 (a)		Level 2 (b)		Level 3 (c)
Fixed maturities
USD denominated:
U.S. Governments	$	516.9	$	241.7	$	275.2	$	0.0
Non-U.S. Governments		43.2		0.0		43.2		0.0
Obligations of states and political subdivisions		625.2		0.0		625.2		0.0
Credit-Financial		393.0		0.0		392.3		0.7
Credit-Industrial		417.7		0.0		417.7		0.0
Credit-Utility		169.6		0.0		169.6		0.0
Structured securities:
CMO/MBS-agency		558.7		0.0		558.7		0.0
CMO/MBS-non agency		20.8		0.0		20.8		0.0
CMBS		113.4		0.0		113.4		0.0
ABS-residential		14.4		0.0		14.4		0.0
ABS-non residential		71.4		0.0		71.4		0.0
Foreign denominated:
Governments		220.4		0.0		220.4		0.0
Credit		94.3		0.0		94.3		0.0
Total fixed maturities		3,259.0		241.7		3,016.6		0.7
Equity securities		353.1		292.7		49.9		10.5
Other investments		102.0		0.0		102.0		0.0
Short-term investments		354.1		341.7		12.4		0.0
	$	4,068.2	$	876.1	$	3,180.9	$	11.2

^(a)  Quote prices in active markets for identical assets

^(b)  Significant other observable inputs

^(c)  Significant unobservable inputs

			Fair Value Measurements at Reporting Date Using
(in millions)	December 31, 2010			Level 1 (a)		Level 2 (b)		Level 3 (c)
Fixed maturities
USD denominated:
U.S. Governments	$	440.8		$	146.2	$	294.6	$	0.0
Non-U.S. Governments		6.4			0.0		6.4		0.0
Obligations of states and political subdivisions		653.3			0.0		653.3		0.0
Credit-Financial		381.1			0.0		380.4		0.7
Credit-Industrial		395.1			0.0		395.1		0.0
Credit-Utility		170.8			0.0		170.8		0.0
Structured securities:
CMO/MBS-agency		699.1			0.0		699.1		0.0
CMO/MBS-non agency		38.3			0.0		38.3		0.0
CMBS		149.0			0.0		149.0		0.0
ABS-residential		17.1			0.0		17.1		0.0
ABS-non residential		130.1			0.0		130.1		0.0
Foreign denominated:
Governments		206.7			0.0		206.7		0.0
Credit		73.6			0.0		73.6		0.0
Total fixed maturities		3,361.4			146.2		3,214.5		0.7
Equity securities		324.5			253.3		50.2		21.0
Other investments		91.0			0.0		91.0		0.0
Short-term investments		375.3			369.0		6.3		0.0
	$	4,152.2		$	768.5	$	3,362.0	$	21.7

^(a)  Quote prices in active markets for identical assets

^(b)  Significant other observable inputs

^(c)  Significant unobservable inputs

Schedule Of A Reconciliation Of The Beginning And Ending Balances For The Investments Categorized As Level 3

(in millions)	Credit Financial		Equity Securities			Total
Beginning balance, January 1, 2011	$	0.7	$	21.0		$	21.7
Transfers into Level 3		0.0		0.0			0.0
Transfers out of Level 3		0.0		0.0			0.0
Total gains or losses (realized/unrealized):
Included in net loss		0.0		9.6			9.6
Included in other comprehensive income		0.0		(7.6	)		(7.6	)
Purchases, issuances, sales, and settlements
Purchases		0.0		0.0			0.0
Issuances		0.0		0.0			0.0
Sales		0.0		(12.5	)		(12.5	)
Settlements		0.0		0.0			0.0
Ending balance, September 30, 2011	$	0.7	$	10.5		$	11.2
Amount of total gains or losses for the period included in net loss attributable to the change in unrealized gains or losses relating to assets still held at September 30, 2011	$	0.0	$	0.0		$	0.0

(in millions)	Credit Financial		Equity Securities			Total
Beginning balance, January 1, 2010	$	0.7	$	14.0		$	14.7
Transfers into Level 3		0.0		7.7			7.7
Transfers out of Level 3		0.0		(1.3	)		(1.3	)
Total gains or losses (realized/unrealized):
Included in net income		0.0		0.0			0.0
Included in other comprehensive income		0.0		1.8			1.8
Purchases, issuances, sales, and settlements
Purchases		0.0		0.0			0.0
Issuances		0.0		0.0			0.0
Sales		0.0		(1.2	)		(1.2	)
Settlements		0.0		0.0			0.0
Ending balance, December 31, 2010	$	0.7	$	21.0		$	21.7
Amount of total gains or losses for the period included in net income attributable to the change in unrealized gains or losses relating to assets still held at December 31, 2010	$	0.0	$	0.0		$	0.0

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Consolidated Balance Sheets (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Assets
Available-for-sale (cost: 2011 - $3,154.0; 2010 -$3,250.4)	$ 3,259.0	$ 3,361.4
Equity securities, at fair value (cost: 2011 - $267.9; 2010 - $208.8)	353.1	324.5
Other investments (cost: 2011 - $217.7; 2010 - $153.5)	214.1	154.2
Short-term investments, at fair value (cost: 2011 - $354.7; 2010 - $375.2)	354.1	375.3
Total investments	4,180.3	4,215.4
Cash	119.8	83.5
Accrued investment income	31.5	33.5
Premiums receivable	343.9	301.8
Reinsurance recoverables	1,107.0	1,203.9
Goodwill	153.8	153.8
Intangible assets, net of accumulated amortization	92.3	95.3
Current income taxes receivable, net	14.9	4.5
Deferred acquisition costs, net	136.2	139.7
Ceded unearned premiums	227.7	164.0
Other assets	95.3	93.1
Total assets	6,502.7	6,488.5
Liabilities and Shareholders' Equity
Reserves for losses and loss adjustment expenses	3,349.6	3,152.2
Unearned premiums	723.4	654.1
Accrued underwriting expenses	87.3	84.3
Ceded reinsurance payable, net	429.6	524.3
Funds held	34.3	33.4
Other indebtedness	66.9	65.0
Junior subordinated debentures	311.5	311.5
Deferred tax liabilities, net	9.4	10.5
Other liabilities	24.4	27.1
Total liabilities	5,036.4	4,862.4
Shareholders' equity:
Common shares - $1.00 par, 500,000,000 shares authorized; 31,274,221 and 31,206,796 shares issued and outstanding at September 30, 2011 and December 31, 2010, respectively	31.3	31.2
Additional paid-in capital	715.6	711.4
Treasury shares (4,544,329 and 3,363,560 shares at September 30, 2011 and December 31, 2010, respectively)	(148.4)	(111.6)
Retained earnings	753.7	847.5
Accumulated other comprehensive gain, net of taxes	114.1	147.6
Total shareholders' equity	1,466.3	1,626.1
Total liabilities and shareholders' equity	$ 6,502.7	$ 6,488.5

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Investments (Securities And Letters Of Credit Pledged To Lloyd's As The Company's Corporate Member's Capital) (Details) (USD $) In Millions	Sep. 30, 2011
Investments [Abstract]
Letters of credit	$ 127.5
Fixed maturities, at fair value	140.7
Short-term investments, at fair value	4.8
Total securities and letters of credit pledged to Lloyd's	$ 273.0

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Equity-Based Compensation (Fair Value Assumptions) (Details)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Equity-Based Compensation [Abstract]
Risk-free rate of return	0.89% to 2.07%	1.34% to 2.65%
Expected dividend yields	1.37% to 1.54%	1.55% to 1.65%
Expected award life (years)	5.04 to 5.07	1.00 to 5.06
Expected volatility	32.1% to 32.5%	31.3% to 31.8%

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Underwriting, Acquisition And Insurance Expenses (Narrative) (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Underwriting, Acquisition And Insurance Expenses [Abstract]
Bad debt expense	$ 2.9	$ 4.0	$ 5.0
Recovery of bad debts previously written off		0.9
Adjustment for doubtful accounts		$ 0.9

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Income Taxes (Narrative) (Details) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011
Income Tax Contingency [Line Items]
Total net deferred tax assets	$ 39.2
Capital loss carryforward	31.9
Net operating loss carryforward	18.7
Valuation allowance	48.6
Loss carryforward per year	2.8
Reduced valuation allowance	0.7
Increased valuation allowance	0.7
December 31, 2025 [Member]
Income Tax Contingency [Line Items]
Loss carryforwards, amounts expiring if not utilized	17.2
December 31, 2027 [Member]
Income Tax Contingency [Line Items]
Loss carryforwards, amounts expiring if not utilized	$ 1.5

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Income Taxes (Income Tax Provision) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Income Taxes [Abstract]
Current tax provision	$ 2.6	$ 12.9	$ 3.0	$ 31.9
Future tax deductions	3.6	(4.3)	10.3	(4.0)
Valuation allowance change	(0.2)	(0.2)	(0.7)	(0.7)
Income tax provision	$ 6.0	$ 8.4	$ 12.6	$ 27.2

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Equity-Based Compensation (Summary Of The Non-Vested Shares Activity Under The Amended Plan) (Details) (Amended Plan [Member], USD $)	9 Months Ended
	Sep. 30, 2011
Amended Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at January 1, 2011	459,434
Granted, Shares	0
Vested and issued, Shares	(9,808)
Expired or forfeited, Shares	(34,093)
Shares, Outstanding at September 30, 2011	415,533
Weighted-Average Grant Date Fair Value, Outstanding at January 1, 2011	$ 36.80
Granted, Weighted-Average Grant Date Fair Value	$ 0.00
Exercised, Weighted-Average Grant Date Fair Value	$ 29.25
Expired or forfeited, Weighted-Average Grant Date Fair Value	$ 49.17
Weighted-Average Grant Date Fair Value, Outstanding at September 30, 2011	$ 35.97

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Investments (Financial Assets Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Millions	Sep. 30, 2011		Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 4,180.3		$ 4,215.4
U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	516.9		440.8
U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	241.7	[1]	146.2	[1]
U.S. Governments [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	516.9	[2]	440.8	[3]
Non-U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	43.2		6.4
Non-U.S. Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
Non-U.S. Governments [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	43.2		6.4
Obligations Of States And Political Subdivisions [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	625.2		653.3
Obligations Of States And Political Subdivisions [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
Obligations Of States And Political Subdivisions [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	625.2		653.3
Credit-Financial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	393.0		381.1
Credit-Financial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
Credit-Financial [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	393.0		381.1
Credit-Industrial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	417.7		395.1
Credit-Industrial [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
Credit-Industrial [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	417.7		395.1
Credit-Utility [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	169.6		170.8
Credit-Utility [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
Credit-Utility [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	169.6		170.8
CMO/MBS-Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	558.7		699.1
CMO/MBS-Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
CMO/MBS-Agency [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	558.7	[4]	699.1	[4]
CMO/MBS-Non Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	20.8		38.3
CMO/MBS-Non Agency [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
CMO/MBS-Non Agency [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	20.8		38.3
CMBS [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	113.4		149.0
CMBS [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
CMBS [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	113.4	[5]	149.0	[5]
ABS-Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	14.4		17.1
ABS-Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
ABS-Residential [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	14.4	[6]	17.1	[6]
ABS-Non Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	71.4		130.1
ABS-Non Residential [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
ABS-Non Residential [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	71.4		130.1
Foreign Denominated, Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	220.4		206.7
Foreign Denominated, Governments [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
Foreign Denominated, Governments [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	220.4		206.7
Foreign Denominated, Credit [Member] | Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	94.3		73.6
Foreign Denominated, Credit [Member] | Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
Foreign Denominated, Credit [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	94.3		73.6
Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	353.1		324.5
Equity Securities [Member] | Available-For-Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	353.1		324.5
Equity Securities [Member] | Available-For-Sale [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	292.7	[1]	253.3	[1]
Other Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	214.1		154.2
Other Investments [Member] | Available-For-Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	102.0		91.0
Other Investments [Member] | Available-For-Sale [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	0	[1]	0	[1]
Short-Term Investments [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	354.1		375.3
Short-Term Investments [Member] | Available-For-Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	354.1		375.3
Short-Term Investments [Member] | Available-For-Sale [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	341.7	[1]	369.0	[1]
Available-For-Sale [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	4,068.2		4,152.2
Available-For-Sale [Member] | Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	3,259.0		3,361.4
Available-For-Sale [Member] | Fixed Maturities [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	241.7	[1]	146.2	[1]
Available-For-Sale [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	876.1	[1]	768.5	[1]
Fixed Maturities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 3,259.0		$ 3,361.4

[1] Quote prices in active markets for identical assets

[2] Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $72.3 million amortized cost, $73.2 million fair value.

[3] Includes corporate bonds backed by the Federal Deposit Insurance Corporation of $87.7 million amortized cost, $89.3 million fair value.

[4] Collateralized mortgage obligations/mortgage-backed securities ("CMO/MBS").

[5] Commercial mortgage-backed securities ("CMBS").

[6] Asset-backed securities ("ABS").