Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2013
Text Block [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X and, accordingly, do not include all of the information and disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for annual periods. These statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2012. The accompanying consolidated financial statements have not been audited by an independent registered public accounting firm in accordance with the standards of the Public Company Accounting Oversight Board (U.S.), but in the opinion of management such financial statements include all adjustments, consisting only of normal recurring adjustments, necessary for the fair statement of the Company's consolidated financial position and results of operations. All material intercompany balances and transactions have been eliminated. The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. As additional information becomes available or actual amounts become determinable, the recorded estimates are revised and reflected in operating results. The results of operations for the three and nine months ended September 30, 2013 may not be indicative of the results that may be expected for the year ending December 31, 2013. The December 31, 2012 consolidated balance sheet was derived from audited financial statements, but does not include all disclosures required by GAAP for annual periods. Certain amounts have been reclassified in the prior year's financial statements to conform to the current presentation. This includes the reclassification of accrued interest on surplus notes and senior notes from “Other liabilities” to “Long-term debt” on the Company's consolidated balance sheets. Refer to “Note 9: Debt ” for information about the amounts of this reclassification. These reclassifications had no impact on total revenues, expenses, assets, liabilities, shareholders' equity, operating cash flows, investing cash flows, or financing cash flows for all periods presented.
Recently Adopted Accounting Standards	Note 3: Recent Accounting Pronouncements Recently Adopted Accounting Standards Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (ASU 2013-02) In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013-02, “Comprehensive Income (Topic 220)—Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income” that requires an entity to present information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component and to present significant amounts reclassified out of AOCI by the respective line items of net income. The amendment only affects the Company's disclosures and does not affect the Company's consolidated balance sheets, results of operations, or cash flows. The Company adopted this standard in the first quarter of 2013. Disclosures about Offsetting Assets and Liabilities (ASU 2011-11) In December 2011, the FASB issued ASU 2011-11, “Balance Sheet (Topic 210)—Disclosures about Offsetting Assets and Liabilities”. ASU 2011-11 creates new disclosure requirements about the nature of the Company's rights of setoff and related arrangements associated with its financial instruments and derivative instruments. This amendment does not change the existing offsetting eligibility criteria or the permitted balance sheet presentation for those instruments that meet the eligibility criteria. The disclosure requirement was effective for the Company beginning in the first quarter of 2013. In January 2013, the FASB issued ASU 2013-01, “Balance Sheet (Topic 210)—Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities”. ASU 2013-01 clarifies that ASU 2011-11 applies only to derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with specific criteria contained in the FASB Accounting Standards Codification or subject to a master netting arrangement or similar agreement. These standards only affect the Company's disclosures and do not affect the Company's consolidated balance sheets, results of operations, or cash flows. The Company adopted this standard in the first quarter of 2013.
New Accounting Pronouncements Not Yet Adopted	Recent Accounting Developments Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (ASU 2013-11) In July 2013, the FASB issued ASU 2013-11, “Income Taxes (Topic 740)—Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”. ASU 2013-11 requires presentation of an unrecognized tax benefit (“UTB”) as a reduction to a deferred tax asset when a net operating loss (“NOL”) carryforward, a similar tax loss, or a tax credit carryforward exists in the same tax year and jurisdiction as the UTB. ASU 2013-11 does not affect the recognition or measurement of uncertain tax positions under “Income Taxes (Topic 740)” and does not affect any related tax disclosures. ASU 2013-11 is effective for interim and annual periods beginning January 1, 2014 with early adoption permitted. The Company currently presents any UTBs as a reduction to a deferred tax asset in accordance with ASU 2013-11 as all of its UTBs relate to the same tax years and jurisdictions in which NOLs exist, therefore, this standard will not affect the Company's consolidated balance sheets, results of operations, or cash flows.

Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2013

The accompanying unaudited consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X and, accordingly, do not include all of the information and disclosures required by accounting principles generally accepted in the United States of America (“GAAP”) for annual periods. These statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Annual Report on Form 10-K for the year ended December 31, 2012. The accompanying consolidated financial statements have not been audited by an independent registered public accounting firm in accordance with the standards of the Public Company Accounting Oversight Board (U.S.), but in the opinion of management such financial statements include all adjustments, consisting only of normal recurring adjustments, necessary for the fair statement of the Company's consolidated financial position and results of operations. All material intercompany balances and transactions have been eliminated.

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. As additional information becomes available or actual amounts become determinable, the recorded estimates are revised and reflected in operating results.

The results of operations for the three and nine months ended September 30, 2013 may not be indicative of the results that may be expected for the year ending December 31, 2013. The December 31, 2012 consolidated balance sheet was derived from audited financial statements, but does not include all disclosures required by GAAP for annual periods. Certain amounts have been reclassified in the prior year's financial statements to conform to the current presentation. This includes the reclassification of accrued interest on surplus notes and senior notes from “Other liabilities” to “Long-term debt” on the Company's consolidated balance sheets. Refer to “Note 9: Debt ” for information about the amounts of this reclassification. These reclassifications had no impact on total revenues, expenses, assets, liabilities, shareholders' equity, operating cash flows, investing cash flows, or financing cash flows for all periods presented.

Recently Adopted Accounting Standards

Note 3: Recent Accounting Pronouncements

Recently Adopted Accounting Standards

Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (ASU 2013-02)

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013-02, “Comprehensive Income (Topic 220)—Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income” that requires an entity to present information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component and to present significant amounts reclassified out of AOCI by the respective line items of net income. The amendment only affects the Company's disclosures and does not affect the Company's consolidated balance sheets, results of operations, or cash flows. The Company adopted this standard in the first quarter of 2013.

Disclosures about Offsetting Assets and Liabilities (ASU 2011-11)

In December 2011, the FASB issued ASU 2011-11, “Balance Sheet (Topic 210)—Disclosures about Offsetting Assets and Liabilities”. ASU 2011-11 creates new disclosure requirements about the nature of the Company's rights of setoff and related arrangements associated with its financial instruments and derivative instruments. This amendment does not change the existing offsetting eligibility criteria or the permitted balance sheet presentation for those instruments that meet the eligibility criteria. The disclosure requirement was effective for the Company beginning in the first quarter of 2013. In January 2013, the FASB issued ASU 2013-01, “Balance Sheet (Topic 210)—Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities”. ASU 2013-01 clarifies that ASU 2011-11 applies only to derivatives, repurchase agreements and reverse repurchase agreements, and securities borrowing and securities lending transactions that are either offset in accordance with specific criteria contained in the FASB Accounting Standards Codification or subject to a master netting arrangement or similar agreement. These standards only affect the Company's disclosures and do not affect the Company's consolidated balance sheets, results of operations, or cash flows. The Company adopted this standard in the first quarter of 2013.

New Accounting Pronouncements Not Yet Adopted

Recent Accounting Developments

Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (ASU 2013-11)

In July 2013, the FASB issued ASU 2013-11, “Income Taxes (Topic 740)—Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists”. ASU 2013-11 requires presentation of an unrecognized tax benefit (“UTB”) as a reduction to a deferred tax asset when a net operating loss (“NOL”) carryforward, a similar tax loss, or a tax credit carryforward exists in the same tax year and jurisdiction as the UTB. ASU 2013-11 does not affect the recognition or measurement of uncertain tax positions under “Income Taxes (Topic 740)” and does not affect any related tax disclosures. ASU 2013-11 is effective for interim and annual periods beginning January 1, 2014 with early adoption permitted. The Company currently presents any UTBs as a reduction to a deferred tax asset in accordance with ASU 2013-11 as all of its UTBs relate to the same tax years and jurisdictions in which NOLs exist, therefore, this standard will not affect the Company's consolidated balance sheets, results of operations, or cash flows.