10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

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

For the quarterly period ended March 31, 2012

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 NO. 000-26937

QUEST SOFTWARE, INC.

(Exact name of registrant as specified in its charter)

Delaware	33-0231678
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

5 Polaris Way Aliso Viejo, California	92656
(Address of principal executive offices)	(Zip code)

Registrant’s telephone number, including area code: (949) 754-8000

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	¨  (Do not check if a smaller reporting company)	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

The number of shares outstanding of the registrant’s Common Stock as of May 3, 2012, was 84,329,361.

QUEST SOFTWARE, INC.

QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS

		Page Number
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets		3
	Condensed Consolidated Income Statements		4
	Condensed Consolidated Statements of Comprehensive Income		5
	Condensed Consolidated Statements of Cash Flows		6
	Notes to Condensed Consolidated Financial Statements		7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		25
	Overview		25
	Results of Operations		27
	Liquidity and Capital Resources		31
	Recently Adopted Accounting Pronouncements		33
	Critical Accounting Policies and Estimates		33
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		34
Item 4.	Controls and Procedures		36
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings		37
Item 1A.	Risk Factors		37
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		38
Item 6.	Exhibits		39
Signatures			40

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements

QUEST SOFTWARE, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except par value)

(Unaudited)

	March 31 2012		December 31 2011
ASSETS
Current assets:
Cash and cash equivalents	$	220,006	$	192,165
Short-term investments		43,194		36,774
Accounts receivable, net of allowances of $4,385 and $6,369 at March 31, 2012 and December 31, 2011, respectively		137, 100		201,636
Prepaid expenses and other current assets		55,389		45,846
Deferred income taxes, net		21,388		21,647
Total current assets		477,077		498,068
Property and equipment, net		97,537		94,602
Long-term investments		19,166		24,832
Intangible assets, net		139,267		150,386
Goodwill		862,103		858,444
Deferred income taxes, net		20,891		17,559
Other assets		57,242		55,627
Total assets	$	1,673,283	$	1,699,518
LIABILITIES AND EQUITY
Current liabilities:
Accounts payable	$	11,666	$	11,723
Accrued compensation		50,020		56,148
Other accrued expenses		41,379		42,845
Income taxes payable		14,654		14,482
Loans payable		71,614		91,597
Deferred revenue		368,884		388,788
Total current liabilities		558,217		605,583
Long-term liabilities:
Deferred revenue		110,341		111,050
Income taxes payable		51,276		51,276
Loans payable		32,528		32,133
Other long-term liabilities		7,666		9,942
Total long-term liabilities		201,811		204,401
Total liabilities		760,028		809,984
Commitments and contingencies (Note 17)
Redeemable noncontrolling interest		22,000		22,000
Equity:
Quest Software, Inc. stockholders’ equity:
Preferred stock, $0.001 par value, 10,000 shares authorized; no shares issued or outstanding		—		—
Common stock, $0.001 par value, 200,000 shares authorized; 84,066 and 83,148 shares issued and outstanding at March 31, 2012 and December 31, 2011, respectively		84		83
Additional paid-in-capital		541,811		521,653
Retained earnings		335,725		333,057
Accumulated other comprehensive income (loss)		753		(208	)
Total Quest Software Inc. stockholders’ equity		878,373		854,585
Noncontrolling interest		12,882		12,949
Total equity		891,255		867,534
Total liabilities and equity	$	1,673,283	$	1,699,518

The accompanying notes are an integral part of these condensed consolidated financial statements.

3

QUEST SOFTWARE, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED INCOME STATEMENTS

(In thousands, except per share data)

(Unaudited)

	Three Months Ended March 31
	2012			2011
Revenues:
Licenses	$	69,983		$	66,735
Services		142,213			121,422
Total revenues		212,196			188,157
Cost of revenues:
Licenses		2,883			1,784
Services		24,002			20,965
Amortization of purchased technology		6,968			4,650
Total cost of revenues		33,853			27,399
Gross profit		178,343			160,758
Operating expenses:
Sales and marketing		85,962			81,729
Research and development		46,375			41,723
General and administrative		32,462			28,193
Amortization of other purchased intangible assets		8,291			3,747
Total operating expenses		173,090			155,392
Income from operations		5,253			5,366
Other (expense) income, net		(874	)		1,156
Income before income tax provision		4,379			6,522
Income tax provision		1,778			3,151
Net income		2,601			3,371
Net loss attributable to noncontrolling interest		67			—
Net income attributable to Quest Software, Inc.	$	2,668		$	3,371
Net income per share attributable to Quest Software, Inc. stockholders:
Basic	$	0.03		$	0.04
Diluted	$	0.03		$	0.04
Weighted-average common shares outstanding:
Basic		83,424			92,303
Diluted		85,102			95,112

The accompanying notes are an integral part of these condensed consolidated financial statements.

4

QUEST SOFTWARE, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(In thousands)

(Unaudited)

	Three Months Ended March  31
	2012		2011
Net income	$	2,601	$	3,371
Other comprehensive income (loss):
Unrealized income (loss) on foreign currency hedges, net of tax		709		(407	)
Unrealized income (loss) on available-for-sale securities, net of tax		252		(22	)
Comprehensive income		3,562		2,942
Comprehensive loss attributable to noncontrolling interest		67		—
Comprehensive income attributable to Quest Software, Inc	$	3,629	$	2,942

The accompanying notes are an integral part of these condensed consolidated financial statements.

5

QUEST SOFTWARE, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Three Months Ended March 31
	2012			2011
Cash flows from operating activities:
Net income	$	2,601		$	3,371
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		15,751			12,429
Compensation expense associated with stock-based payments		6,083			7,413
Impairment losses on intangible assets		3,365			—
Unrealized foreign currency gains, net		(3,429	)		(3,346	)
Deferred income taxes		406			(221	)
Excess tax benefit related to stock-based compensation		(266	)		(1,481	)
Other non-cash adjustments, net		301			567
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable		65,929			61,594
Prepaid expenses and other current assets		(2,500	)		3,044
Other assets		(132	)		1,744
Accounts payable		2,280			786
Accrued compensation		(6,883	)		(10,722	)
Other accrued expenses		(385	)		1,998
Income taxes payable		(7,682	)		(692	)
Deferred revenue		(20,614	)		(4,792	)
Other liabilities		(2,577	)		(2,048	)
Net cash provided by operating activities		52,248			69,644
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired		(7,566	)		(70,724	)
Purchases of property and equipment		(8,129	)		(4,427	)
Change in restricted cash		937			(11,331	)
Purchases of cost method investments		(2,106	)		(20,203	)
Purchases of investment securities		(6,007	)		(4,067	)
Sales and maturities of investment securities		5,477			29,061
Contributions on equity method investment		(1,926	)		—
Change in notes receivable		(90	)		(350	)
Net cash used in investing activities		(19,410	)		(82,041	)
Cash flows from financing activities:
Proceeds from loans payable		561			—
Repayment of loans payable		(20,148	)		(103	)
Repurchase of common stock		—			(84,359	)
Repayment of capital lease obligations		(131	)		(25	)
Cash paid for line of credit fees		—			(500	)
Proceeds from the exercise of stock options		14,751			20,248
Excess tax benefit related to stock-based compensation		266			1,481
Net cash used in financing activities		(4,701	)		(63,258	)
Effect of exchange rate changes on cash and cash equivalents		(296	)		4,537
Net increase (decrease) in cash and cash equivalents		27,841			(71,118	)
Cash and cash equivalents, beginning of period		192,165			356,533
Cash and cash equivalents, end of period	$	220,006		$	285,415
Supplemental disclosures of consolidated cash flow information:
Cash paid for interest	$	911		$	782
Cash paid for income taxes	$	8,742		$	721

The accompanying notes are an integral part of these condensed consolidated financial statements.

6

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1 — ORGANIZATION, PROPOSED MERGER AND BASES OF PRESENTATION

Quest Software, Inc. was incorporated in California in 1987 and reincorporated in Delaware in 2009. We are a leading developer and vendor of Database Management, Performance Monitoring, Data Protection, User Workspace Management, Windows Server Management, and Identity and Access Management software products. We also provide consulting, training, and support services to our customers. References to “Quest,” “Quest Software,” the “Company,” “we,” “us,” or “our” refer to Quest Software, Inc. and its consolidated subsidiaries.

Our accompanying unaudited condensed consolidated financial statements as of March 31, 2012 and for the three months ended March 31, 2012 and 2011 reflect all adjustments (consisting of normal recurring accruals) that, in the opinion of management, are necessary for a fair presentation of the results for the interim periods presented. These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.

The information included in this Quarterly Report on Form 10-Q should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and “Quantitative and Qualitative Disclosures About Market Risk” included in Quest’s Annual Report on Form 10-K for the year ended December 31, 2011 (“2011 Form 10-K”), and the “Corrected Consolidated Financial Statements and Notes to the Consolidated Financial Statements” included in our Current Report on Form 8-K filed on May 10, 2012. The results for the interim periods presented are not necessarily indicative of the results that may be expected for any future period.

Pending Proposed Merger Transaction

On March 8, 2012, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Expedition Holding Company, Inc., a Delaware corporation (“Parent”), and Expedition Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent, pursuant to which Parent will acquire, subject to certain exceptions, all of the outstanding shares of the Company’s common stock for a purchase price of $23.00 per share in cash. Parent and Merger Sub are beneficially owned by funds affiliated with Insight Venture Management, LLC, a Delaware limited liability company (“Insight”).

For terms of the Merger Agreement, including circumstances under which the Merger Agreement can be terminated and the ramifications of such a termination, as well as other terms and conditions, refer to the Merger Agreement filed as Exhibit 2.1 to our Current Report on Form 8-K with the Securities and Exchange Commission on March 9, 2012.

The merger is currently expected to close in the third quarter of this year, and is subject to customary closing conditions as well as approval and adoption of the Merger Agreement by the Company’s stockholders (including approval by a majority of the outstanding unaffiliated shares of common stock, which excludes any shares of common stock held by Parent, Merger Sub and Vincent Smith, President, Chief Executive Officer and Chairman of the Board, and certain related trusts). If completed, the merger will result in the Company becoming a privately-held company, and its shares of common stock will no longer be listed on any public market. No assurance can be given that the merger will be completed.

Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods

We maintain positions in certain foreign currencies which may at times create unrealized gains or losses. Unrealized foreign currency gains/losses should be presented as an adjustment to reconcile net income to net cash provided by operating activities in our consolidated statement of cash flows. Effective during the third quarter of 2011, we presented such unrealized foreign currency gains/losses in our consolidated statement of cash flows. This change impacts our cash flow presentation and does not impact earnings or cash balances. Management has concluded that this change of presentation is not material to any periods affected. The following represents the details of the impact to our previously reported consolidated statement of cash flows to conform to the current year presentation (in thousands):

7

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

	Three Months Ended March 31, 2011
	As  Previously Reported		As Adjusted		Impact
Unrealized foreign currency gains, net	$	—	$	(3,459)	$	(3,459	)
Changes in operating assets and liabilities, net of effects of acquisitions		48,912		50,688		1,776
Net cash provided by operating activities		71,327		69,644		(1,683	)
Effect of exchange rate changes in cash and cash equivalents		2,854		4,537		1,683
Net impact						—

Correction of a Tax Error Related to Prior Periods

During March 2012, we discovered an error in the historical Australian income tax returns of our wholly-owned subsidiary, Quest Software Pty. Ltd., related to an incorrectly claimed research and development benefit that resulted in a cumulative liability including income tax, interest and penalties of $14.5 million. The error impacts multiple prior periods back to the year ended December 31, 1999. We have concluded that this error has not caused a material misstatement within any previously issued consolidated financial statement for any period. However, if the cumulative effect of the income taxes, interest and penalties were to be included solely within the first quarter of 2012, it would be material to that quarter’s results. Thus, after considering Staff Accounting Bulletin Release No. 108, “Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements”, we have corrected the Consolidated Financial Statements for the fiscal years ended December 31, 2011, 2010, and 2009 in our Current Report on Form 8-K filed on May 10, 2012, which prior to the corrections were filed previously with Quest’s Annual Report on Form 10-K for the period ended December 31, 2011.

In connection with this tax correction, we have presented in this Form 10-Q the corrected consolidated balance sheet as of December 31, 2011, the corrected consolidated income statement for the three months ended March 31, 2011 and the corrected consolidated statement of cash flows for the three months ended March 31, 2011. The following represents the impact of the tax correction to our previously reported consolidated financial statements (in thousands, except per share data):

Corrected Consolidated Balance Sheet:

	December 31, 2011
	As  Previously Reported		As Corrected		Increase/ (Decrease)
Deferred income taxes, net – current	$	19,780	$	21,647	$	1,867
Total current assets		496,201		498,068		1,867
Total assets		1,697,651		1,699,518		1,867
Income taxes payable – current		—		14,482		14,482
Total current liabilities		591,101		605,583		14,482
Total liabilities		795,502		809,984		14,482
Retained earnings		345,672		333,057		(12,615	)
Total Quest Software Inc. stockholders’ equity		867,200		854,585		(12,615	)
Total equity		880,149		867,534		(12,615	)
Total liabilities and equity		1,697,651		1,699,518		1,867

8

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

Corrected Consolidated Income Statement:

	Three Months Ended March 31, 2011
	As  Previously Reported		As Corrected		Increase/ (Decrease)
Other income, net	$	1,269	$	1,156	$	(113	)
Income before income tax provision		6,635		6,522		(113	)
Income tax provision		3,006		3,151		145
Net income		3,629		3,371		(258	)
Net income attributable to Quest Software, Inc.		3,629		3,371		(258	)
Net income per share:
Basic	$	0.04	$	0.04	$	—
Diluted	$	0.04	$	0.04	$	—

Corrected Consolidated Statement of Cash Flows:

	Three Months Ended March 31, 2011
	As Adjusted  (1)			As Corrected			Increase/ (Decrease)
Net income	$	3,629		$	3,371		$	(258	)
Unrealized foreign currency gains, net		(3,459	)		(3,346	)		113
Changes in operating assets and liabilities:
Deferred income taxes		(142	)		(221	)		(79	)
Income taxes payable		(916	)		(692	)		224
Net cash provided by operating activities		69,644			69,644		$	—

(1) Refer to the above section “Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods”.

On April 27, 2012, Quest Software Pty. Ltd., filed a voluntary disclosure request with the Australian Tax Office (“ATO”) and paid all outstanding taxes due for all impacted tax years which amounted to $6.5 million. Further discussions with the ATO will focus on negotiating interest and penalty amounts to be remitted as a result of the understated taxes.

NOTE 2 — RECENT ACCOUNTING PRONOUNCEMENTS

In May 2011, the Financial Accounting Standards Board (“FASB”) issued amendments to its accounting guidance on fair value measurement. The amendments provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. The amendments change certain fair value measurement principles and enhance the disclosure requirements about fair value measurements. This guidance is effective during interim and annual periods beginning after December 15, 2011 and should be applied prospectively. There was no material impact from our adoption of this guidance to our consolidated financial statements.

In June 2011, the FASB issued amendments to its accounting guidance on comprehensive income. The amendments require an entity to present the total of comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendments eliminate the option to present the components of other comprehensive income as part of the statement of equity. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. We have presented separate consolidated statements of comprehensive income consecutively after the consolidated income statements upon adoption of this guidance. In December 2011, the FASB issued amendments to defer the presentation on the face of the financial statements the reclassification adjustments out of accumulated other comprehensive income on the components of net income and other comprehensive income for all periods presented.

9

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

In September 2011, the FASB issued amendments to its accounting guidance on testing goodwill for impairment. The amendments allow entities to use a qualitative approach to test goodwill for impairment. This permits an entity to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If it is concluded that it is more likely than not that the fair value of a reporting unit is less than its carrying value, it is necessary to perform the currently prescribed two-step goodwill impairment test. Otherwise, the two-step goodwill impairment test is not required. This guidance is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. There was no impact from our adoption of this guidance to our consolidated financial statements.

In December 2011, the FASB issued amendments to disclosures about offsetting assets and liabilities. The amendments require the disclosure of both gross information and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. This scope would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. This guidance is effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. The disclosures required by the amendments should be provided retrospectively for all comparative periods presented. We do not anticipate any impact from our adoption of this guidance to our consolidated financial statements as these amendments only refer to enhanced disclosures.

NOTE 3 — ACQUISITIONS

2012 Acquisitions

During the quarter ended March 31, 2012, we completed an acquisition that has been accounted for as business combination. The purchase price for this transaction was approximately $6 million. The preliminary allocation of purchase price was primarily to goodwill and other intangible assets for $2.7 million and $3.8 million, respectively. The preliminary allocation of purchase price was based upon valuation information and estimates and assumptions available at the time of filing. Our estimates and assumptions are subject to change and preliminary valuations are often finalized after a reporting period. The areas of the purchase price allocation that are still not finalized and are subject to change within the measurement period relate to the valuation of certain intangible assets, income taxes and the resulting goodwill.

Actual results of operations of this acquisition are included in our condensed consolidated financial statements from the effective date of the acquisition. This acquisition is not material, and therefore supplemental pro forma information is not presented for the quarters ended March 31, 2012 and 2011.

2011 Acquisitions

BakBone Software Incorporated – In January 2011, we acquired 100 percent of the voting equity interest of BakBone Software Incorporated (“BakBone”), a publicly-held provider of data protection software, for cash consideration of approximately $56 million. BakBone provides us with additional technologies and products to provide data protection solutions across heterogeneous physical, virtual and application-level environments.

The acquisition has been accounted for as a business combination and the purchase price was allocated primarily to goodwill and other intangible assets. Actual results of operations of BakBone are included in our consolidated financial statements from the date of acquisition. Our final allocation of the purchase price to assets and liabilities based upon fair value determinations was as follows (in thousands):

Current assets	$	12,479
Acquired technologies with a weighted average useful life of 5.2 years		24,500
In-process research and development		400
Customer relationships with a useful life of 4.0 years		11,300
Trademarks and trade names with a useful life of 10.0 years		1,800
Goodwill		18,690
Deferred income tax assets – non-current		9,872
Other non-current assets		2,419
Current liabilities		(6,328	)
Deferred revenue – current		(9,383	)
Deferred revenue – non-current		(9,491	)
Other long-term liabilities		(278	)
Total purchase price	$	55,980

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QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

The intangible assets will be amortized over the pattern in which the expected economic benefits of the intangible assets are realized, which in general is correlated with the cash flows generated from such assets. We acquired an in-process research and development (“IPR&D”) project and the value assigned to the IPR&D was determined utilizing the income approach by determining cash flow projections relating to the project. We applied a discount rate of 28% to derive the value of the IPR&D project. The IPR&D project will be assessed for impairment until completed. Upon completion, the project will be amortized over its estimated useful life, as described above. The goodwill associated with this acquisition is reported within our Licenses, Maintenance Services and Professional Services segments of our business, and is not expected to be deductible for tax purposes. The goodwill allocation of 45% to Licenses, 52% to Maintenance Services and 3% to Professional Services is based on both historical and projected relative contribution from Licenses, Maintenance Services and Professional Services revenues. Goodwill results from expected synergies from the transaction, including complementary products that will enhance our overall product portfolio, and opportunities within new markets, which we believe will result in incremental revenue and profitability.

This acquisition is not material, and therefore supplemental pro forma information is not presented for the quarter ended March 31, 2011.

NOTE 4 — GEOGRAPHIC AND SEGMENT REPORTING

Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by our chief operating decision maker, or decision-making group, in assessing performance and deciding how to allocate resources. Our reportable operating segments are Licenses, Maintenance Services and Professional Services. The Licenses segment develops and markets licenses to use our software products. The Maintenance Services segment provides after-sale support for software products. The Professional Services segment provides consulting and fee-based training related to our software products.

We do not separately allocate operating expenses to these segments, nor do we allocate specific assets to these segments. Therefore, segment information reported includes only revenues, cost of revenues, and gross profit.

Reportable segment data for the three months ended March 31, 2012 and 2011 is as follows (in thousands):

	Licenses		Maintenance Services		Professional Services		Total
Three months ended March 31, 2012:
Revenues	$	69,983	$	126,820	$	15,393	$	212,196
Cost of revenues		9,851		11,820		12,182		33,853
Gross profit	$	60,132	$	115,000	$	3,211	$	178,343
Three months ended March 31, 2011:
Revenues	$	66,735	$	108,066	$	13,356	$	188,157
Cost of revenues		6,434		10,011		10,954		27,399
Gross profit	$	60,301	$	98,055	$	2,402	$	160,758

Revenues are attributed to geographic areas based on the location of the Quest entity from which the products or services were invoiced. Revenues and long-lived assets concerning principal geographic areas in which we operate are as follows (in thousands):

	United States		Ireland		Other International  (2)		Total
Three months ended/As of March 31, 2012:
Revenues	$	123,971	$	39,739	$	48,486	$	212,196
Long-lived assets (1)		122,580		17,506		14,693		154,779
Three months ended/As of March 31, 2011:
Revenues	$	112,747	$	30,964	$	44,446	$	188,157
Long-lived assets (1)		103,637		263		14,112		118,012

(1) Includes property and equipment, net and other assets

(2) No single location within Other International accounts for greater than 10% of total revenues

11

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

NOTE 5 — CASH AND CASH EQUIVALENTS AND INVESTMENTS

The following table summarizes our cash and cash equivalents and investments by balance sheet classification at the dates indicated (in thousands):

	March 31, 2012				December 31, 2011
	Amortized Cost		Fair Value (1)		Amortized Cost		Fair Value (1)
Cash and cash equivalents	$	220,006	$	220,006	$	192,165	$	192,165
Short-term investments		43,115		43,194		36,688		36,774
Long-term investments		19,014		19,166		24,964		24,832
Total cash and cash equivalents and investments	$	282,135	$	282,366	$	253,817	$	253,771

(1) See Note 16 – Fair Value Measurements for details regarding fair value measurements.

The following table summarizes our investments by investment category at the dates indicated (in thousands):

	March 31, 2012
Investment category:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
US treasury securities	$	9,496	$	—	$	(1	)	$	9,495
US agency securities		3,515		17		—			3,532
Corporate notes/bonds		47,397		231		(16	)		47,612
Certificates/term deposits		1,721		—		—			1,721
Total investments	$	62,129	$	248	$	(17	)	$	62,360

	December 31, 2011
Investment category:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
US treasury securities	$	6,920	$	1	$	—		$	6,921
US agency securities		5,526		25		—			5,551
Corporate notes/bonds		47,600		124		(196	)		47,528
Certificates/term deposits		1,606		—		—			1,606
Total investments	$	61,652	$	150	$	(196	)	$	61,606

The average remaining maturities of the Company’s short-term and long-term available-for-sale investments at March 31, 2012 were approximately 5 months and 21 months, respectively.

12

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

NOTE 6 — PROPERTY AND EQUIPMENT, NET

Net property and equipment consisted of the following (in thousands):

	March 31			December 31
	2012			2011
Building	$	39,273		$	39,297
Furniture and fixtures		17,324			17,249
Machinery and equipment		9,425			9,163
Computer equipment		65,180			65,331
Computer software		52,648			51,541
Leasehold improvements		18,765			18,615
Land		16,317			16,317
Construction in progress – building		10,458			6,427
		229,390			223,940
Less accumulated depreciation and amortization		(131,853	)		(129,338	)
Property and equipment, net	$	97,537		$	94,602

Total depreciation and amortization expense related to property and equipment was $3.7 million and $3.9 million for the three months ended March 31, 2012 and 2011, respectively.

NOTE 7 — GOODWILL AND INTANGIBLE ASSETS, NET

The changes in the carrying amount of goodwill by reportable operating segment (refer to Note 4 – Geographic and Segment Reporting for discussion of our reportable operating segments) for the three months ended March 31, 2012 are as follows (in thousands):

	Licenses			Maintenance Services			Professional Services			Total
Balance as of December 31, 2011	$	542,243		$	307,881		$	8,320		$	858,444
Acquisitions		—			3,817			—			3,817
Adjustments		(59	)		(94	)		(5	)		(158	)
Balance as of March 31, 2012	$	542,184		$	311,604		$	8,315		$	862,103

Intangible assets, net are comprised of the following (in thousands):

	March 31, 2012							December 31, 2011
	Gross Carrying Amount		Accumulated Amortization and Impairments			Net		Gross Carrying Amount		Accumulated Amortization  and Impairments			Net
Acquired technology and IPR&D (1)	$	247,654	$	(165,042	)	$	82,612	$	244,680	$	(157,944	)	$	86,736
Customer relationships		124,018		(75,126	)		48,892		122,918		(67,193	)		55,725
Non-compete agreements		15,268		(14,058	)		1,210		15,068		(13,896	)		1,172
Trademarks and trade names (2)		19,596		(13,043	)		6,553		19,596		(12,843	)		6,753
	$	406,536	$	(267,269	)	$	139,267	$	402,262	$	(251,876	)	$	150,386

(1) IPR&D projects were identified and valued related to our acquisitions. These projects are continually assessed for impairment. Upon completion, these projects will be amortized over their estimated useful life.

(2) Trademarks and trade names include $0.8 million in trade names related to our acquisition of PacketTrap that have an indefinite useful life, and as such are not being amortized.

During the first quarter of 2012, customer relationships of $3.4 million related to ChangeBase became impaired. The impairment loss of $3.4 million was recorded in Amortization of other purchased intangible assets in our condensed consolidated income statements.

13

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

Amortization expense for intangible assets was $12.0 million and $8.6 million for the three months ended March 31, 2012 and 2011, respectively.

Estimated annual amortization expense related to amortizing intangible assets reflected on our March 31, 2012 condensed consolidated balance sheet is as follows (in thousands):

	Estimated Annual Amortization Expense
2012 (remaining 3 quarters)	$	31,116
2013		29,872
2014		27,295
2015		18,691
2016 and thereafter		31,493
Total accumulated amortization	$	138,467

NOTE 8 — COST METHOD INVESTMENTS

Our investments in early stage private companies are accounted for under the cost method given that we do not have the ability to exercise significant influence over these companies. The fair value of our cost method investments is not estimated if there are no identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investment. We determined that it is not practicable to estimate the fair value of our cost method investments since these investments were made in privately-held companies that are not subject to the same disclosure regulations as U.S. public companies, and, as such, the basis for an estimated fair value is subject to the completeness, quality, timing and accuracy of data received from these private companies. Our cost method investments are carried at $48.2 million and $46.1 million as part of Other assets in our condensed consolidated balance sheets at March 31, 2012 and December 31, 2011, respectively.

NOTE 9 — LOANS PAYABLE

In February 2011, our line of credit agreement with Wells Fargo Capital Finance, LLC (formerly known as Wells Fargo Foothill, LLC), as arranger, administrative agent and lender, was amended and renewed for a subsequent five-year term (the “Amended Credit Agreement”). The Amended Credit Agreement allows for cash borrowings and letters of credit under a secured revolving credit facility of up to a maximum of $100.0 million. Interest will accrue based on a floating rate based on, at the Company’s election, (i) LIBOR (subject to reserve requirements) or (ii) the greater of (a) the Federal Funds Rate plus  ¹/2% or (b) Wells Fargo’s prime rate, in each case, plus an applicable margin of 1.5% as of March 31, 2012. The Amended Credit Agreement includes limitations on the Company’s ability to, among other things, incur debt, grant liens, make acquisitions and other investments, make certain restricted payments such as dividend payments, and dispose of assets. The Amended Credit Agreement is secured by substantially all of the Company’s assets, subject to certain exceptions. Fees associated with this amended line of credit were approximately $0.5 million and will be amortized over the life of the credit agreement as interest expense. As of March 31, 2012, we have a $71 million balance outstanding under this line of credit recorded as current loans payable in our consolidated balance sheets.

In August 2009, we entered into a loan agreement with Mutual of Omaha Bank whereby we borrowed an aggregate principal amount of $34 million. The loan is secured by our real property at our headquarters in Aliso Viejo, California. We have used the proceeds from the loan for working capital and other general corporate purposes. The loan matures in five years, during which time we will make equal monthly principal and interest payments at a 7.03% interest rate on a fixed rate, 25-year amortization schedule. Events of default include, among other things, payment defaults, breaches of covenants and bankruptcy events. In the case of a continuing event of default, the lender may, among other things, accelerate the payment of any unpaid principal and interest amounts, increase the then-current interest rate by 5% and foreclose on the real estate collateral. As of March 31, 2012, we have a $32.6 million balance outstanding with $0.6 million recorded as current and $32.0 million recorded as long-term portion of loans payable in our consolidated balance sheets.

We were in compliance with all debt-related covenants as of March 31, 2012.

14

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

NOTE 10 — OTHER (EXPENSE) INCOME, NET

Other (expense) income, net consists of the following (in thousands):

	Three Months Ended March 31
	2012			2011
Interest income	$	525		$	537
Interest expense		(1,131	)		(980	)
Foreign currency gains, net (1)		1,557			3,103
Foreign currency contracts losses, net (2)		(1,743	)		(1,613	)
Other (expense) income		(82	)		109
Total other (expense) income, net	$	(874	)	$	1,156

(1) Our foreign currency gains, net are predominantly attributable to the re-measurement gains or losses on our net balances of monetary assets and liabilities in our foreign subsidiaries which were primarily denominated in the Euro, and to a lesser extent, the British Pound and Canadian Dollar. The foreign currency re-measurement adjustments to these balance sheet items are calculated by comparing the currency spot rates at the end of a month to the spot rates at the end of the previous month.

(2) Relates to changes in fair value of our forward foreign currency contracts not designated as hedging instruments. See Note 15 — Derivative Instruments for further details.

NOTE 11 — INCOME TAX PROVISION

During the three months ended March 31, 2012, the provision for income taxes decreased to $1.8 million from $3.2 million compared to the same period in 2011. The effective income tax rate for the three months ended March 31, 2012 and 2011 was approximately 40.6% and 48.3%, respectively. The change in the provision for income taxes and the effective income tax rate is primarily a result of the decrease in the consolidated pre-tax book income and the taxes computed based on a lower ratio of year-to-date foreign losses as compared to the overall consolidated pre-tax book income for which no benefit could be taken and partially offset by discrete items impacting the quarter ended March 31, 2012. Discrete items included an increase in the income tax provision related to the establishment of a valuation allowance against certain Luxembourg deferred tax assets.

NOTE 12 — NET INCOME PER SHARE ATTRIBUTABLE TO QUEST SOFTWARE INC. STOCKHOLDERS

Basic net income per share is computed by dividing net income attributable to Quest Software Inc. stockholders by the weighted-average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution of securities by including other common stock equivalents, including stock options and restricted stock units, in the weighted–average number of common shares outstanding for a period, if dilutive.

The table below sets forth the reconciliation of the denominator of the net income per share attributable to Quest Software, Inc. stockholders (in thousands):

	Three Months Ended March  31
	2012		2011
Shares used in computing basic net income per share		83,424		92,303
Dilutive effect of stock options and restricted stock units (1)		1,678		2,809
Shares used in computing diluted net income per share		85,102		95,112

(1) Options to purchase 4.9 million and 1.3 million shares of common stock were outstanding during the three months ended March 31, 2012 and 2011, respectively, but were not included in the computation of diluted net income per share as inclusion would have been anti-dilutive.

15

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

NOTE 13 — NONCONTROLLING INTEREST

In October 2011, we acquired a 60 percent voting equity interest in Smarsh, Inc., a privately-held company. The minority shareholder who holds the remaining 40 percent noncontrolling interest was granted the right to require us to purchase half of the 40 percent noncontrolling interest from the first anniversary until the fifth anniversary of the acquisition date. The maximum redemption value payable by us in that case would be $22 million. The put right is embedded in the shares owned by the minority shareholder and is not freestanding. This 20 percent noncontrolling interest is accounted for as redeemable noncontrolling interest because redemption is outside our control. As such, the redeemable noncontrolling interest is reported in the mezzanine section as temporary equity in our consolidated balance sheets. The remaining 20 percent noncontrolling interest is presented within total equity in our consolidated balance sheets. Noncontrolling interest that is redeemable at other than fair value is recorded at the higher of its carrying amount or redemption value as if the end of the reporting period was the redemption date. As of March 31, 2012, the carrying amount of the redeemable noncontrolling interest was increased to the redemption value of $22 million. The increase of $0.1 million during the quarter ended March 31, 2012 was recorded in net loss attributable to noncontrolling interest, thereby directly affecting net income attributable to Quest Software, Inc. Net income per share is calculated based on net income attributable to Quest Software, Inc. stockholders.

NOTE 14 — STOCK-BASED COMPENSATION

We offer stock-based awards to employees, directors and consultants under the Quest Software, Inc. 2008 Stock Incentive Plan (the “2008 Plan”). The 2008 Plan was adopted by our Board of Directors as a means to secure and retain the services of our employees, directors, and consultants, to provide such eligible individuals an opportunity to benefit from increases in the value of our Common Stock through the grant of stock awards, and thereby align the long-term compensation and interests of those individuals with our stockholders.

The 2008 Plan provides for the discretionary grant of incentive stock options, non-statutory stock options, restricted stock awards, restricted stock unit awards, stock appreciation rights, and other forms of equity compensation (collectively, the “stock awards”). The number of shares of Common Stock available for issuance under the 2008 Plan is 19.3 million as of March 31, 2012. The number of shares of Common Stock reserved for issuance under the 2008 Plan will be reduced by 1 share for each share of Common Stock issued under the 2008 Plan pursuant to a stock option and by 1.94 shares for each share of Common Stock issued under the 2008 Plan pursuant to a restricted stock award, restricted stock unit award, or other stock award. As of March 31, 2012, there were 4.8 million shares available for grant under the 2008 Plan.

Stock Option Awards

The fair value of each option award is estimated on the date of grant using a Black-Scholes option valuation model that uses the assumptions noted in the following table. The fair value of these awards is amortized on a straight-line basis over the vesting period. Expected volatilities are based on historical volatilities of Quest’s stock. We use historical data to estimate option exercise and employee termination within the valuation model; separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes. The risk-free rate is based on the U.S. Treasury zero-coupon issues in effect at the time of option grant for equivalent remaining terms. We do not expect to pay any dividends and, therefore, we use an expected dividend yield of zero.

We used the following weighted-average assumptions for option awards granted during the three months ended March 31, 2012:

	Three Months Ended March 31
	2012			2011
Expected volatility		36	%		34	%
Expected term (in years)		5.7			5.7
Risk-free interest rate		1.0	%		2.1	%
Expected dividend yield		None			None

16

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

A summary of the activity of employee stock options during the three months ended March 31, 2012, and details regarding the options outstanding and exercisable at March 31, 2012, are provided below:

	Number of Shares (in thousands)			Weighted-Average Exercise Price (per share)		Weighted-Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands) (1)
Outstanding at December 31, 2011		15,779		$	17.26
Granted		133		$	19.36
Exercised		(863	)	$	17.27
Canceled/forfeited/expired		(427	)	$	18.25
Outstanding at March 31, 2012		14,622		$	17.24		7.22	$	93,754
Vested or expected to vest at March 31, 2012		13,502		$	17.19		7.07	$	87,229
Exercisable at March 31, 2012		5,989		$	15.42		5.00	$	48,501

(1) These amounts represent the difference between the exercise price and $23.27, the closing price of Quest Software, Inc. stock on March 31, 2012 as reported on the NASDAQ National Market, for all options outstanding that have an exercise price currently below the closing price.

The weighted-average fair value of options granted during the three months ended March 31, 2012 and 2011 was $6.75 and $9.22, respectively. The total intrinsic value of options exercised was $5.1 million and $6.6 million for the three months ended March 31, 2012 and 2011, respectively. The total fair value of options vested during the three months ended March 31, 2012 and 2011 was $12.6 million and $11.3 million, respectively.

Restricted Stock Unit Awards (“RSU Awards”)

RSU awards have been granted to selected executives pursuant to our Executive Incentive Plan. We have also granted RSU awards to key employees pursuant to a Profit Sharing Plan. Our outstanding RSU awards vest over three years with vesting contingent upon continuous service and meeting certain company-wide performance goals, including sales, operating profit margin, and cash flow targets. We estimate the fair value of RSU awards using the market price of our common stock on the date of the grant. The fair value of these awards is amortized on a straight-line basis over the vesting period. Additionally, a portion of each RSU award is settled in cash, only to the extent necessary to pay the minimum tax withholding or any government levies on the restricted stock unit.

A summary of our RSU awards activity during the three months ended March 31, 2012 is provided below:

	Number of Shares			Weighted-Average Grant Date Fair Value (per share)
Nonvested at January 1, 2012		236,331		$	15.88
Granted		—		$	—
Vested		(86,524	)	$	14.66
Forfeited		(9,623	)	$	15.91
Nonvested at March 31, 2012(1)		140,184		$	16.63

(1) 132,135 of these shares are expected to vest.

The total fair value of RSU awards vested during the three months ended March 31, 2012 and 2011 was $1.3 million and $2.7 million, respectively.

17

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

Stock-Based Compensation Expense

The following table presents the income statement classification of all stock-based compensation expense for the three months ended March 31, 2012 and 2011 (in thousands):

	Three Months Ended March 31
	2012		2011
Cost of services	$	232	$	316
Sales and marketing		1,728		2,109
Research and development		1,497		2,152
General and administrative		2,628		2,836
Total stock-based compensation		6,083		7,413
Tax benefit associated with stock-based compensation expense (1)		2,385		2,869
Reduction of net income	$	3,698	$	4,544

(1) The recognized tax benefit related to stock-based compensation expense was estimated to be 39.2% and 38.7% for the quarter ended March 31, 2012 and 2011, respectively. This approximates the blended Federal and State statutory tax rate after the benefit for state taxes.

As of March 31, 2012, total unrecognized stock-based compensation cost related to unvested stock option awards was $46.9 million, which is expected to be recognized over a weighted-average period of 4.1 years and total unrecognized stock-based compensation cost related to unvested RSU awards was $2.0 million, which is expected to be recognized over a weighted-average period of 0.8 years.

NOTE 15 — DERIVATIVE INSTRUMENTS

Foreign Exchange Risk Management Policy

Our Foreign Exchange Risk Management Policy identifies target exposures such as balance sheet, cash flow and income statement risks, program objectives, approved financial instruments and counterparties, accounting and tax treatment, as well as oversight, reporting and controls. The functional currency of all our subsidiaries is the U.S. Dollar. Our exposure to foreign exchange risk originates both from the operating results of our foreign operations denominated in currencies other than the U.S. Dollar, as well as our net balances of monetary assets and liabilities within our foreign subsidiaries. These exposures have the potential to produce either gains or losses depending on the directional movement of the foreign currencies versus the U.S. Dollar and our operational profile in foreign subsidiaries. Certain balance sheet items are re-measured each period and the changes in value are recorded within Other (expense) income, net.

We utilize a balance sheet hedging program with the stated objective of reducing volatility within Other (expense) income, net. Under this program, we use derivatives in the form of foreign currency contracts to hedge certain balance sheet exposures. We do not designate these contracts as hedging instruments and therefore do not qualify for hedge accounting. Accordingly, these outstanding non-designated derivatives are recognized in the consolidated balance sheets at fair value and the changes in fair value from these contracts are recorded in Other (expense) income, net, in the consolidated income statements. These derivative contracts typically have a one month term.

We have a cash flow hedging program primarily focused on reducing volatility in our forecasted research and development cash expenses and license revenues, some of which are denominated in non-U.S. Dollar currencies. Under this program, we use derivatives in the form of forward foreign currency contracts and foreign currency option contracts to hedge certain forecasted transactions. These derivatives, with durations ranging from less than one month to nine months, are designated as hedging instruments and qualify for hedge accounting. Accordingly, these outstanding designated derivatives are recognized in the consolidated balance sheets at fair value. Changes in value that are highly effective are recognized in Accumulated other comprehensive income (“AOCI”) in the consolidated balance sheets, until the hedged item is recognized in the income statement. Any ineffective portion of a derivative’s change in fair value is recorded in Other (expense) income, net, in the consolidated income statements. There was no material ineffectiveness in our cash flow hedging program for the three months ended March 31, 2012.

18

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

We had the following notional amounts for our foreign currency contracts included in our consolidated balance sheets (in U.S. Dollars in thousands):

Currency	March 31 2012		December 31 2011
Derivatives designated as hedging instruments
Australian Dollar	$	2,642	$	4,078
Canadian Dollar		8,415		14,158
Chinese Yuan		1,747		2,777
Israeli Shekel		2,370		3,773
Russian Ruble		5,012		8,433
Euro		3,194		—
Total	$	23,380	$	33,219
Derivatives not designated as hedging instruments
Danish Krone	$	1,255	$	891
Norwegian Krone		1,774		1,073
Swedish Krona		1,359		446
Euro		33,303		40,397
Australian Dollar		8,539		8,138
South Korean Won		2,217		2,193
Brazil Real		3,988		3,826
Japanese Yen		3,689		6,439
British Pound		6,355		7,950
Total	$	62,479	$	71,353

Fair Value of Derivative Instruments

The following table provides the fair value of our foreign currency contracts included in our consolidated balance sheets (in thousands):

Derivative Assets

Derivative Liabilities

March 31, 2012

December 31, 2011

March 31, 2012

December 31, 2011

Derivatives designated as hedging instruments

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Foreign currency contracts

Prepaid expenses and other current assets

$

914

Prepaid expenses and other current assets

$

351

Other accrued expenses

$

168

Other accrued expenses

$

237

Derivative Assets

Derivative Liabilities

March 31, 2012

December 31, 2011

March 31, 2012

December 31, 2011

Derivatives not designated as hedging instruments

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Foreign currency contracts

Prepaid expenses and other current assets

$

478

Prepaid expenses and other current assets

$

2,512

Other accrued expenses

$

68

Other accrued expenses

$

63

(1) Please refer to Note 16 – Fair Value Measurements for additional details.

19

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

The Effect of Derivative Instruments on Financial Performance

The following tables provide the effect that derivative instruments had on our AOCI and results of operations (in thousands):

	Three Months Ended March 31
Derivatives designated as hedging instruments	Amount of gain (loss) recognized in AOCI (effective  portion)					Location of (loss) gain reclassified from accumulated AOCI into income statement (effective portion)	Amount of (loss) gain reclassified from accumulated AOCI (effective portion)
	2012		2011				2012			2011
Foreign currency contracts	$	709	$	(407	)	Revenues	$	(118	)	$	(1,030	)
						Operating expenses	$	340		$	500

	Three Months Ended March 31
Derivatives not designated as hedging instruments	Location of gain (loss) recognized on derivative instruments		Amount of gain (loss) recognized on derivative instruments
			2012			2011
Foreign currency contracts		Other (expense) income, net	$	(1,743	)	$	(1,613	)

NOTE 16 — FAIR VALUE MEASUREMENTS

We perform fair value measurements in accordance with FASB’s guidance on Fair Value Measurements and Disclosures. This standard defines fair value, provides guidance for measuring fair value and requires certain disclosures. This standard does not require any new fair value measurements, but rather applies under other accounting pronouncements that require or permit fair value measurements. The standard discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost). The statement establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels:

• Level 1: Observable inputs such as quoted prices (unadjusted) in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.

• Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.

• Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions when there is little or no market data.

We measure our financial assets and liabilities at fair value on a recurring basis using the following valuation techniques:

(a) Market Approach – uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

(b) Income Approach – uses valuation techniques to convert future estimated cash flows to a single present amount based on current market expectations about those future amounts, using present value techniques.

20

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

The following table represents our fair value hierarchy and the valuation techniques used for financial assets and financial liabilities measured at fair value on a recurring basis (in thousands):

	March 31, 2012
	Total		Level 1		Level 2		Level 3		Valuation Techniques
Assets:
Money market funds	$	104,249	$	104,249	$	—	$	—		(a	)
U.S. treasury securities		9,496		9,496		—		—		(a	)
U.S. agency securities		3,532		3,532		—		—		(a	)
Corporate notes/bonds		47,612		—		47,612		—		(a	)
Certificates/term deposits		3,042		—		3,042		—		(a	)
Derivative assets (1)		1,392		—		1,392		—		(a	)
Total	$	169,323	$	117,277	$	52,046	$	—
Liabilities:
Derivative liabilities (1)	$	236	$	—	$	236	$	—		(a	)
Contingent consideration		2,755		—		—		2,755		(b	)
Total	$	2,991	$	—	$	236	$	2,755

	December 31, 2011
	Total		Level 1		Level 2		Level 3		Valuation Techniques
Assets:
Money market funds	$	65,811	$	65,811	$	—	$	—		(a	)
U.S. treasury securities		6,921		3,499		3,422		—		(a	)
U.S. agency securities		5,551		3,545		2,006		—		(a	)
Corporate notes/bonds		47,528		—		47,528		—		(a	)
Certificates/term deposits		2,922		—		2,922		—		(a	)
Derivative assets (1)		2,863		—		2,863		—		(a	)
Total	$	131,596	$	72,855	$	58,741	$	—
Liabilities:
Derivative liabilities (1)	$	300	$	—	$	300	$	—		(a	)
Contingent consideration		3,782		—		—		3,782		(b	)
Total	$	4,082	$	—	$	300	$	3,782

(1) See Note 15 – Derivative Instruments for details.

We classify our investments in U.S. Treasury and U.S. Agency securities using a market approach based on the quoted market prices of identical or similar instruments. A determination of the fair value classification of U.S. Treasury and U.S. Agency securities will be made on a case by case basis based on recent buy or sell activity. As of March 31, 2012, the fair values of our U.S. Treasury and U.S. Agency securities are based on unadjusted market prices in active markets and are classified as Level 1 of the fair value hierarchy.

We determine the amount of transfers between Levels 1 and 2 or transfers into or out of Level 3 by using the end-of-period fair value. We had no transfers among the fair value hierarchy during the three months ended March 31, 2012.

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QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

The following table presents our liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2012 and 2011 (in thousands):

	Three Months Ended March 31
	2012			2011
Total, beginning of the period	$	3,782		$	8,515
Contingent consideration		—			3,300
Change in fair value of contingent consideration		(27	)		—
Payment of contingent consideration		(1,000	)		(2,088	)
Total, end of the period	$	2,755		$	9,727

We enter into earn-out agreements with the shareholders of certain companies we acquire. The earn-out contingent payments are typically determined based on achieving certain sales or revenue targets over a specified period after the acquisition date. This also includes contingent consideration relating to our purchase of intellectual property whereby the former owner has the opportunity to earn an additional amount contingent upon achievement of certain technology milestones. The fair value of the contingent consideration was determined using the income approach based on our expectations of achieving the sales and revenue targets and technology milestones which are significant inputs that are not observable in the market and thus represents Level 3 inputs under the fair value hierarchy. A key assumption used in determining the contingent payment obligation for those earn out contingencies tied to sales or revenue targets is a discount rate consistent with our estimated pre-tax cost of debt. We do not expect that a change in the discount rate will result in a significantly higher or lower fair value measurement.

Other Financial Assets and Liabilities

The carrying amounts of our other financial assets and liabilities including accounts receivable, accounts payable and accrued liabilities approximate their respective fair values because of the relatively short period of time between their origination and their expected realization.

The book value and fair value of our current and long-term portion of loans payable as of March 31, 2012 are as follows (in thousands):

	Book Value		Fair Value (1)
Current portion of loans payable	$	71,614	$	71,614
Long-term portion of loans payable		32,528		32,528
	$	104,142	$	104,142

(1) Estimated fair value of long-term debt is measured using the income approach. This fair value measurement is based on similar grade US Treasury security re-priced at March 31, 2012 plus contractual spread and thus represents Level 2 inputs under the fair value hierarchy.

NOTE 17 — COMMITMENTS AND CONTINGENCIES

Patent Litigation. On August 27, 2010, we filed a complaint in the United States District Court for the District of Utah against Centrify Corporation and Likewise Software alleging that Centrify’s DirectControl software and Likewise’s Enterprise software infringe Quest’s United States Patent No. 7,617,501 (the “‘501 Patent”). Our complaint seeks money damages, costs, attorneys’ fees, and the entry of permanent injunctions against each defendant. On December 27, 2011, pursuant to an agreement between the parties, the Court issued an order staying the lawsuit until ninety days after the earlier of (a) the conclusion of all reexamination-related appeals by the Board of Patent Appeals and Interferences pertaining to the ‘501 Patent and the ‘005 Patent; (b) if appeals to the Board of Patent Appeals and Interferences are taken in one, but not both of the reexamination proceedings pertaining to the ‘501 Patent and the ‘005 Patent, the decision of all reexamination-related appeals by the Board of Patent Appeals and Interferences in the appealed case; or (c) the deadline for the parties to file appeals to the Board of Patent Appeals and Interferences passes in the reexamination proceedings pertaining to both the ‘501 Patent and the ‘005 Patent without an appeal being timely filed in either proceeding.

22

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

On August 30, 2010, Centrify filed a complaint in the United States District Court for the Northern District of California against Quest alleging that our Authentication Services software infringes Centrify’s United States Patent No. 7,591,005 (the “‘005 Patent”). Centrify’s complaint seeks an unspecified amount of money damages, costs, attorneys’ fees, and a permanent injunction. On September 20, 2011, Centrify filed an additional complaint in the United States District Court for the Northern District of California against Quest alleging that our Authentication Services software infringes United States Patent No. 8,024,360 (the “‘360 Patent”). Centrify’s complaint seeks an unspecified amount of money damages, costs, attorneys’ fees, and a permanent injunction. On December 23, 2011, pursuant to an agreement between the parties, the Court issued an order staying both Centrify’s infringement action concerning the ‘005 Patent and Centrify’s infringement action concerning the ‘360 Patent until ninety days after the earlier of (a) the conclusion of all reexamination-related appeals by the Board of Patent Appeals and Interferences pertaining to the ‘501 Patent and the ‘005 Patent; (b) if appeals to the Board of Patent Appeals and Interferences are taken in one, but not both of the reexamination proceedings pertaining to the ‘501 Patent and the ‘005 Patent, the decision of all reexamination-related appeals by the Board of Patent Appeals and Interferences in the appealed case; or (c) the deadline for the parties to file appeals to the Board of Patent Appeals and Interferences passes in the reexamination proceedings pertaining to both the ‘501 Patent and the ‘005 Patent without an appeal being timely filed in either proceeding.

On August 31, 2010, we filed a petition with the United States Patent and Trademark Office alleging that Centrify’s ‘005 Patent is invalid and requesting the United States Patent and Trademark Office to commence an inter partes reexamination of the patentability of Centrify’s ‘005 Patent. On November 15, 2010, the United States Patent and Trademark Office granted our petition for inter partes reexamination of the patentability of Centrify’s ‘005 Patent and issued a first office action rejecting all claims of Centrify’s ‘005 Patent. On January 18, 2011, Centrify filed a response to the United States Patent and Trademark Office’s first office action. On October 19, 2011, the United States Patent and Trademark Office issued an Action Closing Prosecution, rejecting all claims of Centrify’s ‘005 Patent. On November 21, 2011, Centrify filed comments after the Action Closing Prosecution. On December 20, 2011, Quest filed a response to Centrify’s comments. On January 24, 2012, the United States Patent and Trademark Office issued a Right of Appeal Notice. On April 17, 2012, Centrify filed its appeal brief.

On September 30, 2010, Centrify filed a petition with the United States Patent and Trademark Office alleging that our ‘501 Patent is invalid and requesting the United States Patent and Trademark Office to commence an inter partes reexamination of the patentability of our ‘501 Patent. On November 30, 2010, the United States Patent and Trademark Office granted Centrify’s petition for inter partes reexamination of the patentability of our ‘501 Patent. On January 21, 2011, the United States Patent and Trademark Office issued a first office action rejecting all claims of our ‘501 Patent. Our response to the United States Patent and Trademark Office was filed on March 21, 2011. On October 20, 2011, the United States Patent and Trademark Office issued an Action Closing Prosecution, rejecting all claims of our ‘501 patent. On December 16, 2011, the United States Patent and Trademark Office issued a Right of Appeal Notice. On January 16, 2012 we filed a Notice of Appeal. On March 15, 2012, we filed our appeal brief. We believe that our ‘501 patent is valid and enforceable and intend to vigorously defend the patentability of the ‘501 Patent.

On May 2, 2011, Quest and Likewise agreed to the terms of a Settlement Agreement under which Quest agreed to dismiss the lawsuit against Likewise in exchange for a permanent injunction preventing Likewise (and its subsidiaries, affiliates, successors and assigns) from making, using, selling, offering to sell, importing, exporting, or supporting products or services that constitute technology covered by Quest’s ‘501 patent or that utilize or embody the method covered by Quest’s ‘501 patent. On May 23, 2011, the Utah Court entered the mutually agreed upon permanent injunction against Likewise, ending the case against Likewise.

Merger Litigation. Following the March 9, 2012 announcement that the Company had entered into the Merger Agreement, purported stockholder class actions were filed in the Superior Court of California, County of Orange (the “California Actions”) and the Court of Chancery of the State of Delaware (the “Delaware Actions”). In each case, the plaintiff alleges that members of our Board of Directors breached their fiduciary duties to Quest’s stockholders in connection with the proposed Merger and that Quest and the Insight Entities aided and abetted the directors’ breaches of fiduciary duties. The complaints claim that the proposed Merger involves an unfair price, an inadequate sales process, and unreasonable deal protection devices. Following the April 12, 2012 filing of a preliminary proxy statement on Schedule 14A (the “Proxy Statement”) related to the proposed Merger, certain plaintiffs added claims that the Company’s disclosures regarding the proposed Merger in the Proxy Statement were inadequate.

23

QUEST SOFTWARE, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)—(Continued)

In the Delaware Actions, on April 2, April 12, April 17, and April 19, 2012, plaintiffs moved for expedited proceedings and filed competing motions to consolidate the Delaware Actions and for appointment of lead counsel. Defendants opposed expedited proceedings as premature, but did not take a position with regard to the competing motions for consolidation and appointment of lead counsel. On April 25, 2012, the Chancery Court consolidated the Delaware Actions into a single action captioned, In re Quest Software, Inc. Shareholders Litigation, Consol. C.A. No. 7357-VCG, but declined to grant expedited discovery. A further status conference occurred on May 9, 2012.

In the California Actions, on April 2 and April 18, 2012, respectively, plaintiffs filed a motion for consolidation and appointment of co-lead counsel and a motion for limited expedited discovery. On April 20, 2012, Defendants filed a motion to stay the California Actions in favor of the Delaware Actions. Defendants did not oppose plaintiffs’ motion for consolidation, and on May 3, 2012, the Court consolidated the California Actions into a single action captioned In re Quest Software, Inc. Shareholder Litigation, Lead Case No. 30-2012-00552957-CU-BT-CXC. Defendants’ motion to stay and Plaintiffs’ motion for limited expedited discovery are scheduled for hearings on May 17 and May 24, 2012, respectively.

Although we cannot know or predict with certainty the outcome of any claim or proceeding or the effect such outcomes may have on us, we believe that any liability resulting from the resolution of any of these matters, individually, or in the aggregate, to the extent not otherwise provided for or covered by insurance, will not have a material adverse effect on our financial position, results of operations or liquidity.

General. The Company and its subsidiaries are also involved in other legal proceedings, claims and litigation arising in the ordinary course of business. The foregoing discussion includes material developments that occurred during the quarter ended March 31, 2012 or thereafter in our material legal proceedings.

Redeemable Noncontrolling Interest. In connection with our acquisition of a 60 percent voting equity interest in Smarsh, Inc. in October 2011, the minority shareholder who holds the remaining 40 percent noncontrolling interest was granted the right to require us to purchase half of the 40 percent noncontrolling interest from the first anniversary until the fifth anniversary of the acquisition date. The maximum redemption value payable by us in that case would be $22 million. This 20 percent noncontrolling interest is accounted for as redeemable noncontrolling interest because redemption is outside our control. As such, the redeemable noncontrolling interest is reported in the mezzanine section in our consolidated balance sheets as temporary equity. As of March 31, 2012, the carrying amount of the redeemable noncontrolling interest was increased to the redemption value of $22 million.

Construction of Building. We entered into development agreement for facilities to house our Business Operations and Advanced Technology Center in Cork, Ireland. As of March 31, 2012, we incurred $5.2 million for the land and $10.5 million for the construction of the building. Under the development agreement, we expect to incur approximately $14 million of capital expenditures to complete the construction of the building.

In the normal course of our business, we enter into certain types of agreements that require us to indemnify or guarantee the obligations of other parties. These commitments include (i) intellectual property indemnities to licensees of our software products, (ii) indemnities to certain lessors under office space leases for certain claims arising from our use or occupancy of the related premises, or for the obligations of our subsidiaries under leasing arrangements, (iii) indemnities to customers, vendors and service providers for claims based on negligence or willful misconduct of our employees and agents, (iv) indemnities to our directors and officers to the maximum extent permitted under applicable law, and (v) letters of credit and similar obligations as a form of credit support for our international subsidiaries and certain resellers. The terms and duration of these commitments varies and, in some cases, may be indefinite, and certain of these commitments do not limit the maximum amount of future payments we could become obligated to make there under; accordingly, our actual aggregate maximum exposure related to these types of commitments cannot be reasonably estimated. Historically, we have not been obligated to make significant payments for obligations of this nature, and no liabilities have been recorded for these obligations in our financial statements included in this report.

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

The following discussion of our financial condition and results of operations (“MD&A”) should be read in conjunction with the condensed consolidated financial statements and notes to those statements included elsewhere in this Report. Certain statements in this Report, including statements regarding our business strategies, operations, financial condition and prospects are forward-looking statements. Use of the words “believe,” “expect,” “anticipate,” “will,” “contemplate,” “would,” “project,” “plan,” “may,” “could,” “intend,” “likely,” “might,” “estimate,” “continue” and similar expressions that contemplate future events may identify forward-looking statements.

Numerous important factors, risks and uncertainties affect our operations and could cause actual results to differ materially from those expressed or implied by these or any other forward-looking statements made by us or on our behalf. Readers are urged to carefully review and consider the various disclosures made in this Report, including those described under Part I, Item 1A, Risk Factors, of our Annual Report on Form 10-K for the year ended December 31, 2011, under Part II, Item 1A, Risk Factors of this Report, and in other filings with the SEC that attempt to advise interested parties of certain risks and factors that may affect our business, which are available on the SEC’s website at www.sec.gov. Readers are cautioned not to place undue reliance on these forward-looking statements, which are based on current expectations and reflect management’s opinions only as of the date thereof. We do not assume any obligation to revise or update forward-looking statements. Finally, our historic results should not be viewed as indicative of future performance.

We have trademarks and registered trademarks in the United States and other countries, including Quest, Quest Software, the Quest Software logo, Simplicity at Work, AccessManager, Active Administrator, ActiveDL, ActiveEntry, ActiveGroups, ActiveRoles, Akonix, Asempra, BakBone, Benchmark Factory, Big Brother, Box & Wave design, BridgeAccess, BridgeAutoEscalate, BridgeSearch, BridgeTrak, ChangeAuditor, ChangeBase, Data Replicator, DataFactory, Defender, DeployDirector, Desktop Authority, Directory Analyzer, Directory Script, DS Analyzer, DS Expert, DS Proxy, Enterprise Security Explorer, ERDisk, FastLane, File System Auditor, FlashRestore, Foglight, GPOADmin, Help Desk Authority, I/Watch, InLook, InstantAssist, IntelliProfile, InTrust, iToken, JClass, JProbe, Kemma Software, KL Group and Design, Knowledge Xpert, Linked Structures design, LiteSpeed, LiveReorg, LogADmin, Mail Center, MessageStats, MultSess, NBSpool, NetBase, NetPro, NetVault, NetVault FastRecover, NetVault: TotalOps, NetVault SmartDisk; PacketTrap, PassGo, Patch Authority, PerformaSure, Point, Click, Done!, PowerGUI, Privilege Authority, QDesigner and design, Quest Central, Quest Distributed Monkey Engine, Quest vWorkspace Ready and design, RemoteScan, ReportADmin, RestoreADmin, ScriptLogic, Secure Copy, SecureWithin, Security Explorer, Security Lifecycle Map, SelectDL, SelfServiceADmin, SharePlex, Sitraka, Sitraka and droplet design, Spotlight, SQL Navigator, SQL Turbo, SQL Watch, SQLab Xpert, Stat, StealthCollect, Symlabs, Tag and Follow, TimeTrace, Toad, Toad (logo), T.O.A.D., Toad World, VaultDR, vConverter, vEcoShell, vFoglight, Vintela, Vizioncore, vKernel, Volcker Informatik AG, vRanger, vSpotlight, vToad, vWorkspace, WebDefender, Webthority, and XRT. Other trademarks and registered trademarks are the property of their respective owners.

Overview

Our Company and Business Model

Quest Software, Inc. delivers simple-to-use IT management software that saves time and money across physical, virtual, and cloud environments. In each of our solution families –Database Management, Performance Monitoring, Data Protection, User Workspace Management, Windows Server Management, and Identity and Access Management – we concentrate on developing practical, innovative solutions to make IT tasks easier and less costly for our customers, who number more than 100,000 around the world. Our products are designed to simplify even the most complex IT tasks.

Pending Proposed Merger Transaction

On March 8, 2012, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Expedition Holding Company, Inc., a Delaware corporation (“Parent”), and Expedition Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent, pursuant to which Parent will acquire, subject to certain exceptions, all of the outstanding shares of the Company’s common stock for a purchase price of $23.00 per share in cash. Parent and Merger Sub are beneficially owned by funds affiliated with Insight Venture Management, LLC, a Delaware limited liability company (“Insight”).

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For terms of the Merger Agreement, including circumstances under which the Merger Agreement can be terminated and the ramifications of such a termination, as well as other terms and conditions, refer to the Merger Agreement filed as Exhibit 2.1 to our Current Report on Form 8-K with the Securities and Exchange Commission on March 9, 2012.

The Company’s Board of Directors, acting upon the unanimous recommendation of a special committee of the Board of Directors comprised solely of independent and disinterested directors (the “Special Committee”), approved and adopted the Merger Agreement and has recommended that the Company’s stockholders vote to approve the Merger Agreement. The Special Committee negotiated the terms of the Merger Agreement with the assistance of legal and financial advisors to the Special Committee.

The merger is currently expected to close in the third quarter of this year, and is subject to customary closing conditions as well as approval and adoption of the Merger Agreement by the Company’s stockholders (including approval by a majority of the outstanding unaffiliated shares of common stock, which excludes any shares of common stock held by Parent, Merger Sub and Vincent Smith, President, Chief Executive Officer and Chairman of the Board, and certain related trusts). If completed, the merger will result in the Company becoming a privately-held company, and its shares of common stock will no longer be listed on any public market. No assurance can be given that the merger will be completed.

On April 12, 2012, the Company filed a Preliminary Proxy Statement (“Preliminary Merger Proxy”) together with a Schedule 13E-3 with the Securities Exchange Commission (“SEC”) indicating its intention to call a special meeting of its stockholders at a still to be specified date to vote on the Merger Agreement for the Company to go private.

Quarterly Update

As discussed in more detail throughout our MD&A, for the three months ended March 31, 2012 compared to the three months ended March 31, 2011, we delivered the following financial performance:

• Total revenues increased by $24.0 million, or 12.8%, to $212.2 million.

• Total expenses increased by $24.1 million, or 13.2%, to $206.9 million.

• Income from operations decreased by $0.1 million, or 2.1%, to $5.3 million.

• Diluted earnings per share decreased by $0.01, or 25%, to $0.03.

The comparison of our operating results in the first quarter of 2012 against the same period in 2011 is impacted by our acquisitions. We have acquired seven private companies after the first quarter of 2011. In our discussion of changes in our results of operations, we quantify the contribution of these acquisitions.

For the first quarter of 2012 total revenues increased by 12.8% compared to the same period in 2011. Our Americas sales region, which includes United States, Canada and Latin America, contributed 61.3% of total revenues, and the rest of the world, comprised of our Asia Pacific (“APAC”) sales region and our Europe, Middle East and Africa (“EMEA”) sales region, contributed 38.7% of total revenues, as compared to 62.3% and 37.7%, respectively, in the same period last year. All of our sales regions performed well during this quarter.

The increase in our total revenues was primarily due to increased sales of our Windows Server Management and Data Protection products and related services across all sales regions. The strength in our Windows Migration products was due to our customers’ migration to Exchange Server 2010 and Sharepoint 2010. Our acquisitions contributed $10.2 million, or 42.5%, of the overall increase in total revenues compared to the same period in 2011. Total revenues were negatively impacted by the stronger U.S. Dollar relative to certain non-U.S. Dollar currencies. This resulted in lower U.S. dollar equivalent sales for several currencies. Since certain of our international sales are denominated in these non-U.S. Dollar currencies, the negative impact from foreign currency was $0.3 million when comparing average monthly 2012 rates to 2011.

Total expenses increased compared to the same period in 2011. Our expenses primarily consist of personnel costs, which include compensation, benefits and payroll related taxes and are a function of our worldwide headcount. Our average full-time employee headcount for the first quarter of 2012 was 3,828 as compared to 3,681 for the first quarter of 2011. Our average full-time employee headcount in locations outside of the United States was 1,921 for the first quarter of 2012 compared to 1,741 for the first quarter of 2011. The increase in our headcount compared to the first quarter of 2011 was primarily due to our acquisitions after the first quarter of 2011. These acquisitions contributed $19.9 million, or 82.4%, of the overall increase in total expenses relating to their operating costs. Our total expenses were positively impacted by the stronger U.S. Dollar relative to certain non-U.S. Dollar currencies in the first quarter of 2012, which resulted in lower U.S. Dollar equivalents for several currencies. Since certain of our international expenses are denominated in these non-U.S. Dollar currencies, our total expenses in the first quarter of 2012 decreased by approximately $0.8 million compared to the same period in 2011 as a result of the impact of foreign currency exchange rates.

26

Foreign Currency

While we are a U.S. Dollar functional company on a world-wide basis, we transact business and operate using multiple foreign currencies. As such, the value of our revenues, expenses, certain account balances and cash flows are exposed to fluctuations in foreign currencies against the value of the U.S. Dollar. For example, when the U.S. Dollar strengthens against several non-U.S. Dollar currencies, our foreign revenues and thus our total revenues can be negatively impacted. A stronger U.S. Dollar translates into lower expenses in those entities where we have operations and our personnel and occupancy expenses are denominated in non-U.S. Dollars, resulting in lower total expenses. Conversely, a weaker U.S. Dollar would have the opposite effects on total revenues and expenses. In certain geographic regions and within specific currencies, partial offsets between revenues and expenses or balance sheet positions may reduce this exposure. In other instances, we can manage our operations to reduce foreign currency exposure or utilize derivative instruments to manage this exposure. See Note 15 – Derivative Instruments of our Notes to Condensed Consolidated Financial Statements for additional details.

Results of Operations

The following are as a percentage of total revenues:

	Three Months Ended March 31
	2012			2011
Revenues:
Licenses		33.0	%		35.5	%
Maintenance Services		59.8			57.4
Professional Services		7.2			7.1
Total revenues		100.0			100.0
Cost of revenues:
Licenses		1.4			1.0
Maintenance Services		5.6			5.3
Professional Services		5.7			5.8
Amortization of purchased technology		3.3			2.5
Total cost of revenues		16.0			14.6
Gross profit		84.0			85.4
Operating expenses:
Sales and marketing		40.4			43.4
Research and development		21.9			22.2
General and administrative		15.3			15.0
Amortization of other purchased intangible assets		3.9			2.0
Total operating expenses		81.5			82.6
Income from operations		2.5			2.8
Other (expense) income, net		(0.5	)		0.7
Income before income tax provision		2.0			3.5
Income tax provision		0.8			1.7
Net income		1.2			1.8
Net loss attributable to noncontrolling interest		0.1			—
Net income attributable to Quest Software, Inc.		1.3	%		1.8	%

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Comparison of Three Months Ended March 31, 2012 and 2011

Revenues

Total revenues and year-over-year changes are as follows (in thousands, except for percentages):

	2012		2011		Increase/(Decrease)
					Dollars		Percentage
Revenues:
Licenses
Americas	$	38,814	$	37,098	$	1,716		4.6	%
Rest of World		31,169		29,637		1,532		5.2	%
Total licenses		69,983		66,735		3,248		4.9	%
Maintenance services
Americas		82,112		70,973		11,139		15.7	%
Rest of World		44,708		37,093		7,615		20.5	%
Total maintenance services		126,820		108,066		18,754		17.4	%
Professional services
Americas		9,194		9,093		101		1.1	%
Rest of World		6,199		4,263		1,936		45.4	%
Total professional services		15,393		13,356		2,037		15.3	%
Total revenues	$	212,196	$	188,157	$	24,039		12.8	%

Our revenues for the three months ended March 31, 2012 are comprised of 33.0% of license revenues, 59.8% of maintenance services revenues and 7.2% of professional services revenues compared to 35.5% of license revenues, 57.4% of maintenance services revenues and 7.1% of professional services revenues in the first quarter of 2011.

Licenses Revenues —We generate revenues by licensing our software products, principally on a perpetual basis. In addition to perpetual software licenses, we sell time-based software licenses (or term licenses) wherein customers pay a single fee for the right to use the software and receive maintenance for a defined period of time. Our acquisitions contributed $2.2 million of the overall increase in license revenues for the three months ended March 31, 2012.

Maintenance Services Revenues — Maintenance services revenues are derived from post-contract technical support services (“maintenance”). Maintenance revenues are generated from support and maintenance services relating to current year sales of new software products and from the renewal of existing maintenance agreements for software licenses sold in prior periods. The increase in maintenance services revenues for the three months ended March 31, 2012 compared to the same period last year was primarily due to Windows Server Management and Data Protection related maintenance services across all sales regions. Our acquisitions, including Smarsh, contributed $7.9 million of the overall increase in maintenance services revenues for the three months ended March 31, 2012, respectively.

Maintenance services revenues continue to contribute a larger percentage of our total revenues. This is primarily due to our growing installed base of customers and because maintenance contract growth exceeds that of license contracts from time to time. The core customer base is also further augmented from acquired companies. Thus, as our maintenance customer base grows, maintenance renewals have a larger influence on the maintenance revenue growth rate and the amount of new software license revenues has a diminishing effect. Therefore, the growth rate of total revenues does not necessarily correlate directly to the growth rate of new software license revenues in a given period. The primary determinant of changes in our maintenance revenue profile is the extent to which our customers renew their annual maintenance agreements, taking into account the number of products and licenses for which each customer renews, and the timing of the renewals by each such customer. If our maintenance renewals were to decline materially, our maintenance revenues, total revenues and cash flows would likely decline materially as well.

Professional Services Revenues — Professional services revenues are derived from consulting and training services. The increase in professional services revenues for the three months ended March 31, 2012 compared to the same period last year was primarily due to Windows Server Management related services particularly in EMEA sales region.

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Cost of Revenues

Total cost of revenues and year-over-year changes are as follows (in thousands, except for percentages):

	2012		2011		Increase (Decrease)
					Dollars		Percentage
Cost of Revenues:
Licenses	$	2,883	$	1,784	$	1,099		61.6	%
Maintenance services		11,820		10,011		1,809		18.1	%
Professional services		12,182		10,954		1,228		11.2	%
Amortization of purchased technology		6,968		4,650		2,318		49.8	%
Total cost of revenues	$	33,853	$	27,399	$	6,454		23.6	%

Cost of Licenses — Cost of licenses primarily consists of third-party software royalties, product packaging, delivery, and personnel costs. Cost of licenses as a percentage of license revenues was 4.1% and 2.7% for the three months ended March 31, 2012 and 2011, respectively.

Cost of Maintenance Services — Cost of maintenance services primarily consists of personnel, outside consultants, facilities and systems costs used in providing maintenance services. Cost of maintenance services does not include development costs related to bug fixes and upgrades which are classified in research and development and which are not separately determinable. Cost of maintenance services as a percentage of maintenance services revenues remained flat at 9.3% for the three months ended March 31, 2012 and 2011, respectively.

Cost of Professional Services — Cost of professional services primarily consists of personnel, outside consultants, facilities and systems costs used in providing consulting and training services. Cost of professional services as a percentage of professional services revenues was 79.1% and 82.0% for the three months ended March 31, 2012 and 2011, respectively.

Amortization of Purchased Technology — Amortization of purchased technology includes amortization of the fair value of purchased technology associated with acquisitions. The increase for the three months ended March 31, 2012 compared to the same period last year was due to acquisitions completed after the first quarter of 2011.

Operating Expenses

Year-over-year changes in the principal components of our operating expenses are as follows (in thousands, except for percentages):

	2012		2011		Increase/(Decrease)
					Dollars		Percentage
Operating Expenses:
Sales and marketing	$	85,962	$	81,729	$	4,233		5.2	%
Research and development		46,375		41,723		4,652		11.1	%
General and administrative		32,462		28,193		4,269		15.1	%
Amortization of other purchased intangible assets		8,291		3,747		4,544		121.3	%
Total operating expenses	$	173,090	$	155,392	$	17,698		11.4	%

Sales and Marketing — Sales and marketing expenses consist primarily of compensation and benefit costs for sales and marketing personnel, sales commissions, and costs of trade shows, travel and entertainment and various discretionary marketing programs. Sales and marketing expenses as a percentage of total revenues for the first quarter of 2012 were 40.5% compared to 43.4% in the first quarter of 2011. Sales and marketing expenses increased during the three months ended March 31, 2012 primarily due to an increase of $3.7 million in personnel-related costs. Our average full-time sales and marketing employee headcount for the first quarter of 2012 was 1,584 compared to 1,514 in the first quarter of 2011. Our acquisitions contributed $5.2 million of the overall increase in sales and marketing expenses during the three months ended March 31, 2012 compared to the same period in 2011.

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Research and Development — Research and development expenses consist primarily of compensation and benefit costs for software developers who develop new products, fix bugs and design upgrades to existing products and at times provide engineering support for maintenance services, software product managers, quality assurance and technical documentation personnel, and payments made to outside software development consultants in connection with our ongoing efforts to enhance our core technologies and develop additional products. Research and development expenses as a percentage of total revenues were 21.9% and 22.2% for the three months ended March 31, 2012 and 2011, respectively. Research and development expenses increased during the three months ended March 31, 2012 due to an increase of approximately $4.9 million in personnel-related costs. Our average full time research and development employee headcount for the three months ended March 31, 2012 increased by 16 compared to the same period in 2011. Our acquisitions contributed $4.9 million of the overall increase in research and development expenses during the three months ended March 31, 2012 compared to the same period in 2011.

General and Administrative — General and administrative expenses consist primarily of compensation and benefit costs for our executive, finance, legal, human resources, administrative and information services personnel, and professional fees for audit, tax and legal services. General and administrative expenses as a percentage of total revenues were 15.3% and 15.0% for the three months ended March 31, 2012 and 2011, respectively. General and administrative expenses increased during the three months ended March 31, 2012 primarily due to costs related to the “go private” and proposed merger transaction. Our acquisitions contributed $1.1 million of the overall increase in general and administrative expenses during the three months ended March 31, 2012 compared to the same period in 2011.

Amortization of Other Purchased Intangible Assets — Amortization of other purchased intangible assets includes the amortization of customer lists, trademarks and trade names, non-compete agreements and maintenance contracts associated with acquisitions. The increase for the three months ended March 31, 2012 compared to the same period last year was due to acquisitions completed after the first quarter of 2011.

Other (Expense) Income, Net

Other (expense) income, net consists of the following (in thousands):

							Increase/(Decrease)
	2012			2011			Dollars			Percentage
Interest income	$	525		$	537		$	(12	)		(2.2	)%
Interest expense		(1,131	)		(980	)		(151	)		15.4	%
Foreign currency gains, net		1,557			3,103			(1,546	)		(49.8	)%
Foreign currency contracts losses, net		(1,743	)		(1,613	)		(130	)		8.1	%
Other (expense) income		(82	)		109			(191	)		N/M
Total other (expense) income, net	$	(874	)	$	1,156		$	(2,030	)		N/M

Other (expense) income, net includes gains and losses from foreign exchange fluctuations, interest expense on our borrowings and gains or losses on other financial assets as well as a variety of other non-operating expenses. Our foreign currency gains or losses are predominantly attributable to re-measurement gains or losses relative to the U.S. Dollar on the re-measurement of monetary assets and liabilities, which were primarily denominated in the Euro, and to a lesser extent, the British Pound and Canadian Dollar. The largest impact to other (expense) income, net this quarter was attributed to foreign currency gains of $1.5 million compared to the same period in 2011. Our forward foreign currency contracts losses, net relate to the changes in fair value of our forward foreign currency contracts not designated as hedging instruments. Interest expense was $1.1 million and $1.0 million in the three months ended March 31, 2012 and 2011, respectively. Refer to Note 9 – Loans Payable of our Notes to Condensed Consolidated Financial Statements for additional information regarding our debt agreements.

Income Tax Provision

During the three months ended March 31, 2012, the provision for income taxes decreased to $1.8 million from $3.2 million in the comparable period in 2011. The effective income tax rate for the three months ended March 31, 2012 was approximately 40.6% compared to 48.3% for the three months ended March 31, 2011. The change in the provision for income taxes and the effective income tax rate is primarily a result of the decrease in the consolidated pre-tax book income and the taxes computed based on a lower ratio of year-to-date foreign losses as compared to the overall consolidated pre-tax book income for which no benefit could be taken and partially offset by discrete items impacting the quarter ended March 31, 2012. Discrete items included an increase in the income tax provision related to the establishment of a valuation allowance against certain Luxembourg deferred tax assets.

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Our effective income tax rate is subject to change as a result of shifts of taxable income earned by entities in jurisdictions which have a range of differing income tax rates. The effective income tax rate is also subject to shifts of net operating losses that cannot be benefited between certain jurisdictions. Our effective income tax rate is more sensitive to shifts of income between our Americas and EMEA regions and more specifically between our United States and Irish operating entities. This is primarily due to the disparity in the income tax rates between these jurisdictions. Accordingly, an increase or decrease in the ratio of income earned by our U.S. operating entities compared to the income before taxes earned by our non-U.S. operating entities, most notably our Irish operating entities, may cause a corresponding increase or decrease in our overall effective tax rate.

We are currently under examination by the Internal Revenue Service, California Franchise Tax Board, German Tax Authorities, Her Majesty’s Revenue & Customs (UK), and the French tax authority. We believe appropriate provisions for all outstanding issues have been made for all jurisdictions and all open years. However, due to the risk that audit outcomes and the timing of audit settlements are subject to significant uncertainty and as we continue to evaluate such uncertainties in light of current facts and circumstances, our current estimate of the total amounts of unrecognized tax benefits could increase or decrease for all open tax years. As of the date of this report, we do not anticipate that there will be any material change in the unrecognized tax benefits associated with these audits within the next twelve months.

Noncontrolling Interest

In connection with our acquisition of a 60 percent voting equity interest of Smarsh, Inc. in October 2011, the minority shareholder who holds the remaining 40 percent noncontrolling interest was granted the right to require us to purchase half of the 40 percent noncontrolling interest from the first anniversary until the fifth anniversary of the acquisition date. This 20 percent noncontrolling interest is accounted for as redeemable noncontrolling interest because redemption is outside our control. As such, the 20 percent redeemable noncontrolling interest is reported in the mezzanine section as temporary equity in our consolidated balance sheets. The remaining 20 percent is presented within total equity in our consolidated balance sheets. We present the amount of consolidated net income that is attributable to Quest Software, Inc. and the noncontrolling interest in our consolidated income statements. Net income per share is calculated based on net income attributable to Quest Software, Inc. stockholders. Please refer to Note 13 – Noncontrolling Interest of our Notes to Consolidated Financial Statements for additional details.

Liquidity and Capital Resources

Cash and cash equivalents and short-term and long-term investments were approximately $282.4 million and $253.8 million as of March 31, 2012 and December 31, 2011, respectively. Of these amounts, $248.5 million and $223.0 million as of March 31, 2012 and December 31, 2011, respectively, are domiciled in locations outside of the U.S. If such funds are needed for our U.S. operations, the repatriation of cash balances from our foreign subsidiaries would result in the recognition and payment of U.S. income taxes. We do not plan to repatriate cash balances from our foreign subsidiaries to fund our operations within the U.S.

We maintain positions in certain foreign currencies which may at times create unrealized gains or losses. Unrealized foreign currency gains/losses should have been presented as an adjustment to reconcile net income to net cash provided by operating activities in our consolidated statement of cash flows in prior years. Effective during the third quarter of 2011, we presented such unrealized foreign currency gains/losses in our consolidated statement of cash flows. This change impacts our cash flow presentation and does not impact earnings or cash balances. Management has concluded that the change of presentation is not material to any periods affected. We have adjusted previously reported statement of cash flows to conform to the current year presentation (please refer to Note 1 – Organization and Basis of Presentation of our Notes to Condensed Consolidated Financial Statements for the impact to prior period).

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Summarized annual cash flow information is as follows (in thousands):

	Three Months Ended
	March 31
	2012			2011
Cash provided by operating activities	$	52,248		$	69,644
Cash used in investing activities		(19,410	)		(82,041	)
Cash used in financing activities		(4,701	)		(63,258	)
Effect of exchange rate changes		(296	)		4,537
Net increase (decrease) in cash and cash equivalents	$	27,841		$	(71,118	)

Operating Activities

Cash provided by operating activities is primarily comprised of net income, adjusted for non-cash activities such as depreciation and amortization and compensation expenses associated with stock-based payments. These non-cash adjustments represent charges reflected in net income and, therefore, to the extent that non-cash items increase or decrease our future operating results, there will be no corresponding impact on our cash flows. After excluding the effects of these non-cash charges, the primary changes in cash flows relating to operating activities resulted from changes in operating assets and liabilities. The analyses of the changes in our operating assets and liabilities are as follows:

• Accounts receivable, net decreased by $64.5 million to $137.1 million at March 31, 2012 compared to December 31, 2011 resulting in a decrease in operating assets and reflecting a cash inflow of $65.9 million for the three months ended March 31, 2012. Days sales outstanding (“DSO”), improved to 59 days at March 31, 2012 compared to 75 days at December 31, 2011. An improvement of this size is typical from December 31 to the following quarter, and such rate of improvement should not be expected from March 31 to the next quarter. Our daily sales decreased to $2.3 million for the quarter ended March 31, 2012 compared to $2.7 million for the quarter ended December 31, 2011. Collection of accounts receivable and related DSO could fluctuate in future periods due to the timing and amount of our revenues and their linearity and the effectiveness of our collection efforts.

• Deferred revenue decreased to $479.2 million at March 31, 2012 from $499.8 million at December 31, 2011, resulting in a decrease in operating liabilities and reflecting a cash outflow of $20.6 million for the three months ended March 31, 2012. We typically experience a drop in deferred revenue from December 31 to the following quarter. In addition, deferred revenue decreased due to much lower acquired deferred revenue balances from acquisitions.

• Total income taxes payable decreased by $4.0 million to $55.0 million at March 31, 2012 compared to December 31, 2011 resulting in a decrease in operating liabilities and reflecting a cash outflow of $7.7 million for the three months ended March 31, 2012. Net cash paid for income taxes for the three months ended March 31, 2012 was $8.7 million.

Investing Activities

Cash outflows from investing activities for the three months ended March 31, 2012 included approximately $7.6 million paid for acquisitions. Also, we paid $6.0 million for purchases of investment securities and $8.1 million in capital expenditures. In addition, we received $5.5 million in proceeds from the sale and maturities of our investment securities.

During the second quarter of 2011, we entered into a land contract and development agreement for facilities to house our Business Operations and Advanced Technology Center in Cork, Ireland. Under the development agreement, we will temporarily lease office space during the construction of the building. Total expected cost of the land and building is approximately $30 million. As of March 31, 2012, we incurred $5.2 million for the land and $10.5 million for the construction of the building. We anticipate moving into our new building during the fourth quarter of 2012.

We expect that we will continue to purchase property and equipment needed in the normal course of our business. We plan to use excess cash generated from operations to invest in short and long-term investments consistent with past investment practices. Also, we plan to use cash generated from operations and/or proceeds from our investment securities to fund other strategic investment and acquisition opportunities that we continue to evaluate.

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Financing Activities

Cash flows from financing activities in the three months ended March 31, 2012 included $20.1 million paid for our loans payable and net proceeds of $14.8 million from the issuance of our common stock due to exercises of stock options.

In 2009, we entered into a two year revolving line of credit agreement for up to $100 million with Wells Fargo Foothill, LLC as the arranger, administrative agent and lender. On February 17, 2011, this line of credit agreement was amended and renewed for a subsequent five-year term with Wells Fargo Capital Finance, LLC (formerly known as Wells Fargo Foothill, LLC), as arranger, administrative agent and lender (for additional information on our loans payable, please refer to Note 9 – Loans Payable of our Notes to Condensed Consolidated Financial Statements). In October 2011, we used approximately $56 million of this line of credit to fund our acquisition of a 60% voting equity interest in Smarsh, Inc. In addition, we partly funded another acquisition in November 2011 for $35 million through this line of credit. In February 2012, we paid $20 million of the outstanding balance. As of March 31, 2012, we had an outstanding loan balance of $71 million recorded in current liabilities in our consolidated balance sheets.

In August 2009, we entered into a loan agreement with Mutual of Omaha Bank whereby we borrowed an aggregate principal amount of $34 million. The loan is secured by our real property at our headquarters in Aliso Viejo, California. We used the proceeds from the loan for working capital and other general corporate purposes. The loan matures in five years, during which time we will make equal monthly principal and interest payments at a 7.03% interest rate on a fixed rate, 25-year amortization schedule. Events of default include, among other things, payment defaults, breaches of covenants and bankruptcy events. In the case of a continuing event of default, the lender may, among other things, accelerate the payment of any unpaid principal and interest amounts, increase the then-current interest rate by 5% and foreclose on the real estate collateral. As of March 31, 2012, we had an outstanding loan balance of $0.6 million and $32.0 million recorded in current liabilities and long-term liabilities, respectively, in our condensed consolidated balance sheets.

We were in compliance with all debt-related covenants at March 31, 2012. For additional information on our loans payable, please refer to Note 9 – Loans Payable of our Notes to Condensed Consolidated Financial Statements.

As we continue to evaluate potential acquisitions or investments, potential future stock repurchases or other general corporate expenditures which may be in excess of current cash available within certain operating entities, we plan to continue to evaluate potential debt financings when and if reasonable financing terms become available to us.

Based on our current operating plan, we believe that our existing cash, cash equivalents, investment balances, cash flows from operations and available debt financing will be sufficient to finance our operational cash needs through at least the next 12 months. Our ability to generate cash from operations is subject to substantial risks described under Part I, Item 1A, Risk Factors, of our Annual Report on Form 10-K for the year ended December 31, 2011. One of these risks is that our future business does not stay at a level that is similar to, or better than, our recent past. In that event, we may be unable to generate or sustain positive cash flow from operating activities. We would then be required to use existing cash, cash equivalents, investment balances and debt financing to support our working capital and other cash requirements. Also, acquisitions are an important part of our business model. As such, significant amounts of cash could and will likely be used in the future for additional acquisitions or strategic investments. If additional funds are required to support our working capital requirements, acquisitions or other purposes, we may seek to raise funds through public or private equity or, as discussed above, debt financing or from other sources. We can provide no assurance that additional financing will be available at all or, if available, that we would be able to obtain additional financing on terms favorable to us.

Recently Adopted Accounting Pronouncements

See Note 2 – Recent Accounting Pronouncements of our Notes to Condensed Consolidated Financial Statements for information regarding recent accounting pronouncements.

Critical Accounting Policies and Estimates

The preparation of financial statements in accordance with generally accepted accounting principles requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses. On an on-going basis, we make and evaluate estimates and judgments, including those related to revenue recognition, asset valuations (including accounts receivable, goodwill and intangible assets), share-based compensation, income taxes and functional currencies for purpose of consolidation. We base our estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances. Our estimates form the basis for making judgments about amounts and timing of revenue and expenses, the carrying values of assets, and the recorded amounts of liabilities that are not readily apparent from other sources. Actual results may differ from these estimates and such estimates may change if the underlying conditions or assumptions change. We have discussed the development and selection of the critical accounting policies with the Audit Committee of our Board of Directors, and the Audit Committee has reviewed our related disclosures. The critical accounting policies related to the estimates and judgments listed above are discussed further in our Annual Report on Form 10-K for the year ended December 31, 2011 under Part II, Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations. There have been no material changes to our critical accounting policies or estimates during the three months ended March 31, 2012.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

Foreign Exchange Risk

We are a U.S. Dollar functional company and transact business in a number of different foreign countries around the world. In most instances, revenues are collected and operating expenses are paid in the local currency of the country in which we are transacting. Accordingly, we are exposed to both transaction and translation risk relating to changes in foreign exchange rates.

Our exposure to foreign exchange risk originates both from our foreign operations net profits and losses denominated in currencies other than the U.S. Dollar, as well as our net balances of monetary assets and liabilities in our foreign subsidiaries. These exposures have the potential to produce either gains or losses depending on the directional movement of the foreign currencies versus the U.S. Dollar and our operational profile in foreign subsidiaries. Our cumulative currency gains or losses in any given period may be lessened by the economic benefits of diversification and the correlative relationships of different currencies, but there can be no assurance that this pattern will continue to be true in future periods. During the three months ended March 31, 2012, we had a negative effect of $0.3 million on total revenues and a positive effect of $0.8 million to total expenses related to foreign currency fluctuation when comparing average monthly 2012 rates to 2011. In addition, during the three months ended March 31, 2012, we had foreign currency gains of $1.6 million within Other (expense) income, net compared to $3.1 million in the comparable period in 2011.

The foreign currencies to which we currently have the most significant exposure are the Euro, the Canadian Dollar, the British Pound, the Australian Dollar and the Russian Ruble. We enter into hedges in the form of foreign currency contracts to reduce the range of outcomes that foreign currency rate changes can have on non-functional currency denominated forecasted transactions and balance sheet positions, which include certain monetary assets and liabilities denominated in foreign currencies. The foreign currency contracts are carried at fair value and denominated in various currencies as listed in the tables below. The durations of these contracts range from less than one month to nine months. A description of our accounting for foreign currency contracts is included in Note 15 – Derivative Instruments of our Notes to Condensed Consolidated Financial Statements.

The magnitude of success of our hedging activities depends upon the accuracy of our estimates of various balances and transactions denominated in non-functional currencies. To the extent our estimates are correct, gains and losses on our foreign currency contracts will be offset by corresponding losses and gains on the underlying transactions. In order to monitor the financial impact of our foreign currency hedges, we subject our hedges to a stress test. This test is intended to quantify the impact to our financial statements of an abnormal change in the foreign currency rates in which we do business. When subjected to a 10% and 20% adverse change, we estimate that the fair value of our contracts would decline by $6.5 million and $13.0 million, respectively.

We do not use forward foreign currency contracts for speculative or trading purposes. We enter into foreign currency contracts with reputable financial institutional counterparties whose financial health we monitor. To date, we have not experienced nonperformance by any of these counterparties and anticipate performance by all counterparties.

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The following table summarizes the notional amounts of our outstanding foreign currency contracts at March 31, 2012 and December 31, 2011. All contracts have maturities of twelve months or less. (in U.S. Dollars in thousands):

Currency	March 31 2012		December 31 2011
Australian Dollar	$	11,181	$	12,216
Canadian Dollar		8,415		14,158
Chinese Yuan		1,747		2,776
Danish Krone		1,255		891
Euro		36,498		40,398
British Pound		6,354		7,950
Israeli Shekel		2,370		3,773
Brazil Real		3,988		3,826
Swedish Krona		1,359		446
Japanese Yen		3,688		6,439
South Korean Won		2,217		2,193
Norwegian Krone		1,774		1,073
Russian Ruble		5,012		8,433
Total	$	85,858	$	104,572

Interest Rate Risk

Our exposure to market interest-rate risk relates primarily to our investment portfolio. We traditionally do not use derivative financial instruments to hedge the market risks of our investments. We place our investments with high-quality issuers and money market funds and articulate allocation limits in our investment policy to any one issuer other than the United States government. Our investment portfolio as of March 31, 2012 consisted of money market funds, U.S. Treasuries, US agency securities, certificates of deposit and corporate bonds. Investments purchased with an original maturity of three months or less are considered to be cash equivalents. We classify our investments as available-for-sale securities. Available-for-sale securities are carried at fair value, with unrealized gains and losses, net of tax, reported in a separate component of stockholders’ equity. Trading securities are carried at fair value, with changes in fair value reported in earnings.

Information about our investment portfolio is presented in the table below, which states the amortized book value and related weighted-average interest rates by year of maturity (in thousands):

	Amortized Book Value		Weighted Average Rate
Investments maturing by March 31
2013(1)	$	179,684		0.45	%
2014		13,805		1.46	%
2015		3,259		3.30	%
2016		1,951		3.31	%
2017 and thereafter		—		—
Total portfolio	$	198,699		0.59	%

(1) Includes $136.6 million in cash equivalents.

Please refer to Note 5 – Cash and Cash Equivalents and Investments of our Notes to Condensed Consolidated Financial Statements for additional information regarding our investment portfolio.

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Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures designed to provide reasonable assurance that information required to be disclosed in reports filed under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) is recorded, processed, summarized and reported within the specified time periods and accumulated and communicated to management, including our chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure.

Our management, with the participation of our chief executive officer and chief financial officer, evaluated the effectiveness of our disclosure controls and procedures as of March 31, 2012 as required by paragraph (b) of Rule 13a-15 or Rule 15d-15 of the Exchange Act. Based on that evaluation, our chief executive officer and chief financial officer have concluded that, as of that date, our disclosure controls and procedures as defined in Rules 13a-15(e) or 15d-15(e) under the Exchange Act were not effective, at the reasonable assurance level, because of the identification of a material weakness in its internal control over financial reporting, described below, which the Company views as an integral part of its disclosure controls and procedures.

In our 10-K filing for the fiscal year ending December 31, 2011, management had reported we did not maintain effective internal controls over financial reporting related to the income tax provision process. Specifically, the Company did not deploy or utilize sufficient internal or external resources, systems, and timely process changes to support our reporting needs in accordance with the growth and complexity of our overall business and the enhanced internal controls that were put in place during the fourth quarter of 2011. The level of resources deployed was insufficient to reduce the likelihood of detecting material adjustments to the Company’s books and records. This material weakness resulted in the need to record immaterial adjustments. However, as a result of these errors we determined that there was a reasonable possibility that a material misstatement to the annual or interim financial statements would not have been prevented or detected. Accordingly, management determined that the control deficiency constituted a material weakness.

Remediation Steps to Address the Material Weakness

As part of our continuing evaluation of and improvement of the effectiveness of our internal control over financial reporting, we have taken or are taking the following measures to remediate the material weakness described above.

• We are continuing to evaluate the staffing level and qualifications of tax department personnel and will continue to make changes as deemed appropriate.

• During the first quarter of 2012, we have expanded our use of checklists for quarterly responsibilities in order to improve efficiencies. We will continue to enhance our tax compliance and provision processes and procedures through further use of checklists for key tasks to improve effectiveness and efficiency.

• We are currently evaluating and making modifications to the manner with which we use external resources, to provide greater assurance that these resources are effectively managed, and deployed.

• We plan to deploy additional software systems to assist in automating and controlling certain processes within the tax function.

Changes in Internal Control Over Financial Reporting

There have not been any changes in our internal control over financial reporting that occurred during the quarter ended March 31, 2012 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting, notwithstanding the remediation efforts, as noted above.

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PART II—OTHER INFORMATION

Item 1. Legal Proceedings

The information set forth under Note 17 – Commitments and Contingencies of our Notes to Condensed Consolidated Financial Statements, included in Part I, Item 1, Financial Statements, of this Report, is incorporated herein by reference. For an additional discussion of certain risks associated with legal proceedings, see the section entitled Part I, Item 1A, Risk Factors, of our Annual Report on Form 10-K for the year ended December 31, 2011.

Item 1A. Risk Factors

You should carefully consider the risks described in Part I, Item 1A, Risk Factors, of our Annual Report on Form 10-K for the year ended December 31, 2011, as our business, financial condition and results of operations could be adversely affected by any of the risks and uncertainties described therein. Other than as provided below. there have been no material changes in our risk factors from those disclosed in the reports listed above.

There are risks and uncertainties associated with our proposed merger with Expedition Holding Company, Inc. and Expedition Merger Sub, Inc.

As previously announced, on March 8, 2012, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Expedition Holding Company, Inc., a Delaware corporation (“Parent”), and Expedition Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Expedition Holding Company, Inc. (“Merger Sub”), providing for the merger of Merger Sub with and into the Company (the “Merger”), with the Company surviving the merger as a wholly owned subsidiary of Parent. Parent and Merger Sub are beneficially owned by funds affiliated with Insight Venture Management, LLC, a Delaware limited liability company.

There are a number of risks and uncertainties relating to the Merger. For example, the Merger may not be consummated or may not be consummated in the timeframe or manner currently anticipated, as a result of several factors, including, among other things, (i) the occurrence of any event, change or other circumstances that could give rise to the termination of the Merger Agreement, including a termination under circumstances that would require us to pay a termination fee; or (ii) Parent’s failure to obtain the necessary debt or equity financing set forth in the equity commitment letter received in connection with the Merger, or alternative financing, or the failure of any such financing to be sufficient to complete the Merger and the transactions contemplated by the Merger Agreement. In addition, there can be no assurance that approval of our stockholders will be obtained, that the other conditions to closing of the Merger will be satisfied or waived or that other events will not intervene to delay or result in the termination of the Merger. If the Merger is not completed, the price of our common stock may change to the extent that the current market price of our common stock may reflect an assumption that the Merger will be consummated.

Pending the closing of the Merger, the Merger Agreement also restricts us from engaging in certain actions without Parent’s consent, which could prevent us from pursuing opportunities that may arise prior to the closing of the merger. Any delay in closing or a failure to close could have a negative impact on our business and stock price as well as our relationships with our customers, vendors or employees, as well as a negative impact on our ability to pursue alternative strategic transactions and/or our ability to implement alternative business plans. In addition, if the Merger Agreement is terminated, depending on the circumstances giving rise to termination, we may be required to (i) reimburse Parent, Merger Sub and their respective affiliates for their out-of-pocket expenses incurred in connection with the Merger Agreement, up to a maximum of $7.0 million (“Parent Expenses”), and (ii) pay a termination fee (excluding any Parent Expenses), up to a maximum of $6.3 million. In addition, in the event that the Merger Agreement is terminated under certain specified circumstances, including due to a willful or intentional breach of the Company, then Parent may recover up to a maximum of $12.6 million (inclusive of any termination fee paid) for all actual losses suffered or incurred by Parent with respect to any legal proceedings formally commenced within 120 days following Parent’s termination of the Merger Agreement.

Our business could be adversely impacted as a result of uncertainty related to the proposed merger.

The proposed merger could cause disruptions to our business or business relationships, which could have an adverse impact on our financial condition, results of operations and cash flows. For example:

• the attention of our management may be directed to transaction-related considerations and may be diverted from the day-to-day operations of our business;

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• our employees may experience uncertainty about their future roles with us, which might adversely affect our ability to retain and hire key personnel and other employees; and

• customers, suppliers or other parties with which we maintain business relationships may experience uncertainty about our future and seek alternative relationships with third parties or seek to alter their business relationships with us.

In addition, we have incurred, and will continue to incur, significant costs, expenses and fees for professional services and other transaction costs in connection with the merger, and many of these fees and costs are payable by us regardless of whether or not the merger is consummated.

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

Issuer Purchases of Equity Securities

The table below summarizes information about our purchases of equity securities registered pursuant to Section 12 of the Exchange Act during the quarterly period ended March 31, 2012.

Period	Total Number of Shares of Common Stock Purchased (1)		Price Paid per Share of Common Stock (2)		Total Number of Shares of Common Stock Purchased as Part of Publicly Announced Plans or Programs (1)		Maximum Approximate Dollar Value of Shares of Common Stock that May Yet Be Purchased Under the Plans or Programs (in millions)
Jan. 1, 2012 through Jan. 31, 2012		—	$	—		—	$	68.0
Feb. 1, 2012 through Feb. 29, 2012		—	$	—		—	$	68.0
Mar. 1, 2012 through Mar. 31, 2012		—	$	—		—	$	68.0
Total		—	$	—		—	$	68.0

(1) In May 2011, our Board of Directors authorized a stock repurchase program covering up to $200 million of our common stock. Any stock repurchases may be made through open market and privately negotiated transactions, at times and in such amounts as management deems appropriate, including pursuant to one or more Rule 10b5-1 trading plans. Rule 10b5-1 permits Quest to establish, while not in possession of material nonpublic information, prearranged plans to buy stock at a specific price in the future, regardless of any subsequent possession of material nonpublic information. The timing and actual number of shares repurchased will depend on a variety of factors including market conditions, corporate and regulatory requirements, and capital availability. The stock repurchase program does not have an expiration date and may be limited or terminated at any time without prior notice.

(2) The price paid per share of common stock does not include the related transaction costs.

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Item 6. Exhibits

Exhibit Number	Exhibit Title
2.1*	Agreement and Plan of Merger, dated as of March 8, 2012, by and among Expedition Holding Company, Inc., Expedition Merger Sub, Inc. and Quest Software, Inc. (incorporated by reference to our Current Report on Form 8-K filed on March 9, 2012)
3.1*	Certificate of Incorporation of Quest Software, Inc. (incorporated by reference to our Current Report on Form 8-K filed on April 30, 2009)
3.2*	Bylaws of Quest Software, Inc. (incorporated by reference to our Current Report on Form 8-K filed on April 30, 2009)
4.1*	Form of Registrant’s Specimen Common Stock Certificate (incorporated by reference to our Registration Statement on Form S-1 and all amendments thereto filed on June 11, 1999 (File No. 333-80543))
10.1* ++	Limited Guaranty, dated as of March 8, 2012, by Insight Venture Partners VII, L.P., Insight Venture Partners (Cayman) VII, L.P., Insight Venture Partners VII (Co-Investors), L.P., Insight Venture Partners (Delaware) VII, L.P., Insight Venture Partners Coinvestment Fund II, L.P., Vincent C. Smith, the Vincent C. Smith Annuity Trust 2010-1, the Vincent C. Smith Annuity Trust 2010-2 and the Vincent C. Smith Annuity Trust 2011-1 in favor of Quest Software, Inc. (incorporated by reference to our Current Report on Form 8-K filed on March 9, 2012)
10.2* ++	Voting Agreement, dated as of March 8, 2012, among Vincent C. Smith, the Vincent C. Smith Annuity Trust 2010-1, the Vincent C. Smith Annuity Trust 2010-2 and the Vincent C. Smith Annuity Trust 2011-1 and Quest Software, Inc. (incorporated by reference to our Current Report on Form 8-K filed on March 9, 2012)
10.3* ++	Quest Software, Inc. Change in Control Severance Plan (incorporated by reference to our Current Report on Form 8-K filed on March 9, 2012)
10.4* ++	Written description of retention agreement with Scott J. Davidson (incorporated by reference to Item 5.02 of our Current Report on Form 8-K filed on March 23, 2012)
31.1	Certification of the Chief Executive Officer Pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended.
31.2	Certification of the Chief Financial Officer Pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended.
32.1	Certification of Chief Executive Officer and 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.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

* Incorporated by reference

++ Indicates a management contract or compensatory arrangement

39

SIGNATURES

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

	QUEST SOFTWARE, INC.
Date: May 10, 2012	/s/    Scott J. Davidson
	Scott J. Davidson Senior Vice President, Chief Financial Officer
	/s/    Scott H. Reasoner
	Scott H. Reasoner Vice President, Corporate Controller

40

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Vincent C. Smith, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Quest Software, Inc.;

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 (the registrant’s fourth fiscal quarter in the case of an annual report) 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: May 10, 2012

/s/    Vincent C. Smith        

Vincent C. Smith

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Scott J. Davidson, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Quest Software, Inc.;

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 (the registrant’s fourth fiscal quarter in the case of an annual report) 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: May 10, 2012

/s/    Scott J. Davidson          

Scott J. Davidson

Senior Vice President, Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer and Chief Financial Officer Pursuant to

18 U.S.C. Section 1350, as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350), Vincent C. Smith, Chief Executive Officer of Quest Software, Inc. (the “Company”), and Scott J. Davidson, Chief Financial Officer of the Company, each hereby certifies that, to the best of his or her knowledge:

1. The Company’s Quarterly Report on Form 10-Q for the three months ended March 31, 2012, to which this Certification is attached as Exhibit 32.1 (the “Quarterly Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Exchange Act, and

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

In Witness Whereof, the undersigned have set their hands hereto as of the 10^th day of May, 2012.

/s/    Vincent C. Smith	/s/    Scott J. Davidson
Vincent C. Smith	Scott J. Davidson
Chief Executive Officer	Chief Financial Officer

This certification accompanies the Form 10-Q to which it relates, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference into any filing of Quest Software, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (whether made before or after the date of the Form 10-Q), irrespective of any general incorporation language contained in such filing.

XML

Organization, Proposed Merger And Bases Of Presentation (Impact Of Tax Correction To The Consolidated Income Statement) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Other income, net	$ (874)	$ 1,156
Income before income tax provision	4,379	6,522
Income tax provision	1,778	3,151
Net income	2,601	3,371
Net income attributable to Quest Software, Inc.	2,668	3,371
Basic	$ 0.03	$ 0.04
Diluted	$ 0.03	$ 0.04
As Previously Reported [Member]
Other income, net		1,269
Income before income tax provision		6,635
Income tax provision		3,006
Net income		3,629
Net income attributable to Quest Software, Inc.		3,629
Basic		$ 0.04
Diluted		$ 0.04
As Corrected [Member]
Other income, net		1,156
Income before income tax provision		6,522
Income tax provision		3,151
Net income		3,371
Net income attributable to Quest Software, Inc.		3,371
Basic		$ 0.04
Diluted		$ 0.04
Increase/(Decrease) [Member]
Other income, net		(113)
Income before income tax provision		(113)
Income tax provision		145
Net income		(258)
Net income attributable to Quest Software, Inc.		$ (258)

XML

Other (Expense) Income, Net (Schedule Of Other (Expense) Income, Net) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Other (Expense) Income, Net [Abstract]
Interest income	$ 525		$ 537
Interest expense	(1,131)		(980)
Foreign currency gains, net	1,557	[1]	3,103	[1]
Foreign currency contracts losses, net	(1,743)	[2]	(1,613)	[2]
Other (expense) income	(82)		109
Total other (expense) income, net	$ (874)		$ 1,156

[1] Our foreign currency gains, net are predominantly attributable to the re-measurement gains or losses on our net balances of monetary assets and liabilities in our foreign subsidiaries which were primarily denominated in the Euro, and to a lesser extent, the British Pound and Canadian Dollar. The foreign currency re-measurement adjustments to these balance sheet items are calculated by comparing the currency spot rates at the end of a month to the spot rates at the end of the previous month.

[2] Relates to changes in fair value of our forward foreign currency contracts not designated as hedging instruments. See Note 15 — Derivative Instruments for further details.

XML

Goodwill And Intangible Assets, Net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Goodwill And Intangible Assets, Net [Abstract]
Amortization expense for intangible assets	$ 12.0	$ 8.6
Impairment of customer relationships related to ChangeBase	$ 3.4

XML

Commitments And Contingencies (Details) (USD $)	1 Months Ended	3 Months Ended
	Oct. 31, 2011	Mar. 31, 2012	Dec. 31, 2011
Commitments And Contingencies [Line Items]
Rate of equity interest in Smarsh, Inc.	60.00%
Noncontrolling interest, percentage	40.00%
Maximum redemption value payable		$ 22,000,000
Redeemable noncontrolling interest, percentage		20.00%
Carrying amount of the redeemable noncontrolling interest		22,000,000	22,000,000
Expenses incurred in construction		97,537,000	94,602,000
Construction In Progress - Building [Member]
Commitments And Contingencies [Line Items]
Expenses incurred in construction		10,500,000
Capital expenditures		14,000,000
Land [Member]
Commitments And Contingencies [Line Items]
Expenses incurred in construction		$ 5,200,000

XML

Income Tax Provision (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Tax Provision [Abstract]
Provision for income taxes	$ 1,778	$ 3,151
Effective income tax rate	40.60%	48.30%

XML

Cash And Cash Equivalents And Investments (Summary Of Investments By Investment Category) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Cash And Cash Equivalents And Investments [Line Items]
Total investments, Amortized Cost	$ 62,129	$ 61,652
Total investments, Gross Unrealized Gains	248	150
Total investments, Gross Unrealized Losses	(17)	(196)
Total investments, Fair Value	62,360	61,606
Short-term available-for-sale investments, average remaining maturity period	5 months
Long-term available-for-sale investments, average remaining maturity period	21 months
U.S. Treasury Securities [Member]
Cash And Cash Equivalents And Investments [Line Items]
Available-for-sale securities, Amortized Cost	9,496	6,920
Available-for-sale securities, Gross Unrealized Gains		1
Available-for-sale securities, Gross Unrealized Losses	(1)
Available-for-sale securities, Fair Value	9,495	6,921
U.S. Agency Securities [Member]
Cash And Cash Equivalents And Investments [Line Items]
Available-for-sale securities, Amortized Cost	3,515	5,526
Available-for-sale securities, Gross Unrealized Gains	17	25
Available-for-sale securities, Gross Unrealized Losses
Available-for-sale securities, Fair Value	3,532	5,551
Corporate Notes/Bonds [Member]
Cash And Cash Equivalents And Investments [Line Items]
Available-for-sale securities, Amortized Cost	47,397	47,600
Available-for-sale securities, Gross Unrealized Gains	231	124
Available-for-sale securities, Gross Unrealized Losses	(16)	(196)
Available-for-sale securities, Fair Value	47,612	47,528
Certificates/Term Deposits [Member]
Cash And Cash Equivalents And Investments [Line Items]
Available-for-sale securities, Amortized Cost	1,721	1,606
Available-for-sale securities, Gross Unrealized Gains
Available-for-sale securities, Gross Unrealized Losses
Available-for-sale securities, Fair Value	$ 1,721	$ 1,606

XML

Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Stock-Based Compensation [Abstract]

Weighted-Average Assumptions For Option Awards Granted

	Three Months Ended March 31
	2012			2011
Expected volatility		36	%		34	%
Expected term (in years)		5.7			5.7
Risk-free interest rate		1.0	%		2.1	%
Expected dividend yield		None			None

Summary Of Employee Stock Options Activity

	Number of Shares (in thousands)			Weighted-Average Exercise Price (per share)		Weighted-Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands) (1)
Outstanding at December 31, 2011		15,779		$	17.26
Granted		133		$	19.36
Exercised		(863	)	$	17.27
Canceled/forfeited/expired		(427	)	$	18.25
Outstanding at March 31, 2012		14,622		$	17.24		7.22	$	93,754
Vested or expected to vest at March 31, 2012		13,502		$	17.19		7.07	$	87,229
Exercisable at March 31, 2012		5,989		$	15.42		5.00	$	48,501

(1) These amounts represent the difference between the exercise price and $23.27, the closing price of Quest Software, Inc. stock on March 31, 2012 as reported on the NASDAQ National Market, for all options outstanding that have an exercise price currently below the closing price.

Summary Of RSU Awards Activity

	Number of Shares			Weighted-Average Grant Date Fair Value (per share)
Nonvested at January 1, 2012		236,331		$	15.88
Granted		—		$	—
Vested		(86,524	)	$	14.66
Forfeited		(9,623	)	$	15.91
Nonvested at March 31, 2012(1)		140,184		$	16.63

(1) 132,135 of these shares are expected to vest.

Classification Of Stock-Based Compensation Expense

	Three Months Ended March 31
	2012		2011
Cost of services	$	232	$	316
Sales and marketing		1,728		2,109
Research and development		1,497		2,152
General and administrative		2,628		2,836
Total stock-based compensation		6,083		7,413
Tax benefit associated with stock-based compensation expense (1)		2,385		2,869
Reduction of net income	$	3,698	$	4,544

(1) The recognized tax benefit related to stock-based compensation expense was estimated to be 39.2% and 38.7% for the quarter ended March 31, 2012 and 2011, respectively. This approximates the blended Federal and State statutory tax rate after the benefit for state taxes.

XML

Noncontrolling Interest (Details) (USD $)	1 Months Ended	3 Months Ended
	Oct. 31, 2011	Mar. 31, 2012	Dec. 31, 2011
Noncontrolling Interest [Line Items]
Rate of equity interest in Smarsh, Inc.	60.00%
Noncontrolling interest, percentage	40.00%
Maximum redemption value payable		$ 22,000,000
Redeemable noncontrolling interest, percentage		20.00%
Remaining noncontrolling interest presented within total equity, percentage		20.00%
Carrying amount of the redeemable noncontrolling interest		22,000,000	22,000,000
Net income (loss) attributable to redeemable non-controlling interest		$ 100,000
Smarsh, Inc. [Member]
Noncontrolling Interest [Line Items]
Rate of equity interest in Smarsh, Inc.	60.00%

XML

Organization, Proposed Merger And Bases Of Presentation (Tables)

3 Months Ended

Mar. 31, 2012

Organization, Proposed Merger And Bases Of Presentation [Abstract]

Impact To Previously Reported Consolidated Statement Of Cash Flows

	Three Months Ended March 31, 2011
	As  Previously Reported		As Adjusted		Impact
Unrealized foreign currency gains, net	$	—	$	(3,459)	$	(3,459	)
Changes in operating assets and liabilities, net of effects of acquisitions		48,912		50,688		1,776
Net cash provided by operating activities		71,327		69,644		(1,683	)
Effect of exchange rate changes in cash and cash equivalents		2,854		4,537		1,683
Net impact						—

Impact Of The Tax Correction To The Previously Reported Consolidated Financial Statements

Corrected Consolidated Balance Sheet:

	December 31, 2011
	As  Previously Reported		As Corrected		Increase/ (Decrease)
Deferred income taxes, net – current	$	19,780	$	21,647	$	1,867
Total current assets		496,201		498,068		1,867
Total assets		1,697,651		1,699,518		1,867
Income taxes payable – current		—		14,482		14,482
Total current liabilities		591,101		605,583		14,482
Total liabilities		795,502		809,984		14,482
Retained earnings		345,672		333,057		(12,615	)
Total Quest Software Inc. stockholders' equity		867,200		854,585		(12,615	)
Total equity		880,149		867,534		(12,615	)
Total liabilities and equity		1,697,651		1,699,518		1,867

Corrected Consolidated Income Statement:

	Three Months Ended March 31, 2011
	As  Previously Reported		As Corrected		Increase/ (Decrease)
Other income, net	$	1,269	$	1,156	$	(113	)
Income before income tax provision		6,635		6,522		(113	)
Income tax provision		3,006		3,151		145
Net income		3,629		3,371		(258	)
Net income attributable to Quest Software, Inc.		3,629		3,371		(258	)
Net income per share:
Basic	$	0.04	$	0.04	$	—
Diluted	$	0.04	$	0.04	$	—

Corrected Consolidated Statement of Cash Flows:

	Three Months Ended March 31, 2011
	As Adjusted  (1)			As Corrected			Increase/ (Decrease)
Net income	$	3,629		$	3,371		$	(258	)
Unrealized foreign currency gains, net		(3,459	)		(3,346	)		113
Changes in operating assets and liabilities:
Deferred income taxes		(142	)		(221	)		(79	)
Income taxes payable		(916	)		(692	)		224
Net cash provided by operating activities		69,644			69,644		$	—

(1) Refer to the above section "Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods".

XML

Goodwill And Intangible Assets, Net (Components Of Intangible Assets, Net) (Details) (USD $)	Mar. 31, 2012		Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 406,536,000		$ 402,262,000
Accumulated Amortization and Impairments	(267,269,000)		(251,876,000)
Net	139,267,000		150,386,000
Acquired Technology And IPR&D [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	247,654,000	[1]	244,680,000	[1]
Accumulated Amortization and Impairments	(165,042,000)	[1]	(157,944,000)	[1]
Net	82,612,000	[1]	86,736,000	[1]
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	124,018,000		122,918,000
Accumulated Amortization and Impairments	(75,126,000)		(67,193,000)
Net	48,892,000		55,725,000
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,268,000		15,068,000
Accumulated Amortization and Impairments	(14,058,000)		(13,896,000)
Net	1,210,000		1,172,000
Trademarks And Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	19,596,000	[2]	19,596,000	[2]
Accumulated Amortization and Impairments	(13,043,000)	[2]	(12,843,000)	[2]
Net	6,553,000	[2]	6,753,000	[2]
PacketTrap [Member] | Trademarks And Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired indefinite-lived intangible assets	$ 800,000

[1] IPR&D projects were identified and valued related to our acquisitions. These projects are continually assessed for impairment. Upon completion, these projects will be amortized over their estimated useful life.

[2] Trademarks and trade names include $0.8 million in trade names related to our acquisition of PacketTrap that have an indefinite useful life, and as such are not being amortized.

XML

Acquisitions (Allocation Of Purchase Price To Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Business Acquisition [Line Items]
Goodwill	2,700
Total purchase price	6,000
Acquired Technologies [Member]
Business Acquisition [Line Items]
Useful life of amortizable intangible assets (years)	5.2
Customer Relationships [Member]
Business Acquisition [Line Items]
Useful life of amortizable intangible assets (years)	4.0
Trademarks And Trade Names [Member]
Business Acquisition [Line Items]
Useful life of amortizable intangible assets (years)	10.0
BakBone Software Incorporated [Member]
Business Acquisition [Line Items]
Current assets	12,479
Goodwill	18,690
Deferred income tax assets - non-current	9,872
Other non-current assets	2,419
Current liabilities	(6,328)
Deferred revenue - current	(9,383)
Deferred revenue - non-current	(9,491)
Other long-term liabilities	(278)
Total purchase price	55,980
BakBone Software Incorporated [Member] | Acquired Technologies [Member]
Business Acquisition [Line Items]
Amortizable intangible assets	24,500
BakBone Software Incorporated [Member] | IPR&D [Member]
Business Acquisition [Line Items]
Amortizable intangible assets	400
BakBone Software Incorporated [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Amortizable intangible assets	11,300
BakBone Software Incorporated [Member] | Trademarks And Trade Names [Member]
Business Acquisition [Line Items]
Amortizable intangible assets	1,800

XML

Organization, Proposed Merger And Bases Of Presentation (Impact To Previously Reported Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Organization And Basis Of Presentation [Line Items]
Unrealized foreign currency gains, net	$ (3,429)	$ (3,346)
Net cash provided by operating activities	52,248	69,644
Effect of exchange rate changes in cash and cash equivalents	(296)	4,537
Net impact	27,841	(71,118)
As Previously Reported [Member]
Organization And Basis Of Presentation [Line Items]
Changes in operating assets and liabilities, net of effects of acquisitions		48,912
Net cash provided by operating activities		71,327
Effect of exchange rate changes in cash and cash equivalents		2,854
Net impact
As Adjusted [Member]
Organization And Basis Of Presentation [Line Items]
Unrealized foreign currency gains, net		(3,459)	[1]
Changes in operating assets and liabilities, net of effects of acquisitions		50,688
Net cash provided by operating activities		69,644	[1]
Effect of exchange rate changes in cash and cash equivalents		4,537
Net impact
Impact [Member]
Organization And Basis Of Presentation [Line Items]
Unrealized foreign currency gains, net		(3,459)
Changes in operating assets and liabilities, net of effects of acquisitions		1,776
Net cash provided by operating activities		(1,683)
Effect of exchange rate changes in cash and cash equivalents		1,683
Net impact

[1] Refer to the above section "Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods".

XML

Cost Method Investments (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Cost Method Investments [Abstract]
Cost method investments	$ 48.2	$ 46.1

XML

Fair Value Measurements (Summary Of Fair Value Of Financial Assets And Liabilities Measured At Recurring Basis And Valuation Techniques) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	$ 62,360		$ 61,606
Total assets	169,323		131,596
Total liabilities	2,991		4,082
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	117,277		72,855
Total liabilities
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	52,046		58,741
Total liabilities	236		300
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets
Total liabilities	2,755		3,782
Income Approach Valuation Techniques [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	2,755		3,782
Income Approach Valuation Techniques [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration
Income Approach Valuation Techniques [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration
Income Approach Valuation Techniques [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	2,755		3,782
Market Approach Valuation Techniques [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	104,249		65,811
Market Approach Valuation Techniques [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	9,496		6,921
Market Approach Valuation Techniques [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	3,532		5,551
Market Approach Valuation Techniques [Member] | Corporate Notes/Bonds[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	47,612		47,528
Market Approach Valuation Techniques [Member] | Certificates/Term Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	3,042		2,922
Market Approach Valuation Techniques [Member] | Derivative Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,392	[1]	2,863	[1]
Market Approach Valuation Techniques [Member] | Derivative Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	236	[1]	300	[1]
Market Approach Valuation Techniques [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	104,249		65,811
Market Approach Valuation Techniques [Member] | Level 1 [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	9,496		3,499
Market Approach Valuation Techniques [Member] | Level 1 [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	3,532		3,545
Market Approach Valuation Techniques [Member] | Level 1 [Member] | Corporate Notes/Bonds[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total
Market Approach Valuation Techniques [Member] | Level 1 [Member] | Certificates/Term Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total
Market Approach Valuation Techniques [Member] | Level 1 [Member] | Derivative Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		[1]		[1]
Market Approach Valuation Techniques [Member] | Level 1 [Member] | Derivative Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		[1]		[1]
Market Approach Valuation Techniques [Member] | Level 2 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total
Market Approach Valuation Techniques [Member] | Level 2 [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total			3,422
Market Approach Valuation Techniques [Member] | Level 2 [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total			2,006
Market Approach Valuation Techniques [Member] | Level 2 [Member] | Corporate Notes/Bonds[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	47,612		47,528
Market Approach Valuation Techniques [Member] | Level 2 [Member] | Certificates/Term Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total	3,042		2,922
Market Approach Valuation Techniques [Member] | Level 2 [Member] | Derivative Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	1,392	[1]	2,863	[1]
Market Approach Valuation Techniques [Member] | Level 2 [Member] | Derivative Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	236	[1]	300	[1]
Market Approach Valuation Techniques [Member] | Level 3 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total
Market Approach Valuation Techniques [Member] | Level 3 [Member] | U.S. Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total
Market Approach Valuation Techniques [Member] | Level 3 [Member] | U.S. Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total
Market Approach Valuation Techniques [Member] | Level 3 [Member] | Corporate Notes/Bonds[Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total
Market Approach Valuation Techniques [Member] | Level 3 [Member] | Certificates/Term Deposits [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Total
Market Approach Valuation Techniques [Member] | Level 3 [Member] | Derivative Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets		[1]		[1]
Market Approach Valuation Techniques [Member] | Level 3 [Member] | Derivative Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities		[1]		[1]

[1] See Note 15 - Derivative Instruments for details.

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Stock-Based Compensation (Summary Of RSU Awards Activity) (Details) (Restricted Stock Unit Awards [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Restricted Stock Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Nonvested at January 1, 2012	236,331
Number of Shares, Granted
Number of Shares, Vested	(86,524)
Number of Shares, Forfeited	(9,623)
Number of Shares, Nonvested at March 31, 2012	140,184	[1]
Weighted-Average Grant Date Fair Value, Nonvested at January 1, 2012	$ 15.88
Weighted-Average Grant Date Fair Value, Granted
Weighted-Average Grant Date Fair Value, Vested	$ 14.66
Weighted-Average Grant Date Fair Value, Forfeited	$ 15.91
Weighted-Average Grant Date Fair Value, Nonvested at March 31, 2012	$ 16.63	[1]
Number of shares, expected to vest	132,135

[1] 132,135 of these shares are expected to vest.

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Property And Equipment, Net (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Property And Equipment, Net [Abstract]
Building	$ 39,273,000		$ 39,297,000
Furniture and fixtures	17,324,000		17,249,000
Machinery and equipment	9,425,000		9,163,000
Computer equipment	65,180,000		65,331,000
Computer software	52,648,000		51,541,000
Leasehold improvements	18,765,000		18,615,000
Land	16,317,000		16,317,000
Construction in progress - building	10,458,000		6,427,000
Property and equipment, gross	229,390,000		223,940,000
Less accumulated depreciation and amortization	(131,853,000)		(129,338,000)
Property and equipment, net	97,537,000		94,602,000
Depreciation and amortization expense	$ 3,700,000	$ 3,900,000

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Acquisitions

3 Months Ended

Mar. 31, 2012

Acquisitions [Abstract]

Acquisitions

NOTE 3 — ACQUISITIONS

2012 Acquisitions

During the quarter ended March 31, 2012, we completed an acquisition that has been accounted for as business combination. The purchase price for this transaction was approximately $6 million. The preliminary allocation of purchase price was primarily to goodwill and other intangible assets for $2.7 million and $3.8 million, respectively. The preliminary allocation of purchase price was based upon valuation information and estimates and assumptions available at the time of filing. Our estimates and assumptions are subject to change and preliminary valuations are often finalized after a reporting period. The areas of the purchase price allocation that are still not finalized and are subject to change within the measurement period relate to the valuation of certain intangible assets, income taxes and the resulting goodwill.

Actual results of operations of this acquisition are included in our condensed consolidated financial statements from the effective date of the acquisition. This acquisition is not material, and therefore supplemental pro forma information is not presented for the quarters ended March 31, 2012 and 2011.

2011 Acquisitions

BakBone Software Incorporated – In January 2011, we acquired 100 percent of the voting equity interest of BakBone Software Incorporated ("BakBone"), a publicly-held provider of data protection software, for cash consideration of approximately $56 million. BakBone provides us with additional technologies and products to provide data protection solutions across heterogeneous physical, virtual and application-level environments.

The acquisition has been accounted for as a business combination and the purchase price was allocated primarily to goodwill and other intangible assets. Actual results of operations of BakBone are included in our consolidated financial statements from the date of acquisition. Our final allocation of the purchase price to assets and liabilities based upon fair value determinations was as follows (in thousands):

Current assets	$	12,479
Acquired technologies with a weighted average useful life of 5.2 years		24,500
In-process research and development		400
Customer relationships with a useful life of 4.0 years		11,300
Trademarks and trade names with a useful life of 10.0 years		1,800
Goodwill		18,690
Deferred income tax assets – non-current		9,872
Other non-current assets		2,419
Current liabilities		(6,328	)
Deferred revenue – current		(9,383	)
Deferred revenue – non-current		(9,491	)
Other long-term liabilities		(278	)
Total purchase price	$	55,980

The intangible assets will be amortized over the pattern in which the expected economic benefits of the intangible assets are realized, which in general is correlated with the cash flows generated from such assets. We acquired an in-process research and development ("IPR&D") project and the value assigned to the IPR&D was determined utilizing the income approach by determining cash flow projections relating to the project. We applied a discount rate of 28% to derive the value of the IPR&D project. The IPR&D project will be assessed for impairment until completed. Upon completion, the project will be amortized over its estimated useful life, as described above. The goodwill associated with this acquisition is reported within our Licenses, Maintenance Services and Professional Services segments of our business, and is not expected to be deductible for tax purposes. The goodwill allocation of 45% to Licenses, 52% to Maintenance Services and 3% to Professional Services is based on both historical and projected relative contribution from Licenses, Maintenance Services and Professional Services revenues. Goodwill results from expected synergies from the transaction, including complementary products that will enhance our overall product portfolio, and opportunities within new markets, which we believe will result in incremental revenue and profitability.

This acquisition is not material, and therefore supplemental pro forma information is not presented for the quarter ended March 31, 2011.

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Stock-Based Compensation (Classification Of Stock-Based Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 6,083		$ 7,413
Tax benefit associated with stock-based compensation expense	2,385	[1]	2,869	[1]
Reduction of net income	3,698		4,544
Recognized tax benefit related to share-based compensation expense	39.20%		38.70%
Cost Of Services [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	232		316
Sales And Marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	1,728		2,109
Research And Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	1,497		2,152
General And Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation	$ 2,628		$ 2,836

[1] The recognized tax benefit related to stock-based compensation expense was estimated to be 39.2% and 38.7% for the quarter ended March 31, 2012 and 2011, respectively. This approximates the blended Federal and State statutory tax rate after the benefit for state taxes.

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Geographic And Segment Reporting (Reportable Segment Data) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 212,196	$ 188,157
Cost of revenues	33,853	27,399
Gross profit	178,343	160,758
Licenses [Member]
Segment Reporting Information [Line Items]
Revenues	69,983	66,735
Cost of revenues	9,851	6,434
Gross profit	60,132	60,301
Maintenance Services [Member]
Segment Reporting Information [Line Items]
Revenues	126,820	108,066
Cost of revenues	11,820	10,011
Gross profit	115,000	98,055
Professional Services [Member]
Segment Reporting Information [Line Items]
Revenues	15,393	13,356
Cost of revenues	12,182	10,954
Gross profit	$ 3,211	$ 2,402

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Property And Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2012

Property And Equipment, Net [Abstract]

Net Property And Equipment

	March 31			December 31
	2012			2011
Building	$	39,273		$	39,297
Furniture and fixtures		17,324			17,249
Machinery and equipment		9,425			9,163
Computer equipment		65,180			65,331
Computer software		52,648			51,541
Leasehold improvements		18,765			18,615
Land		16,317			16,317
Construction in progress – building		10,458			6,427
		229,390			223,940
Less accumulated depreciation and amortization		(131,853	)		(129,338	)
Property and equipment, net	$	97,537		$	94,602

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Cash And Cash Equivalents And Investments (Tables)

3 Months Ended

Mar. 31, 2012

Cash And Cash Equivalents And Investments [Abstract]

Summary Of Cash And Cash Equivalents And Investments By Balance Sheet Classification

	March 31, 2012				December 31, 2011
	Amortized Cost		Fair Value (1)		Amortized Cost		Fair Value (1)
Cash and cash equivalents	$	220,006	$	220,006	$	192,165	$	192,165
Short-term investments		43,115		43,194		36,688		36,774
Long-term investments		19,014		19,166		24,964		24,832
Total cash and cash equivalents and investments	$	282,135	$	282,366	$	253,817	$	253,771

(1) See Note 16 – Fair Value Measurements for details regarding fair value measurements.

Summary Of Investments By Investment Category

	March 31, 2012
Investment category:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
US treasury securities	$	9,496	$	—	$	(1	)	$	9,495
US agency securities		3,515		17		—			3,532
Corporate notes/bonds		47,397		231		(16	)		47,612
Certificates/term deposits		1,721		—		—			1,721
Total investments	$	62,129	$	248	$	(17	)	$	62,360
	December 31, 2011
Investment category:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
US treasury securities	$	6,920	$	1	$	—		$	6,921
US agency securities		5,526		25		—			5,551
Corporate notes/bonds		47,600		124		(196	)		47,528
Certificates/term deposits		1,606		—		—			1,606
Total investments	$	61,652	$	150	$	(196	)	$	61,606

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Net Income Per Share Attributable To Quest Software Inc. Stockholders (Reconciliation Of Denominator Of Net Income Per Share Attributable To Quest Software, Inc. Stockholders) (Details)	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Net Income Per Share Attributable To Quest Software Inc. Stockholders [Abstract]
Shares used in computing basic net income per share	83,424,000		92,303,000
Dilutive effect of stock options and restricted stock units	1,678,000	[1]	2,809,000	[1]
Shares used in computing diluted net income per share	85,102,000		95,112,000
Common stock outstanding not included in computation of diluted net income per share	4,900,000		1,300,000

[1] Options to purchase 4.9 million and 1.3 million shares of common stock were outstanding during the three months ended March 31, 2012 and 2011, respectively, but were not included in the computation of diluted net income per share as inclusion would have been anti-dilutive.

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Geographic And Segment Reporting (Schedule Of Geographical Segment Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 212,196		$ 188,157
Long-lived assets	154,779	[1]	118,012	[1]
United States [Member]
Segment Reporting Information [Line Items]
Revenues	123,971		112,747
Long-lived assets	122,580	[1]	103,637	[1]
Ireland [Member]
Segment Reporting Information [Line Items]
Revenues	39,739		30,964
Long-lived assets	17,506	[1]	263	[1]
Other International [Member]
Segment Reporting Information [Line Items]
Revenues	48,486	[2]	44,446	[2]
Long-lived assets	$ 14,693	[1],[2]	$ 14,112	[1],[2]
Maximum rate of total revenues	10.00%

[1] Includes property and equipment, net and other assets

[2] No single location within Other International accounts for greater than 10% of total revenues

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Goodwill And Intangible Assets, Net (Tables)

3 Months Ended

Mar. 31, 2012

Goodwill And Intangible Assets, Net [Abstract]

Changes In Carrying Amount Of Goodwill

	Licenses			Maintenance Services			Professional Services			Total
Balance as of December 31, 2011	$	542,243		$	307,881		$	8,320		$	858,444
Acquisitions		—			3,817			—			3,817
Adjustments		(59	)		(94	)		(5	)		(158	)
Balance as of March 31, 2012	$	542,184		$	311,604		$	8,315		$	862,103

Components Of Intangible Assets, Net

	March 31, 2012							December 31, 2011
	Gross Carrying Amount		Accumulated Amortization and Impairments			Net		Gross Carrying Amount		Accumulated Amortization and Impairments			Net
Acquired technology and IPR&D (1)	$	247,654	$	(165,042	)	$	82,612	$	244,680	$	(157,944	)	$	86,736
Customer relationships		124,018		(75,126	)		48,892		122,918		(67,193	)		55,725
Non-compete agreements		15,268		(14,058	)		1,210		15,068		(13,896	)		1,172
Trademarks and trade names (2)		19,596		(13,043	)		6,553		19,596		(12,843	)		6,753
	$	406,536	$	(267,269	)	$	139,267	$	402,262	$	(251,876	)	$	150,386

(1) IPR&D projects were identified and valued related to our acquisitions. These projects are continually assessed for impairment. Upon completion, these projects will be amortized over their estimated useful life.

(2) Trademarks and trade names include $0.8 million in trade names related to our acquisition of PacketTrap that have an indefinite useful life, and as such are not being amortized.

Estimated Annual Amortization Expense Related To Amortizing Intangible Assets

	Estimated Annual Amortization Expense
2012 (remaining 3 quarters)	$	31,116
2013		29,872
2014		27,295
2015		18,691
2016 and thereafter		31,493
Total accumulated amortization	$	138,467

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Other (Expense) Income, Net (Tables)

3 Months Ended

Mar. 31, 2012

Other (Expense) Income, Net [Abstract]

Schedule Of Other (Expense) Income, Net

	Three Months Ended March 31
	2012			2011
Interest income	$	525		$	537
Interest expense		(1,131	)		(980	)
Foreign currency gains, net (1)		1,557			3,103
Foreign currency contracts losses, net (2)		(1,743	)		(1,613	)
Other (expense) income		(82	)		109
Total other (expense) income, net	$	(874	)	$	1,156

(1) Our foreign currency gains, net are predominantly attributable to the re-measurement gains or losses on our net balances of monetary assets and liabilities in our foreign subsidiaries which were primarily denominated in the Euro, and to a lesser extent, the British Pound and Canadian Dollar. The foreign currency re-measurement adjustments to these balance sheet items are calculated by comparing the currency spot rates at the end of a month to the spot rates at the end of the previous month.

(2) Relates to changes in fair value of our forward foreign currency contracts not designated as hedging instruments. See Note 15 — Derivative Instruments for further details.

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Recent Accounting Pronouncements

3 Months Ended

Mar. 31, 2012

Recent Accounting Pronouncements [Abstract]

Recent Accounting Pronouncements

NOTE 2 — RECENT ACCOUNTING PRONOUNCEMENTS

In May 2011, the Financial Accounting Standards Board ("FASB") issued amendments to its accounting guidance on fair value measurement. The amendments provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. The amendments change certain fair value measurement principles and enhance the disclosure requirements about fair value measurements. This guidance is effective during interim and annual periods beginning after December 15, 2011 and should be applied prospectively. There was no material impact from our adoption of this guidance to our consolidated financial statements.

In June 2011, the FASB issued amendments to its accounting guidance on comprehensive income. The amendments require an entity to present the total of comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The amendments eliminate the option to present the components of other comprehensive income as part of the statement of equity. This guidance is effective for fiscal years, and interim periods within those years, beginning after December 15, 2011. We have presented separate consolidated statements of comprehensive income consecutively after the consolidated income statements upon adoption of this guidance. In December 2011, the FASB issued amendments to defer the presentation on the face of the financial statements the reclassification adjustments out of accumulated other comprehensive income on the components of net income and other comprehensive income for all periods presented.

In September 2011, the FASB issued amendments to its accounting guidance on testing goodwill for impairment. The amendments allow entities to use a qualitative approach to test goodwill for impairment. This permits an entity to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If it is concluded that it is more likely than not that the fair value of a reporting unit is less than its carrying value, it is necessary to perform the currently prescribed two-step goodwill impairment test. Otherwise, the two-step goodwill impairment test is not required. This guidance is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. There was no impact from our adoption of this guidance to our consolidated financial statements.

In December 2011, the FASB issued amendments to disclosures about offsetting assets and liabilities. The amendments require the disclosure of both gross information and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. This scope would include derivatives, sale and repurchase agreements and reverse sale and repurchase agreements, and securities borrowing and securities lending arrangements. This guidance is effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. The disclosures required by the amendments should be provided retrospectively for all comparative periods presented. We do not anticipate any impact from our adoption of this guidance to our consolidated financial statements as these amendments only refer to enhanced disclosures.

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Net Income Per Share Attributable To Quest Software Inc. Stockholders (Tables)

3 Months Ended

Mar. 31, 2012

Net Income Per Share Attributable To Quest Software Inc. Stockholders [Abstract]

Reconciliation Of Denominator Of Net Income Per Share Attributable To Quest Software, Inc. Stockholders

	Three Months Ended March  31
	2012		2011
Shares used in computing basic net income per share		83,424		92,303
Dilutive effect of stock options and restricted stock units (1)		1,678		2,809
Shares used in computing diluted net income per share		85,102		95,112

(1) Options to purchase 4.9 million and 1.3 million shares of common stock were outstanding during the three months ended March 31, 2012 and 2011, respectively, but were not included in the computation of diluted net income per share as inclusion would have been anti-dilutive.

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Organization, Proposed Merger And Bases Of Presentation (Impact Of Tax Correction To The Consolidated Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income	$ 2,601	$ 3,371
Unrealized foreign currency gains, net	(3,429)	(3,346)
Deferred income taxes	406	(221)
Income taxes payable	(7,682)	(692)
Net cash provided by operating activities	52,248	69,644
As Adjusted [Member]
Net income		3,629	[1]
Unrealized foreign currency gains, net		(3,459)	[1]
Deferred income taxes		(142)	[1]
Income taxes payable		(916)	[1]
Net cash provided by operating activities		69,644	[1]
As Corrected [Member]
Net income		3,371
Unrealized foreign currency gains, net		(3,346)
Deferred income taxes		(221)
Income taxes payable		(692)
Net cash provided by operating activities		69,644
Increase/(Decrease) [Member]
Net income		(258)
Unrealized foreign currency gains, net		113
Deferred income taxes		(79)
Income taxes payable		$ 224

[1] Refer to the above section "Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods".

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Loans Payable (Details) (USD $)	1 Months Ended
	Feb. 28, 2011 Y	Aug. 31, 2009 Y	Mar. 31, 2012	Dec. 31, 2011
Line of Credit Facility [Line Items]
Revolving credit facility, term (years)	5
Revolving credit facility, maximum borrowing capacity	$ 100,000,000
Credit Agreement potential floating interest rate plus Federal Funds Rate	0.50%
Margin increase on Wells Fargo's prime rate			1.50%
Revolving credit facility, fees	500,000
Revolving credit facility, amount outstanding			71,000,000
Loan, principal amount outstanding		34,000,000
Loan, fixed interest rate		7.03%
Loan maturity period		5
Loan, amortization period (years)		25
Increase in interest rate due to default in repayment		5.00%
Loan, outstanding balance			104,142,000
Current portion of loans payable, Book Value			71,614,000	91,597,000
Long-term portion of loans payable, Book Value			32,528,000	32,133,000
Mutual Of Omaha Bank [Member]
Line of Credit Facility [Line Items]
Loan, outstanding balance			32,600,000
Current portion of loans payable, Book Value			600,000
Long-term portion of loans payable, Book Value			$ 32,000,000

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 220,006		$ 192,165
Short-term investments	43,194	[1]	36,774	[1]
Accounts receivable, net of allowances of $4,385 and $6,369 at March 31, 2012 and December 31, 2011, respectively	137,100		201,636
Prepaid expenses and other current assets	55,389		45,846
Deferred income taxes, net	21,388		21,647
Total current assets	477,077		498,068
Property and equipment, net	97,537		94,602
Long-term investments	19,166	[1]	24,832	[1]
Intangible assets, net	139,267		150,386
Goodwill	862,103		858,444
Deferred income taxes, net	20,891		17,559
Other assets	57,242		55,627
Total assets	1,673,283		1,699,518
LIABILITIES AND EQUITY
Accounts payable	11,666		11,723
Accrued compensation	50,020		56,148
Other accrued expenses	41,379		42,845
Income taxes payable	14,654		14,482
Loans payable	71,614		91,597
Deferred revenue	368,884		388,788
Total current liabilities	558,217		605,583
Long-term liabilities:
Deferred revenue	110,341		111,050
Income taxes payable	51,276		51,276
Loans payable	32,528		32,133
Other long-term liabilities	7,666		9,942
Total long-term liabilities	201,811		204,401
Total liabilities	760,028		809,984
Commitments and contingencies (Note 17)
Redeemable noncontrolling interest	22,000		22,000
Quest Software, Inc. stockholders' equity:
Preferred stock, $0.001 par value, 10,000 shares authorized; no shares issued or outstanding
Common stock, $0.001 par value, 200,000 shares authorized; 84,066 and 83,148 shares issued and outstanding at March 31, 2012 and December 31, 2011, respectively	84		83
Additional paid-in-capital	541,811		521,653
Retained earnings	335,725		333,057
Accumulated other comprehensive income (loss)	753		(208)
Total Quest Software Inc. stockholders' equity	878,373		854,585
Noncontrolling interest	12,882		12,949
Total equity	891,255		867,534
Total liabilities and equity	$ 1,673,283		$ 1,699,518

[1] See Note 16 - Fair Value Measurements for details regarding fair value measurements.

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Cash And Cash Equivalents And Investments (Summary Of Cash And Cash Equivalents And Investments By Balance Sheet Classification) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Cash And Cash Equivalents And Investments [Abstract]
Cash and cash equivalents, Amortized Cost	$ 220,006		$ 192,165
Cash and cash equivalents, Fair Value	220,006	[1]	192,165	[1]
Short-term investments, Amortized Cost	43,115		36,688
Short-term investments, Fair Value	43,194	[1]	36,774	[1]
Long-term investments, Amortized Cost	19,014		24,964
Long-term investments, Fair Value	19,166	[1]	24,832	[1]
Total cash and cash equivalents and investments, Amortized Cost	282,135		253,817
Total cash and cash equivalents and investments, Fair Value	$ 282,366	[1]	$ 253,771	[1]

[1] See Note 16 - Fair Value Measurements for details regarding fair value measurements.

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Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 2,601	$ 3,371
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,751	12,429
Compensation expense associated with stock-based payments	6,083	7,413
Impairment losses on intangible assets	3,365
Unrealized foreign currency gains, net	(3,429)	(3,346)
Deferred income taxes	406	(221)
Excess tax benefit related to stock-based compensation	(266)	(1,481)
Other non-cash adjustments, net	301	567
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	65,929	61,594
Prepaid expenses and other current assets	(2,500)	3,044
Other assets	(132)	1,744
Accounts payable	2,280	786
Accrued compensation	(6,883)	(10,722)
Other accrued expenses	(385)	1,998
Income taxes payable	(7,682)	(692)
Deferred revenue	(20,614)	(4,792)
Other liabilities	(2,577)	(2,048)
Net cash provided by operating activities	52,248	69,644
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired	(7,566)	(70,724)
Purchases of property and equipment	(8,129)	(4,427)
Change in restricted cash	937	(11,331)
Purchases of cost method investments	(2,106)	(20,203)
Purchases of investment securities	(6,007)	(4,067)
Sales and maturities of investment securities	5,477	29,061
Contributions on equity method investment	(1,926)
Change in notes receivable	(90)	(350)
Net cash used in investing activities	(19,410)	(82,041)
Cash flows from financing activities:
Proceeds from loans payable	561
Repayment of loans payable	(20,148)	(103)
Repurchase of common stock		(84,359)
Repayment of capital lease obligations	(131)	(25)
Cash paid for line of credit fees		(500)
Proceeds from the exercise of stock options	14,751	20,248
Excess tax benefit related to stock-based compensation	266	1,481
Net cash used in financing activities	(4,701)	(63,258)
Effect of exchange rate changes on cash and cash equivalents	(296)	4,537
Net increase (decrease) in cash and cash equivalents	27,841	(71,118)
Cash and cash equivalents, beginning of period	192,165	356,533
Cash and cash equivalents, end of period	220,006	285,415
Supplemental disclosures of consolidated cash flow information:
Cash paid for interest	911	782
Cash paid for income taxes	$ 8,742	$ 721

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Stock-Based Compensation (Weighted-Average Assumptions For Option Awards Granted) (Details) (Employee Stock Options [Member])	3 Months Ended
	Mar. 31, 2012 Y	Mar. 31, 2011 Y
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	36.00%	34.00%
Expected term (in years)	5.7	5.7
Risk-free interest rate	1.00%	2.10%
Expected dividend yield

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Summary Of Fair Value Of Financial Assets And Liabilities Measured At Recurring Basis And Valuation Techniques

	March 31, 2012
	Total		Level 1		Level 2		Level 3		Valuation Techniques
Assets:
Money market funds	$	104,249	$	104,249	$	—	$	—		(a	)
U.S. treasury securities		9,496		9,496		—		—		(a	)
U.S. agency securities		3,532		3,532		—		—		(a	)
Corporate notes/bonds		47,612		—		47,612		—		(a	)
Certificates/term deposits		3,042		—		3,042		—		(a	)
Derivative assets (1)		1,392		—		1,392		—		(a	)
Total	$	169,323	$	117,277	$	52,046	$	—
Liabilities:
Derivative liabilities (1)	$	236	$	—	$	236	$	—		(a	)
Contingent consideration		2,755		—		—		2,755		(b	)
Total	$	2,991	$	—	$	236	$	2,755

	December 31, 2011
	Total		Level 1		Level 2		Level 3		Valuation Techniques
Assets:
Money market funds	$	65,811	$	65,811	$	—	$	—		(a	)
U.S. treasury securities		6,921		3,499		3,422		—		(a	)
U.S. agency securities		5,551		3,545		2,006		—		(a	)
Corporate notes/bonds		47,528		—		47,528		—		(a	)
Certificates/term deposits		2,922		—		2,922		—		(a	)
Derivative assets (1)		2,863		—		2,863		—		(a	)
Total	$	131,596	$	72,855	$	58,741	$	—
Liabilities:
Derivative liabilities (1)	$	300	$	—	$	300	$	—		(a	)
Contingent consideration		3,782		—		—		3,782		(b	)
Total	$	4,082	$	—	$	300	$	3,782

(1) See Note 15 – Derivative Instruments for details.

Summary Of Liabilities Measured At Fair Value On Recurring Basis Using Significant Unobservable Inputs (Level 3)

	Three Months Ended March 31
	2012			2011
Total, beginning of the period	$	3,782		$	8,515
Contingent consideration		—			3,300
Change in fair value of contingent consideration		(27	)		—
Payment of contingent consideration		(1,000	)		(2,088	)
Total, end of the period	$	2,755		$	9,727

Summary Of Book Value And Fair Value Of Current And Long-Term Portion Of Loans Payable

	Book Value		Fair Value (1)
Current portion of loans payable	$	71,614	$	71,614
Long-term portion of loans payable		32,528		32,528
	$	104,142	$	104,142

(1) Estimated fair value of long-term debt is measured using the income approach. This fair value measurement is based on similar grade US Treasury security re-priced at March 31, 2012 plus contractual spread and thus represents Level 2 inputs under the fair value hierarchy.

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Derivative Instruments (Effect Of Derivative Instruments Designated As Hedges On AOCI) (Details) (Foreign Currency Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in AOCI (effective portion)	$ 709	$ (407)
Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (loss) gain reclassified from accumulated AOCI (effective portion)	(118)	(1,030)
Operating Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (loss) gain reclassified from accumulated AOCI (effective portion)	$ 340	$ 500

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Fair Value Measurements

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Fair Value Measurements

NOTE 16 — FAIR VALUE MEASUREMENTS

We perform fair value measurements in accordance with FASB's guidance on Fair Value Measurements and Disclosures. This standard defines fair value, provides guidance for measuring fair value and requires certain disclosures. This standard does not require any new fair value measurements, but rather applies under other accounting pronouncements that require or permit fair value measurements. The standard discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow) and the cost approach (cost to replace the service capacity of an asset or replacement cost). The statement establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels:

• Level 1: Observable inputs such as quoted prices (unadjusted) in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.

• Level 2: Inputs other than quoted prices that are observable for the asset or liability, either directly or indirectly. These include quoted prices for similar assets or liabilities in active markets and quoted prices for identical or similar assets or liabilities in markets that are not active.

• Level 3: Unobservable inputs that reflect the reporting entity's own assumptions when there is little or no market data.

We measure our financial assets and liabilities at fair value on a recurring basis using the following valuation techniques:

(a) Market Approach – uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

(b) Income Approach – uses valuation techniques to convert future estimated cash flows to a single present amount based on current market expectations about those future amounts, using present value techniques.

The following table represents our fair value hierarchy and the valuation techniques used for financial assets and financial liabilities measured at fair value on a recurring basis (in thousands):

	March 31, 2012
	Total		Level 1		Level 2		Level 3		Valuation Techniques
Assets:
Money market funds	$	104,249	$	104,249	$	—	$	—		(a	)
U.S. treasury securities		9,496		9,496		—		—		(a	)
U.S. agency securities		3,532		3,532		—		—		(a	)
Corporate notes/bonds		47,612		—		47,612		—		(a	)
Certificates/term deposits		3,042		—		3,042		—		(a	)
Derivative assets (1)		1,392		—		1,392		—		(a	)
Total	$	169,323	$	117,277	$	52,046	$	—
Liabilities:
Derivative liabilities (1)	$	236	$	—	$	236	$	—		(a	)
Contingent consideration		2,755		—		—		2,755		(b	)
Total	$	2,991	$	—	$	236	$	2,755

	December 31, 2011
	Total		Level 1		Level 2		Level 3		Valuation Techniques
Assets:
Money market funds	$	65,811	$	65,811	$	—	$	—		(a	)
U.S. treasury securities		6,921		3,499		3,422		—		(a	)
U.S. agency securities		5,551		3,545		2,006		—		(a	)
Corporate notes/bonds		47,528		—		47,528		—		(a	)
Certificates/term deposits		2,922		—		2,922		—		(a	)
Derivative assets (1)		2,863		—		2,863		—		(a	)
Total	$	131,596	$	72,855	$	58,741	$	—
Liabilities:
Derivative liabilities (1)	$	300	$	—	$	300	$	—		(a	)
Contingent consideration		3,782		—		—		3,782		(b	)
Total	$	4,082	$	—	$	300	$	3,782

(1) See Note 15 – Derivative Instruments for details.

We classify our investments in U.S. Treasury and U.S. Agency securities using a market approach based on the quoted market prices of identical or similar instruments. A determination of the fair value classification of U.S. Treasury and U.S. Agency securities will be made on a case by case basis based on recent buy or sell activity. As of March 31, 2012, the fair values of our U.S. Treasury and U.S. Agency securities are based on unadjusted market prices in active markets and are classified as Level 1 of the fair value hierarchy.

We determine the amount of transfers between Levels 1 and 2 or transfers into or out of Level 3 by using the end-of-period fair value. We had no transfers among the fair value hierarchy during the three months ended March 31, 2012.

The following table presents our liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2012 and 2011 (in thousands)

	Three Months Ended March 31
	2012			2011
Total, beginning of the period	$	3,782		$	8,515
Contingent consideration		—			3,300
Change in fair value of contingent consideration		(27	)		—
Payment of contingent consideration		(1,000	)		(2,088	)
Total, end of the period	$	2,755		$	9,727

 

We enter into earn-out agreements with the shareholders of certain companies we acquire. The earn-out contingent payments are typically determined based on achieving certain sales or revenue targets over a specified period after the acquisition date. This also includes contingent consideration relating to our purchase of intellectual property whereby the former owner has the opportunity to earn an additional amount contingent upon achievement of certain technology milestones. The fair value of the contingent consideration was determined using the income approach based on our expectations of achieving the sales and revenue targets and technology milestones which are significant inputs that are not observable in the market and thus represents Level 3 inputs under the fair value hierarchy. A key assumption used in determining the contingent payment obligation for those earn out contingencies tied to sales or revenue targets is a discount rate consistent with our estimated pre-tax cost of debt. We do not expect that a change in the discount rate will result in a significantly higher or lower fair value measurement.

Other Financial Assets and Liabilities

The carrying amounts of our other financial assets and liabilities including accounts receivable, accounts payable and accrued liabilities approximate their respective fair values because of the relatively short period of time between their origination and their expected realization.

The book value and fair value of our current and long-term portion of loans payable as of March 31, 2012 are as follows (in thousands):

	Book Value		Fair Value (1)
Current portion of loans payable	$	71,614	$	71,614
Long-term portion of loans payable		32,528		32,528
	$	104,142	$	104,142

(1) Estimated fair value of long-term debt is measured using the income approach. This fair value measurement is based on similar grade US Treasury security re-priced at March 31, 2012 plus contractual spread and thus represents Level 2 inputs under the fair value hierarchy.

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Organization, Proposed Merger And Bases Of Presentation (Narrative) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 27, 2012	Mar. 31, 2012
Organization, Proposed Merger And Bases Of Presentation [Abstract]
Cumulative liability including income tax, interest and penalties		$ 14.5
Voluntary payment of outstanding taxes to Australian Tax Office ("ATO")	$ 6.5

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Organization, Proposed Merger And Bases Of Presentation (Policy)

3 Months Ended

Mar. 31, 2012

Organization, Proposed Merger And Bases Of Presentation [Abstract]

Pending Proposed Merger Transaction

Pending Proposed Merger Transaction

On March 8, 2012, the Company entered into an Agreement and Plan of Merger (the "Merger Agreement") with Expedition Holding Company, Inc., a Delaware corporation ("Parent"), and Expedition Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent, pursuant to which Parent will acquire, subject to certain exceptions, all of the outstanding shares of the Company's common stock for a purchase price of $23.00 per share in cash. Parent and Merger Sub are beneficially owned by funds affiliated with Insight Venture Management, LLC, a Delaware limited liability company ("Insight").

For terms of the Merger Agreement, including circumstances under which the Merger Agreement can be terminated and the ramifications of such a termination, as well as other terms and conditions, refer to the Merger Agreement filed as Exhibit 2.1 to our Current Report on Form 8-K with the Securities and Exchange Commission on March 9, 2012.

The merger is currently expected to close in the third quarter of this year, and is subject to customary closing conditions as well as approval and adoption of the Merger Agreement by the Company's stockholders (including approval by a majority of the outstanding unaffiliated shares of common stock, which excludes any shares of common stock held by Parent, Merger Sub and Vincent Smith, President, Chief Executive Officer and Chairman of the Board, and certain related trusts). If completed, the merger will result in the Company becoming a privately-held company, and its shares of common stock will no longer be listed on any public market. No assurance can be given that the merger will be completed.

Impact Of Change In Consolidated Statement Of Cash Flows Presentation To Prior Periods

Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods

We maintain positions in certain foreign currencies which may at times create unrealized gains or losses. Unrealized foreign currency gains/losses should be presented as an adjustment to reconcile net income to net cash provided by operating activities in our consolidated statement of cash flows. Effective during the third quarter of 2011, we presented such unrealized foreign currency gains/losses in our consolidated statement of cash flows. This change impacts our cash flow presentation and does not impact earnings or cash balances. Management has concluded that this change of presentation is not material to any periods affected. The following represents the details of the impact to our previously reported consolidated statement of cash flows to conform to the current year presentation (in thousands):

	Three Months Ended March 31, 2011
	As  Previously Reported		As Adjusted		Impact
Unrealized foreign currency gains, net	$	—	$	(3,459)	$	(3,459	)
Changes in operating assets and liabilities, net of effects of acquisitions		48,912		50,688		1,776
Net cash provided by operating activities		71,327		69,644		(1,683	)
Effect of exchange rate changes in cash and cash equivalents		2,854		4,537		1,683
Net impact						—

Correction Of A Tax Error Related To Prior Periods

Correction of a Tax Error Related to Prior Periods

During March 2012, we discovered an error in the historical Australian income tax returns of our wholly-owned subsidiary, Quest Software Pty. Ltd., related to an incorrectly claimed research and development benefit that resulted in a cumulative liability including income tax, interest and penalties of $14.5 million. The error impacts multiple prior periods back to the year ended December 31, 1999. We have concluded that this error has not caused a material misstatement within any previously issued consolidated financial statement for any period. However, if the cumulative effect of the income taxes, interest and penalties were to be included solely within the first quarter of 2012, it would be material to that quarter's results. Thus, after considering Staff Accounting Bulletin Release No. 108, "Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements", we have corrected the Consolidated Financial Statements for the fiscal years ended December 31, 2011, 2010, and 2009 in our Current Report on Form 8-K filed on May 10, 2012, which prior to the corrections were filed previously with Quest's Annual Report on Form 10-K for the period ended December 31, 2011.

In connection with this tax correction, we have presented in this Form 10-Q the corrected consolidated balance sheet as of December 31, 2011, the corrected consolidated income statement for the three months ended March 31, 2011 and the corrected consolidated statement of cash flows for the three months ended March 31, 2011. The following represents the impact of the tax correction to our previously reported consolidated financial statements (in thousands, except per share data):

Corrected Consolidated Balance Sheet:

	December 31, 2011
	As  Previously Reported		As Corrected		Increase/ (Decrease)
Deferred income taxes, net – current	$	19,780	$	21,647	$	1,867
Total current assets		496,201		498,068		1,867
Total assets		1,697,651		1,699,518		1,867
Income taxes payable – current		—		14,482		14,482
Total current liabilities		591,101		605,583		14,482
Total liabilities		795,502		809,984		14,482
Retained earnings		345,672		333,057		(12,615	)
Total Quest Software Inc. stockholders' equity		867,200		854,585		(12,615	)
Total equity		880,149		867,534		(12,615	)
Total liabilities and equity		1,697,651		1,699,518		1,867

Corrected Consolidated Income Statement:

	Three Months Ended March 31, 2011
	As  Previously Reported		As Corrected		Increase/ (Decrease)
Other income, net	$	1,269	$	1,156	$	(113	)
Income before income tax provision		6,635		6,522		(113	)
Income tax provision		3,006		3,151		145
Net income		3,629		3,371		(258	)
Net income attributable to Quest Software, Inc.		3,629		3,371		(258	)
Net income per share:
Basic	$	0.04	$	0.04	$	—
Diluted	$	0.04	$	0.04	$	—

Corrected Consolidated Statement of Cash Flows:

	Three Months Ended March 31, 2011
	As Adjusted  (1)			As Corrected			Increase/ (Decrease)
Net income	$	3,629		$	3,371		$	(258	)
Unrealized foreign currency gains, net		(3,459	)		(3,346	)		113
Changes in operating assets and liabilities:
Deferred income taxes		(142	)		(221	)		(79	)
Income taxes payable		(916	)		(692	)		224
Net cash provided by operating activities		69,644			69,644		$	—

(1) Refer to the above section "Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods".

On April 27, 2012, Quest Software Pty. Ltd., filed a voluntary disclosure request with the Australian Tax Office ("ATO") and paid all outstanding taxes due for all impacted tax years which amounted to $6.5 million. Further discussions with the ATO will focus on negotiating interest and penalty amounts to be remitted as a result of the understated taxes.

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Fair Value Measurements (Summary Of Liabilities Measured At Fair Value On Recurring Basis Using Significant Unobservable Inputs (Level 3)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Fair Value Measurements [Abstract]
Total, beginning of the period	$ 3,782	$ 8,515
Contingent consideration		3,300
Change in fair value of contingent consideration	(27)
Payment of contingent consideration	(1,000)	(2,088)
Total, end of the period	$ 2,755	$ 9,727

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Organization, Proposed Merger And Bases Of Presentation

3 Months Ended

Mar. 31, 2012

Organization, Proposed Merger And Bases Of Presentation [Abstract]

Organization, Proposed Merger And Bases Of Presentation

NOTE 1 — ORGANIZATION, PROPOSED MERGER AND BASES OF PRESENTATION

Quest Software, Inc. was incorporated in California in 1987 and reincorporated in Delaware in 2009. We are a leading developer and vendor of Database Management, Performance Monitoring, Data Protection, User Workspace Management, Windows Server Management, and Identity and Access Management software products. We also provide consulting, training, and support services to our customers. References to "Quest," "Quest Software," the "Company," "we," "us," or "our" refer to Quest Software, Inc. and its consolidated subsidiaries.

Our accompanying unaudited condensed consolidated financial statements as of March 31, 2012 and for the three months ended March 31, 2012 and 2011 reflect all adjustments (consisting of normal recurring accruals) that, in the opinion of management, are necessary for a fair presentation of the results for the interim periods presented. These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.

The information included in this Quarterly Report on Form 10-Q should be read in conjunction with "Management's Discussion and Analysis of Financial Condition and Results of Operations," and "Quantitative and Qualitative Disclosures About Market Risk" included in Quest's Annual Report on Form 10-K for the year ended December 31, 2011 ("2011 Form 10-K"), and the "Corrected Consolidated Financial Statements and Notes to the Consolidated Financial Statements" included in our Current Report on Form 8-K filed on May 10, 2012. The results for the interim periods presented are not necessarily indicative of the results that may be expected for any future period

Pending Proposed Merger Transaction

On March 8, 2012, the Company entered into an Agreement and Plan of Merger (the "Merger Agreement") with Expedition Holding Company, Inc., a Delaware corporation ("Parent"), and Expedition Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent, pursuant to which Parent will acquire, subject to certain exceptions, all of the outstanding shares of the Company's common stock for a purchase price of $23.00 per share in cash. Parent and Merger Sub are beneficially owned by funds affiliated with Insight Venture Management, LLC, a Delaware limited liability company ("Insight").

For terms of the Merger Agreement, including circumstances under which the Merger Agreement can be terminated and the ramifications of such a termination, as well as other terms and conditions, refer to the Merger Agreement filed as Exhibit 2.1 to our Current Report on Form 8-K with the Securities and Exchange Commission on March 9, 2012.

The merger is currently expected to close in the third quarter of this year, and is subject to customary closing conditions as well as approval and adoption of the Merger Agreement by the Company's stockholders (including approval by a majority of the outstanding unaffiliated shares of common stock, which excludes any shares of common stock held by Parent, Merger Sub and Vincent Smith, President, Chief Executive Officer and Chairman of the Board, and certain related trusts). If completed, the merger will result in the Company becoming a privately-held company, and its shares of common stock will no longer be listed on any public market. No assurance can be given that the merger will be completed.

Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods

We maintain positions in certain foreign currencies which may at times create unrealized gains or losses. Unrealized foreign currency gains/losses should be presented as an adjustment to reconcile net income to net cash provided by operating activities in our consolidated statement of cash flows. Effective during the third quarter of 2011, we presented such unrealized foreign currency gains/losses in our consolidated statement of cash flows. This change impacts our cash flow presentation and does not impact earnings or cash balances. Management has concluded that this change of presentation is not material to any periods affected. The following represents the details of the impact to our previously reported consolidated statement of cash flows to conform to the current year presentation (in thousands):

	Three Months Ended March 31, 2011
	As  Previously Reported		As Adjusted		Impact
Unrealized foreign currency gains, net	$	—	$	(3,459)	$	(3,459	)
Changes in operating assets and liabilities, net of effects of acquisitions		48,912		50,688		1,776
Net cash provided by operating activities		71,327		69,644		(1,683	)
Effect of exchange rate changes in cash and cash equivalents		2,854		4,537		1,683
Net impact						—

Correction of a Tax Error Related to Prior Periods

During March 2012, we discovered an error in the historical Australian income tax returns of our wholly-owned subsidiary, Quest Software Pty. Ltd., related to an incorrectly claimed research and development benefit that resulted in a cumulative liability including income tax, interest and penalties of $14.5 million. The error impacts multiple prior periods back to the year ended December 31, 1999. We have concluded that this error has not caused a material misstatement within any previously issued consolidated financial statement for any period. However, if the cumulative effect of the income taxes, interest and penalties were to be included solely within the first quarter of 2012, it would be material to that quarter's results. Thus, after considering Staff Accounting Bulletin Release No. 108, "Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements", we have corrected the Consolidated Financial Statements for the fiscal years ended December 31, 2011, 2010, and 2009 in our Current Report on Form 8-K filed on May 10, 2012, which prior to the corrections were filed previously with Quest's Annual Report on Form 10-K for the period ended December 31, 2011.

In connection with this tax correction, we have presented in this Form 10-Q the corrected consolidated balance sheet as of December 31, 2011, the corrected consolidated income statement for the three months ended March 31, 2011 and the corrected consolidated statement of cash flows for the three months ended March 31, 2011. The following represents the impact of the tax correction to our previously reported consolidated financial statements (in thousands, except per share data):

Corrected Consolidated Balance Sheet:

	December 31, 2011
	As  Previously Reported		As Corrected		Increase/ (Decrease)
Deferred income taxes, net – current	$	19,780	$	21,647	$	1,867
Total current assets		496,201		498,068		1,867
Total assets		1,697,651		1,699,518		1,867
Income taxes payable – current		—		14,482		14,482
Total current liabilities		591,101		605,583		14,482
Total liabilities		795,502		809,984		14,482
Retained earnings		345,672		333,057		(12,615	)
Total Quest Software Inc. stockholders' equity		867,200		854,585		(12,615	)
Total equity		880,149		867,534		(12,615	)
Total liabilities and equity		1,697,651		1,699,518		1,867

Corrected Consolidated Income Statement:

	Three Months Ended March 31, 2011
	As  Previously Reported		As Corrected		Increase/ (Decrease)
Other income, net	$	1,269	$	1,156	$	(113	)
Income before income tax provision		6,635		6,522		(113	)
Income tax provision		3,006		3,151		145
Net income		3,629		3,371		(258	)
Net income attributable to Quest Software, Inc.		3,629		3,371		(258	)
Net income per share:
Basic	$	0.04	$	0.04	$	—
Diluted	$	0.04	$	0.04	$	—

Corrected Consolidated Statement of Cash Flows:

	Three Months Ended March 31, 2011
	As Adjusted  (1)			As Corrected			Increase/ (Decrease)
Net income	$	3,629		$	3,371		$	(258	)
Unrealized foreign currency gains, net		(3,459	)		(3,346	)		113
Changes in operating assets and liabilities:
Deferred income taxes		(142	)		(221	)		(79	)
Income taxes payable		(916	)		(692	)		224
Net cash provided by operating activities		69,644			69,644		$	—

(1) Refer to the above section "Impact of Change in Consolidated Statement of Cash Flows Presentation to Prior Periods".

On April 27, 2012, Quest Software Pty. Ltd., filed a voluntary disclosure request with the Australian Tax Office ("ATO") and paid all outstanding taxes due for all impacted tax years which amounted to $6.5 million. Further discussions with the ATO will focus on negotiating interest and penalty amounts to be remitted as a result of the understated taxes.

.

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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowances	$ 4,385	$ 6,369
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	84,066,000	83,148,000
Common stock, shares outstanding	84,066,000	83,148,000

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Income Tax Provision

3 Months Ended

Mar. 31, 2012

Income Tax Provision [Abstract]

Income Tax Provision

NOTE 11 — INCOME TAX PROVISION

During the three months ended March 31, 2012, the provision for income taxes decreased to $1.8 million from $3.2 million compared to the same period in 2011. The effective income tax rate for the three months ended March 31, 2012 and 2011 was approximately 40.6% and 48.3%, respectively. The change in the provision for income taxes and the effective income tax rate is primarily a result of the decrease in the consolidated pre-tax book income and the taxes computed based on a lower ratio of year-to-date foreign losses as compared to the overall consolidated pre-tax book income for which no benefit could be taken and partially offset by discrete items impacting the quarter ended March 31, 2012. Discrete items included an increase in the income tax provision related to the establishment of a valuation allowance against certain Luxembourg deferred tax assets.

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Document And Entity Information	3 Months Ended
	Mar. 31, 2012	May 03, 2012
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Entity Registrant Name	QUEST SOFTWARE INC
Entity Central Index Key	0001088033
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		84,329,361

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Net Income Per Share Attributable To Quest Software Inc. Stockholders

3 Months Ended

Mar. 31, 2012

Net Income Per Share Attributable To Quest Software Inc. Stockholders [Abstract]

Net Income Per Share Attributable To Quest Software Inc. Stockholders

NOTE 12 — NET INCOME PER SHARE ATTRIBUTABLE TO QUEST SOFTWARE INC. STOCKHOLDERS

Basic net income per share is computed by dividing net income attributable to Quest Software Inc. stockholders by the weighted-average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution of securities by including other common stock equivalents, including stock options and restricted stock units, in the weighted–average number of common shares outstanding for a period, if dilutive.

The table below sets forth the reconciliation of the denominator of the net income per share attributable to Quest Software, Inc. stockholders (in thousands):

	Three Months Ended March  31
	2012		2011
Shares used in computing basic net income per share		83,424		92,303
Dilutive effect of stock options and restricted stock units (1)		1,678		2,809
Shares used in computing diluted net income per share		85,102		95,112

(1) Options to purchase 4.9 million and 1.3 million shares of common stock were outstanding during the three months ended March 31, 2012 and 2011, respectively, but were not included in the computation of diluted net income per share as inclusion would have been anti-dilutive.

:

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Condensed Consolidated Income Statements (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Licenses	$ 69,983	$ 66,735
Services	142,213	121,422
Total revenues	212,196	188,157
Cost of revenues:
Licenses	2,883	1,784
Services	24,002	20,965
Amortization of purchased technology	6,968	4,650
Total cost of revenues	33,853	27,399
Gross profit	178,343	160,758
Operating expenses:
Sales and marketing	85,962	81,729
Research and development	46,375	41,723
General and administrative	32,462	28,193
Amortization of other purchased intangible assets	8,291	3,747
Total operating expenses	173,090	155,392
Income from operations	5,253	5,366
Other (expense) income, net	(874)	1,156
Income before income tax provision	4,379	6,522
Income tax provision	1,778	3,151
Net income	2,601	3,371
Net loss attributable to noncontrolling interest	67
Net income attributable to Quest Software, Inc.	$ 2,668	$ 3,371
Net income per share attributable to Quest Software, Inc. stockholders:
Basic	$ 0.03	$ 0.04
Diluted	$ 0.03	$ 0.04
Weighted-average common shares outstanding:
Basic	83,424	92,303
Diluted	85,102	95,112

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Property And Equipment, Net

3 Months Ended

Mar. 31, 2012

Property And Equipment, Net [Abstract]

Property And Equipment, Net

NOTE 6 — PROPERTY AND EQUIPMENT, NET

Net property and equipment consisted of the following (in thousands):

	March 31			December 31
	2012			2011
Building	$	39,273		$	39,297
Furniture and fixtures		17,324			17,249
Machinery and equipment		9,425			9,163
Computer equipment		65,180			65,331
Computer software		52,648			51,541
Leasehold improvements		18,765			18,615
Land		16,317			16,317
Construction in progress – building		10,458			6,427
		229,390			223,940
Less accumulated depreciation and amortization		(131,853	)		(129,338	)
Property and equipment, net	$	97,537		$	94,602

Total depreciation and amortization expense related to property and equipment was $3.7 million and $3.9 million for the three months ended March 31, 2012 and 2011, respectively.

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Cash And Cash Equivalents And Investments

3 Months Ended

Mar. 31, 2012

Cash And Cash Equivalents And Investments [Abstract]

Cash And Cash Equivalents And Investments

NOTE 5 — CASH AND CASH EQUIVALENTS AND INVESTMENTS

The following table summarizes our cash and cash equivalents and investments by balance sheet classification at the dates indicated (in thousands):

	March 31, 2012				December 31, 2011
	Amortized Cost		Fair Value (1)		Amortized Cost		Fair Value (1)
Cash and cash equivalents	$	220,006	$	220,006	$	192,165	$	192,165
Short-term investments		43,115		43,194		36,688		36,774
Long-term investments		19,014		19,166		24,964		24,832
Total cash and cash equivalents and investments	$	282,135	$	282,366	$	253,817	$	253,771

(1) See Note 16 – Fair Value Measurements for details regarding fair value measurements.

The following table summarizes our investments by investment category at the dates indicated (in thousands):

	March 31, 2012
Investment category:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
US treasury securities	$	9,496	$	—	$	(1	)	$	9,495
US agency securities		3,515		17		—			3,532
Corporate notes/bonds		47,397		231		(16	)		47,612
Certificates/term deposits		1,721		—		—			1,721
Total investments	$	62,129	$	248	$	(17	)	$	62,360
	December 31, 2011
Investment category:	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
US treasury securities	$	6,920	$	1	$	—		$	6,921
US agency securities		5,526		25		—			5,551
Corporate notes/bonds		47,600		124		(196	)		47,528
Certificates/term deposits		1,606		—		—			1,606
Total investments	$	61,652	$	150	$	(196	)	$	61,606

The average remaining maturities of the Company's short-term and long-term available-for-sale investments at March 31, 2012 were approximately 5 months and 21 months, respectively.

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Commitments And Contingencies

3 Months Ended

Mar. 31, 2012

Commitments And Contingencies [Abstract]

Commitments And Contingencies

NOTE 17 — COMMITMENTS AND CONTINGENCIES

Patent Litigation. On August 27, 2010, we filed a complaint in the United States District Court for the District of Utah against Centrify Corporation and Likewise Software alleging that Centrify's DirectControl software and Likewise's Enterprise software infringe Quest's United States Patent No. 7,617,501 (the "'501 Patent"). Our complaint seeks money damages, costs, attorneys' fees, and the entry of permanent injunctions against each defendant. On December 27, 2011, pursuant to an agreement between the parties, the Court issued an order staying the lawsuit until ninety days after the earlier of (a) the conclusion of all reexamination-related appeals by the Board of Patent Appeals and Interferences pertaining to the '501 Patent and the '005 Patent; (b) if appeals to the Board of Patent Appeals and Interferences are taken in one, but not both of the reexamination proceedings pertaining to the '501 Patent and the '005 Patent, the decision of all reexamination-related appeals by the Board of Patent Appeals and Interferences in the appealed case; or (c) the deadline for the parties to file appeals to the Board of Patent Appeals and Interferences passes in the reexamination proceedings pertaining to both the '501 Patent and the '005 Patent without an appeal being timely filed in either proceeding.

On August 30, 2010, Centrify filed a complaint in the United States District Court for the Northern District of California against Quest alleging that our Authentication Services software infringes Centrify's United States Patent No. 7,591,005 (the "'005 Patent"). Centrify's complaint seeks an unspecified amount of money damages, costs, attorneys' fees, and a permanent injunction. On September 20, 2011, Centrify filed an additional complaint in the United States District Court for the Northern District of California against Quest alleging that our Authentication Services software infringes United States Patent No. 8,024,360 (the "'360 Patent"). Centrify's complaint seeks an unspecified amount of money damages, costs, attorneys' fees, and a permanent injunction. On December 23, 2011, pursuant to an agreement between the parties, the Court issued an order staying both Centrify's infringement action concerning the '005 Patent and Centrify's infringement action concerning the '360 Patent until ninety days after the earlier of (a) the conclusion of all reexamination-related appeals by the Board of Patent Appeals and Interferences pertaining to the '501 Patent and the '005 Patent; (b) if appeals to the Board of Patent Appeals and Interferences are taken in one, but not both of the reexamination proceedings pertaining to the '501 Patent and the '005 Patent, the decision of all reexamination-related appeals by the Board of Patent Appeals and Interferences in the appealed case; or (c) the deadline for the parties to file appeals to the Board of Patent Appeals and Interferences passes in the reexamination proceedings pertaining to both the '501 Patent and the '005 Patent without an appeal being timely filed in either proceeding.

On August 31, 2010, we filed a petition with the United States Patent and Trademark Office alleging that Centrify's '005 Patent is invalid and requesting the United States Patent and Trademark Office to commence an inter partes reexamination of the patentability of Centrify's '005 Patent. On November 15, 2010, the United States Patent and Trademark Office granted our petition for inter partes reexamination of the patentability of Centrify's '005 Patent and issued a first office action rejecting all claims of Centrify's '005 Patent. On January 18, 2011, Centrify filed a response to the United States Patent and Trademark Office's first office action. On October 19, 2011, the United States Patent and Trademark Office issued an Action Closing Prosecution, rejecting all claims of Centrify's '005 Patent. On November 21, 2011, Centrify filed comments after the Action Closing Prosecution. On December 20, 2011, Quest filed a response to Centrify's comments. On January 24, 2012, the United States Patent and Trademark Office issued a Right of Appeal Notice. On April 17, 2012, Centrify filed its appeal brief.

On September 30, 2010, Centrify filed a petition with the United States Patent and Trademark Office alleging that our '501 Patent is invalid and requesting the United States Patent and Trademark Office to commence an inter partes reexamination of the patentability of our '501 Patent. On November 30, 2010, the United States Patent and Trademark Office granted Centrify's petition for inter partes reexamination of the patentability of our '501 Patent. On January 21, 2011, the United States Patent and Trademark Office issued a first office action rejecting all claims of our '501 Patent. Our response to the United States Patent and Trademark Office was filed on March 21, 2011. On October 20, 2011, the United States Patent and Trademark Office issued an Action Closing Prosecution, rejecting all claims of our '501 patent. On December 16, 2011, the United States Patent and Trademark Office issued a Right of Appeal Notice. On January 16, 2012 we filed a Notice of Appeal. On March 15, 2012, we filed our appeal brief. We believe that our '501 patent is valid and enforceable and intend to vigorously defend the patentability of the '501 Patent.

On May 2, 2011, Quest and Likewise agreed to the terms of a Settlement Agreement under which Quest agreed to dismiss the lawsuit against Likewise in exchange for a permanent injunction preventing Likewise (and its subsidiaries, affiliates, successors and assigns) from making, using, selling, offering to sell, importing, exporting, or supporting products or services that constitute technology covered by Quest's '501 patent or that utilize or embody the method covered by Quest's '501 patent. On May 23, 2011, the Utah Court entered the mutually agreed upon permanent injunction against Likewise, ending the case against Likewise.

Merger Litigation. Following the March 9, 2012 announcement that the Company had entered into the Merger Agreement, purported stockholder class actions were filed in the Superior Court of California, County of Orange (the "California Actions") and the Court of Chancery of the State of Delaware (the "Delaware Actions"). In each case, the plaintiff alleges that members of our Board of Directors breached their fiduciary duties to Quest's stockholders in connection with the proposed Merger and that Quest and the Insight Entities aided and abetted the directors' breaches of fiduciary duties. The complaints claim that the proposed Merger involves an unfair price, an inadequate sales process, and unreasonable deal protection devices. Following the April 12, 2012 filing of a preliminary proxy statement on Schedule 14A (the "Proxy Statement") related to the proposed Merger, certain plaintiffs added claims that the Company's disclosures regarding the proposed Merger in the Proxy Statement were inadequate.

In the Delaware Actions, on April 2, April 12, April 17, and April 19, 2012, plaintiffs moved for expedited proceedings and filed competing motions to consolidate the Delaware Actions and for appointment of lead counsel. Defendants opposed expedited proceedings as premature, but did not take a position with regard to the competing motions for consolidation and appointment of lead counsel. On April 25, 2012, the Chancery Court consolidated the Delaware Actions into a single action captioned, In re Quest Software, Inc. Shareholders Litigation, Consol. C.A. No. 7357-VCG, but declined to grant expedited discovery. A further status conference occured on May 9, 2012.

In the California Actions, on April 2 and April 18, 2012, respectively, plaintiffs filed a motion for consolidation and appointment of co-lead counsel and a motion for limited expedited discovery. On April 20, 2012, Defendants filed a motion to stay the California Actions in favor of the Delaware Actions. Defendants did not oppose plaintiffs' motion for consolidation, and on May 3, 2012, the Court consolidated the California Actions into a single action captioned In re Quest Software, Inc. Shareholder Litigation, Lead Case No. 30-2012-00552957-CU-BT-CXC. Defendants' motion to stay and Plaintiffs' motion for limited expedited discovery are scheduled for hearings on May 17 and May 24, 2012, respectively.

Although we cannot know or predict with certainty the outcome of any claim or proceeding or the effect such outcomes may have on us, we believe that any liability resulting from the resolution of any of these matters, individually, or in the aggregate, to the extent not otherwise provided for or covered by insurance, will not have a material adverse effect on our financial position, results of operations or liquidity.

General. The Company and its subsidiaries are also involved in other legal proceedings, claims and litigation arising in the ordinary course of business. The foregoing discussion includes material developments that occurred during the quarter ended March 31, 2012 or thereafter in our material legal proceedings.

Redeemable Noncontrolling Interest. In connection with our acquisition of a 60 percent voting equity interest in Smarsh, Inc. in October 2011, the minority shareholder who holds the remaining 40 percent noncontrolling interest was granted the right to require us to purchase half of the 40 percent noncontrolling interest from the first anniversary until the fifth anniversary of the acquisition date. The maximum redemption value payable by us in that case would be $22 million. This 20 percent noncontrolling interest is accounted for as redeemable noncontrolling interest because redemption is outside our control. As such, the redeemable noncontrolling interest is reported in the mezzanine section in our consolidated balance sheets as temporary equity. As of March 31, 2012, the carrying amount of the redeemable noncontrolling interest was increased to the redemption value of $22 million.

Construction of Building. We entered into development agreement for facilities to house our Business Operations and Advanced Technology Center in Cork, Ireland. As of March 31, 2012, we incurred $5.2 million for the land and $10.5 million for the construction of the building. Under the development agreement, we expect to incur approximately $14 million of capital expenditures to complete the construction of the building.

In the normal course of our business, we enter into certain types of agreements that require us to indemnify or guarantee the obligations of other parties. These commitments include (i) intellectual property indemnities to licensees of our software products, (ii) indemnities to certain lessors under office space leases for certain claims arising from our use or occupancy of the related premises, or for the obligations of our subsidiaries under leasing arrangements, (iii) indemnities to customers, vendors and service providers for claims based on negligence or willful misconduct of our employees and agents, (iv) indemnities to our directors and officers to the maximum extent permitted under applicable law, and (v) letters of credit and similar obligations as a form of credit support for our international subsidiaries and certain resellers. The terms and duration of these commitments varies and, in some cases, may be indefinite, and certain of these commitments do not limit the maximum amount of future payments we could become obligated to make there under; accordingly, our actual aggregate maximum exposure related to these types of commitments cannot be reasonably estimated. Historically, we have not been obligated to make significant payments for obligations of this nature, and no liabilities have been recorded for these obligations in our financial statements included in this report.

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Noncontrolling Interest

3 Months Ended

Mar. 31, 2012

Noncontrolling Interest [Abstract]

Noncontrolling Interest

NOTE 13 — NONCONTROLLING INTEREST

In October 2011, we acquired a 60 percent voting equity interest in Smarsh, Inc., a privately-held company. The minority shareholder who holds the remaining 40 percent noncontrolling interest was granted the right to require us to purchase half of the 40 percent noncontrolling interest from the first anniversary until the fifth anniversary of the acquisition date. The maximum redemption value payable by us in that case would be $22 million. The put right is embedded in the shares owned by the minority shareholder and is not freestanding. This 20 percent noncontrolling interest is accounted for as redeemable noncontrolling interest because redemption is outside our control. As such, the redeemable noncontrolling interest is reported in the mezzanine section as temporary equity in our consolidated balance sheets. The remaining 20 percent noncontrolling interest is presented within total equity in our consolidated balance sheets. Noncontrolling interest that is redeemable at other than fair value is recorded at the higher of its carrying amount or redemption value as if the end of the reporting period was the redemption date. As of March 31, 2012, the carrying amount of the redeemable noncontrolling interest was increased to the redemption value of $22 million. The increase of $0.1 million during the quarter ended March 31, 2012 was recorded in net loss attributable to noncontrolling interest, thereby directly affecting net income attributable to Quest Software, Inc. Net income per share is calculated based on net income attributable to Quest Software, Inc. stockholders.

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Loans Payable

3 Months Ended

Mar. 31, 2012

Loans Payable [Abstract]

Loans Payable

NOTE 9 — LOANS PAYABLE

In February 2011, our line of credit agreement with Wells Fargo Capital Finance, LLC (formerly known as Wells Fargo Foothill, LLC), as arranger, administrative agent and lender, was amended and renewed for a subsequent five-year term (the "Amended Credit Agreement"). The Amended Credit Agreement allows for cash borrowings and letters of credit under a secured revolving credit facility of up to a maximum of $100.0 million. Interest will accrue based on a floating rate based on, at the Company's election, (i) LIBOR (subject to reserve requirements) or (ii) the greater of (a) the Federal Funds Rate plus ¹/2% or (b) Wells Fargo's prime rate, in each case, plus an applicable margin of 1.5% as of March 31, 2012. The Amended Credit Agreement includes limitations on the Company's ability to, among other things, incur debt, grant liens, make acquisitions and other investments, make certain restricted payments such as dividend payments, and dispose of assets. The Amended Credit Agreement is secured by substantially all of the Company's assets, subject to certain exceptions. Fees associated with this amended line of credit were approximately $0.5 million and will be amortized over the life of the credit agreement as interest expense. As of March 31, 2012, we have a $71 million balance outstanding under this line of credit recorded as current loans payable in our consolidated balance sheets.

In August 2009, we entered into a loan agreement with Mutual of Omaha Bank whereby we borrowed an aggregate principal amount of $34 million. The loan is secured by our real property at our headquarters in Aliso Viejo, California. We have used the proceeds from the loan for working capital and other general corporate purposes. The loan matures in five years, during which time we will make equal monthly principal and interest payments at a 7.03% interest rate on a fixed rate, 25-year amortization schedule. Events of default include, among other things, payment defaults, breaches of covenants and bankruptcy events. In the case of a continuing event of default, the lender may, among other things, accelerate the payment of any unpaid principal and interest amounts, increase the then-current interest rate by 5% and foreclose on the real estate collateral. As of March 31, 2012, we have a $32.6 million balance outstanding with $0.6 million recorded as current and $32.0 million recorded as long-term portion of loans payable in our consolidated balance sheets.

We were in compliance with all debt-related covenants as of March 31, 2012.

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Stock-Based Compensation (Summary Of Employee Stock Options Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 Y
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of Quest Software, Inc.	$ 23.27
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, Outstanding at December 31, 2011	15,779
Number of Shares, Granted	133
Number of Shares, Exercised	(863)
Number of Shares, Canceled/forfeited/expired	(427)
Number of Shares, Outstanding at March 31, 2012	14,622
Number of Shares, Vested or expected to vest at March 31, 2012	13,502
Number of Shares, Exercisable at March 31, 2012	5,989
Weighted-Average Exercise Price, Outstanding at December 31, 2011	$ 17.26
Weighted-Average Exercise Price, Granted	$ 19.36
Weighted-Average Exercise Price, Exercised	$ 17.27
Weighted-Average Exercise Price, Canceled/forfeited/expired	$ 18.25
Weighted-Average Exercise Price, Outstanding at March 31, 2012	$ 17.24
Weighted-Average Exercise Price, Vested or expected to vest at March 31, 2012	$ 17.19
Weighted-Average Exercise Price, Exercisable at March 31, 2012	$ 15.42
Weighted-Average Remaining Contractual Term (in years), Outstanding at March 31, 2012	7.22
Weighted-Average Remaining Contractual Term (in years), Vested or expected to vest at March 31, 2012	7.07
Weighted-Average Remaining Contractual Term (in years), Exercisable at March 31, 2012	5.00
Aggregate Intrinsic Value, Outstanding at March 31, 2012	$ 93,754	[1]
Aggregate Intrinsic Value, Vested or expected to vest at March 31, 2012	87,229	[1]
Aggregate Intrinsic Value, Exercisable at March 31, 2012	$ 48,501	[1]

[1] These amounts represent the difference between the exercise price and $23.27, the closing price of Quest Software, Inc. stock on March 31, 2012 as reported on the NASDAQ National Market, for all options outstanding that have an exercise price currently below the closing price.

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Goodwill And Intangible Assets, Net

3 Months Ended

Mar. 31, 2012

Goodwill And Intangible Assets, Net [Abstract]

Goodwill And Intangible Assets, Net

NOTE 7 — GOODWILL AND INTANGIBLE ASSETS, NET

The changes in the carrying amount of goodwill by reportable operating segment (refer to Note 4 – Geographic and Segment Reporting for discussion of our reportable operating segments) for the three months ended March 31, 2012 are as follows (in thousands):

	Licenses			Maintenance Services			Professional Services			Total
Balance as of December 31, 2011	$	542,243		$	307,881		$	8,320		$	858,444
Acquisitions		—			3,817			—			3,817
Adjustments		(59	)		(94	)		(5	)		(158	)
Balance as of March 31, 2012	$	542,184		$	311,604		$	8,315		$	862,103

Intangible assets, net are comprised of the following (in thousands):

	March 31, 2012							December 31, 2011
	Gross Carrying Amount		Accumulated Amortization and Impairments			Net		Gross Carrying Amount		Accumulated Amortization and Impairments			Net
Acquired technology and IPR&D (1)	$	247,654	$	(165,042	)	$	82,612	$	244,680	$	(157,944	)	$	86,736
Customer relationships		124,018		(75,126	)		48,892		122,918		(67,193	)		55,725
Non-compete agreements		15,268		(14,058	)		1,210		15,068		(13,896	)		1,172
Trademarks and trade names (2)		19,596		(13,043	)		6,553		19,596		(12,843	)		6,753
	$	406,536	$	(267,269	)	$	139,267	$	402,262	$	(251,876	)	$	150,386

(1) IPR&D projects were identified and valued related to our acquisitions. These projects are continually assessed for impairment. Upon completion, these projects will be amortized over their estimated useful life.

(2) Trademarks and trade names include $0.8 million in trade names related to our acquisition of PacketTrap that have an indefinite useful life, and as such are not being amortized.

During the first quarter of 2012, customer relationships of $3.4 million related to ChangeBase became impaired. The impairment loss of $3.4 million was recorded in Amortization of other purchased intangible assets in our condensed consolidated income statements.

Amortization expense for intangible assets was $12.0 million and $8.6 million for the three months ended March 31, 2012 and 2011, respectively. Estimated annual amortization expense related to amortizing intangible assets reflected on our March 31, 2012 condensed consolidated balance sheet is as follows (in thousands):

	Estimated Annual Amortization Expense
2012 (remaining 3 quarters)	$	31,116
2013		29,872
2014		27,295
2015		18,691
2016 and thereafter		31,493
Total accumulated amortization	$	138,467

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Cost Method Investments

3 Months Ended

Mar. 31, 2012

Cost Method Investments [Abstract]

Cost Method Investments

NOTE 8 — COST METHOD INVESTMENTS

Our investments in early stage private companies are accounted for under the cost method given that we do not have the ability to exercise significant influence over these companies. The fair value of our cost method investments is not estimated if there are no identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investment. We determined that it is not practicable to estimate the fair value of our cost method investments since these investments were made in privately-held companies that are not subject to the same disclosure regulations as U.S. public companies, and, as such, the basis for an estimated fair value is subject to the completeness, quality, timing and accuracy of data received from these private companies. Our cost method investments are carried at $48.2 million and $46.1 million as part of Other assets in our condensed consolidated balance sheets at March 31, 2012 and December 31, 2011, respectively.

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Other (Expense) Income, Net

3 Months Ended

Mar. 31, 2012

Other (Expense) Income, Net [Abstract]

Other (Expense) Income, Net

NOTE 10 — OTHER (EXPENSE) INCOME, NET

Other (expense) income, net consists of the following (in thousands):

	Three Months Ended March 31
	2012			2011
Interest income	$	525		$	537
Interest expense		(1,131	)		(980	)
Foreign currency gains, net (1)		1,557			3,103
Foreign currency contracts losses, net (2)		(1,743	)		(1,613	)
Other (expense) income		(82	)		109
Total other (expense) income, net	$	(874	)	$	1,156

(1) Our foreign currency gains, net are predominantly attributable to the re-measurement gains or losses on our net balances of monetary assets and liabilities in our foreign subsidiaries which were primarily denominated in the Euro, and to a lesser extent, the British Pound and Canadian Dollar. The foreign currency re-measurement adjustments to these balance sheet items are calculated by comparing the currency spot rates at the end of a month to the spot rates at the end of the previous month.

(2) Relates to changes in fair value of our forward foreign currency contracts not designated as hedging instruments. See Note 15 — Derivative Instruments for further details.

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Derivative Instruments (Summary Of Fair Value Of Foreign Currency Contracts) (Details) (Foreign Currency Contracts [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Prepaid Expenses And Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets fair value designated as hedging instruments	$ 914	[1]	$ 351	[1]
Derivative assets fair value not designated as hedging instruments	478	[1]	2,512	[1]
Other Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities fair value designated as hedging instruments	168	[1]	237	[1]
Derivative liabilities fair value not designated as hedging instruments	$ 68	[1]	$ 63	[1]

[1] Please refer to Note 16 - Fair Value Measurements for additional details.

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Derivative Instruments (Effect Of Derivative Instruments Not Designated As Hedges On Results Of Operations) (Details) (Other (Expense) Income, Net [Member], Foreign Currency Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Other (Expense) Income, Net [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized on derivative instruments	$ (1,743)	$ (1,613)

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Derivative Instruments (Summary Of Notional Amounts For Foreign Currency Contracts) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives designated as hedging instruments	$ 23,380	$ 33,219
Notional amount for foreign currency derivatives not designated as hedging instruments	62,479	71,353
Australian Dollar [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives designated as hedging instruments	2,642	4,078
Notional amount for foreign currency derivatives not designated as hedging instruments	8,539	8,138
Canadian Dollar [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives designated as hedging instruments	8,415	14,158
Chinese Yuan [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives designated as hedging instruments	1,747	2,777
Israeli Shekel [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives designated as hedging instruments	2,370	3,773
Russian Ruble [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives designated as hedging instruments	5,012	8,433
British Pound [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives not designated as hedging instruments	6,355	7,950
Euro [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives designated as hedging instruments	3,194
Notional amount for foreign currency derivatives not designated as hedging instruments	33,303	40,397
Danish Krone [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives not designated as hedging instruments	1,255	891
Norwegian Krone [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives not designated as hedging instruments	1,774	1,073
Swedish Krona [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives not designated as hedging instruments	1,359	446
South Korean Won [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives not designated as hedging instruments	2,217	2,193
Brazil Real [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives not designated as hedging instruments	3,988	3,826
Japanese Yen [Member]
Derivatives, Fair Value [Line Items]
Notional amount for foreign currency derivatives not designated as hedging instruments	$ 3,689	$ 6,439

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Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2012

Derivative Instruments [Abstract]

Summary Of Notional Amounts For Foreign Currency Contracts

Currency	March 31 2012		December 31 2011
Derivatives designated as hedging instruments
Australian Dollar	$	2,642	$	4,078
Canadian Dollar		8,415		14,158
Chinese Yuan		1,747		2,777
Israeli Shekel		2,370		3,773
Russian Ruble		5,012		8,433
Euro		3,194		—
Total	$	23,380	$	33,219
Derivatives not designated as hedging instruments
Danish Krone	$	1,255	$	891
Norwegian Krone		1,774		1,073
Swedish Krona		1,359		446
Euro		33,303		40,397
Australian Dollar		8,539		8,138
South Korean Won		2,217		2,193
Brazil Real		3,988		3,826
Japanese Yen		3,689		6,439
British Pound		6,355		7,950
Total	$	62,479	$	71,353

Summary Of Fair Value Of Foreign Currency Contracts

Derivative Assets

Derivative Liabilities

March 31, 2012

December 31, 2011

March 31, 2012

December 31, 2011

Derivatives designated as hedging instruments

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Foreign currency contracts

Prepaid expenses and other current assets

$

914

Prepaid expenses and other current assets

$

351

Other accrued expenses

$

168

Other accrued expenses

$

237

Derivative Assets

Derivative Liabilities

March 31, 2012

December 31, 2011

March 31, 2012

December 31, 2011

Derivatives not designated as hedging instruments

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Foreign currency contracts

Prepaid expenses and other current assets

$

478

Prepaid expenses and other current assets

$

2,512

Other accrued expenses

$

68

Other accrued expenses

$

63

(1) Please refer to Note 16 – Fair Value Measurements for additional details.

Effect Of Derivative Instruments Designated As Hedges On AOCI

	Three Months Ended March 31
Derivatives designated as hedging instruments	Amount of gain (loss) recognized in AOCI (effective  portion)					Location of (loss) gain reclassified from accumulated AOCI into income statement (effective portion)	Amount of (loss) gain reclassified from accumulated AOCI (effective portion)
	2012		2011				2012			2011
Foreign currency contracts	$	709	$	(407	)	Revenues	$	(118	)	$	(1,030	)
						Operating expenses	$	340		$	500

Effect Of Derivative Instruments Not Designated As Hedges On Results Of Operations

	Three Months Ended March 31
Derivatives not designated as hedging instruments	Location of gain (loss) recognized on derivative instruments		Amount of gain (loss) recognized on derivative instruments
			2012			2011
Foreign currency contracts		Other (expense) income, net	$	(1,743	)	$	(1,613	)

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Goodwill And Intangible Assets, Net (Estimated Annual Amortization Expense Related To Amortizing Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Goodwill And Intangible Assets, Net [Abstract]
2012 (remaining 3quarters)	$ 31,116
2013	29,872
2014	27,295
2015	18,691
2016 and thereafter	31,493
Total accumulated amortization	$ 138,467

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Derivative Instruments

3 Months Ended

Mar. 31, 2012

Derivative Instruments [Abstract]

Derivative Instruments

NOTE 15 — DERIVATIVE INSTRUMENTS

Foreign Exchange Risk Management Policy

Our Foreign Exchange Risk Management Policy identifies target exposures such as balance sheet, cash flow and income statement risks, program objectives, approved financial instruments and counterparties, accounting and tax treatment, as well as oversight, reporting and controls. The functional currency of all our subsidiaries is the U.S. Dollar. Our exposure to foreign exchange risk originates both from the operating results of our foreign operations denominated in currencies other than the U.S. Dollar, as well as our net balances of monetary assets and liabilities within our foreign subsidiaries. These exposures have the potential to produce either gains or losses depending on the directional movement of the foreign currencies versus the U.S. Dollar and our operational profile in foreign subsidiaries. Certain balance sheet items are re-measured each period and the changes in value are recorded within Other (expense) income, net.

We utilize a balance sheet hedging program with the stated objective of reducing volatility within Other (expense) income, net. Under this program, we use derivatives in the form of foreign currency contracts to hedge certain balance sheet exposures. We do not designate these contracts as hedging instruments and therefore do not qualify for hedge accounting. Accordingly, these outstanding non-designated derivatives are recognized in the consolidated balance sheets at fair value and the changes in fair value from these contracts are recorded in Other (expense) income, net, in the consolidated income statements. These derivative contracts typically have a one month term.

We have a cash flow hedging program primarily focused on reducing volatility in our forecasted research and development cash expenses and license revenues, some of which are denominated in non-U.S. Dollar currencies. Under this program, we use derivatives in the form of forward foreign currency contracts and foreign currency option contracts to hedge certain forecasted transactions. These derivatives, with durations ranging from less than one month to nine months, are designated as hedging instruments and qualify for hedge accounting. Accordingly, these outstanding designated derivatives are recognized in the consolidated balance sheets at fair value. Changes in value that are highly effective are recognized in Accumulated other comprehensive income ("AOCI") in the consolidated balance sheets, until the hedged item is recognized in the income statement. Any ineffective portion of a derivative's change in fair value is recorded in Other (expense) income, net, in the consolidated income statements. There was no material ineffectiveness in our cash flow hedging program for the three months ended March 31, 2012.

We had the following notional amounts for our foreign currency contracts included in our consolidated balance sheets (in U.S. Dollars in thousands):

Currency	March 31 2012		December 31 2011
Derivatives designated as hedging instruments
Australian Dollar	$	2,642	$	4,078
Canadian Dollar		8,415		14,158
Chinese Yuan		1,747		2,777
Israeli Shekel		2,370		3,773
Russian Ruble		5,012		8,433
Euro		3,194		—
Total	$	23,380	$	33,219
Derivatives not designated as hedging instruments
Danish Krone	$	1,255	$	891
Norwegian Krone		1,774		1,073
Swedish Krona		1,359		446
Euro		33,303		40,397
Australian Dollar		8,539		8,138
South Korean Won		2,217		2,193
Brazil Real		3,988		3,826
Japanese Yen		3,689		6,439
British Pound		6,355		7,950
Total	$	62,479	$	71,353

Fair Value of Derivative Instruments

The following table provides the fair value of our foreign currency contracts included in our consolidated balance sheets (in thousands):

Derivative Assets

Derivative Liabilities

March 31, 2012

December 31, 2011

March 31, 2012

December 31, 2011

Derivatives designated as hedging instruments

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Balance Sheet Location

Fair Value (1)

Foreign currency contracts

Prepaid expenses and other current assets

$

914

Prepaid expenses and other current assets

$

351

Other accrued expenses

$

168

Other accrued expenses

$

237

Derivative Assets

Derivative Liabilities

March 31, 2012

December 31, 2011

March 31, 2012

December 31, 2011

Derivatives not designated as hedging instruments

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Balance Sheet Location

Fair Value  (1)

Foreign currency contracts

Prepaid expenses and other current assets

$

478

Prepaid expenses and other current assets

$

2,512

Other accrued expenses

$

68

Other accrued expenses

$

63

(1) Please refer to Note 16 – Fair Value Measurements for additional details.

The Effect of Derivative Instruments on Financial Performance

The following tables provide the effect that derivative instruments had on our AOCI and results of operations (in thousands):

	Three Months Ended March 31
Derivatives designated as hedging instruments	Amount of gain (loss) recognized in AOCI (effective  portion)					Location of (loss) gain reclassified from accumulated AOCI into income statement (effective portion)	Amount of (loss) gain reclassified from accumulated AOCI (effective portion)
	2012		2011				2012			2011
Foreign currency contracts	$	709	$	(407	)	Revenues	$	(118	)	$	(1,030	)
						Operating expenses	$	340		$	500

	Three Months Ended March 31
Derivatives not designated as hedging instruments	Location of gain (loss) recognized on derivative instruments		Amount of gain (loss) recognized on derivative instruments
			2012			2011
Foreign currency contracts		Other (expense) income, net	$	(1,743	)	$	(1,613	)

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Acquisitions (Tables)

3 Months Ended

Mar. 31, 2012

Acquisitions [Abstract]

Allocation Of Purchase Price To Assets And Liabilities

Current assets	$	12,479
Acquired technologies with a weighted average useful life of 5.2 years		24,500
In-process research and development		400
Customer relationships with a useful life of 4.0 years		11,300
Trademarks and trade names with a useful life of 10.0 years		1,800
Goodwill		18,690
Deferred income tax assets – non-current		9,872
Other non-current assets		2,419
Current liabilities		(6,328	)
Deferred revenue – current		(9,383	)
Deferred revenue – non-current		(9,491	)
Other long-term liabilities		(278	)
Total purchase price	$	55,980

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Goodwill And Intangible Assets, Net (Changes In Carrying Amount Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Goodwill [Line Items]
Balance as of December 31, 2011	$ 858,444
Acquisitions	3,817
Adjustments	(158)
Balance as of March 31, 2012	862,103
Licenses [Member]
Goodwill [Line Items]
Balance as of December 31, 2011	542,243
Acquisitions
Adjustments	(59)
Balance as of March 31, 2012	542,184
Maintenance Services [Member]
Goodwill [Line Items]
Balance as of December 31, 2011	307,881
Acquisitions	3,817
Adjustments	(94)
Balance as of March 31, 2012	311,604
Professional Services [Member]
Goodwill [Line Items]
Balance as of December 31, 2011	8,320
Acquisitions
Adjustments	(5)
Balance as of March 31, 2012	$ 8,315

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Acquisitions (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Jan. 31, 2011
Business Acquisition [Line Items]
Total purchase price	$ 6,000,000
Allocation of purchase price to goodwill	2,700,000
Allocation of purchase price to intangible assets	3,800,000
BakBone Software Incorporated [Member]
Business Acquisition [Line Items]
Total purchase price	55,980,000
Allocation of purchase price to goodwill	18,690,000
Percentage of voting interest acquired		100.00%
Cash consideration paid		$ 56,000,000
Discount rate used for valuation of intangible assets	28.00%
Goodwill allocation to Licenses	45.00%
Goodwill allocation to Maintenance Services	52.00%
Goodwill allocation to Professional Services	3.00%

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Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 2,601	$ 3,371
Other comprehensive income (loss):
Unrealized income (loss) on foreign currency hedges, net of tax	709	(407)
Unrealized income (loss) on available-for-sale securities, net of tax	252	(22)
Comprehensive income	3,562	2,942
Comprehensive loss attributable to noncontrolling interest	67
Comprehensive income attributable to Quest Software, Inc.	$ 3,629	$ 2,942

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Geographic And Segment Reporting

3 Months Ended

Mar. 31, 2012

Geographic And Segment Reporting [Abstract]

Geographic And Segment Reporting

NOTE 4 — GEOGRAPHIC AND SEGMENT REPORTING

Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by our chief operating decision maker, or decision-making group, in assessing performance and deciding how to allocate resources. Our reportable operating segments are Licenses, Maintenance Services and Professional Services. The Licenses segment develops and markets licenses to use our software products. The Maintenance Services segment provides after-sale support for software products. The Professional Services segment provides consulting and fee-based training related to our software products.

We do not separately allocate operating expenses to these segments, nor do we allocate specific assets to these segments. Therefore, segment information reported includes only revenues, cost of revenues, and gross profit.

Reportable segment data for the three months ended March 31, 2012 and 2011 is as follows (in thousands):

	Licenses		Maintenance Services		Professional Services		Total
Three months ended March 31, 2012:
Revenues	$	69,983	$	126,820	$	15,393	$	212,196
Cost of revenues		9,851		11,820		12,182		33,853
Gross profit	$	60,132	$	115,000	$	3,211	$	178,343
Three months ended March 31, 2011:
Revenues	$	66,735	$	108,066	$	13,356	$	188,157
Cost of revenues		6,434		10,011		10,954		27,399
Gross profit	$	60,301	$	98,055	$	2,402	$	160,758

Revenues are attributed to geographic areas based on the location of the Quest entity from which the products or services were invoiced. Revenues and long-lived assets concerning principal geographic areas in which we operate are as follows (in thousands):

	United States		Ireland		Other International  (2)		Total
Three months ended/As of March 31, 2012:
Revenues	$	123,971	$	39,739	$	48,486	$	212,196
Long-lived assets (1)		122,580		17,506		14,693		154,779
Three months ended/As of March 31, 2011:
Revenues	$	112,747	$	30,964	$	44,446	$	188,157
Long-lived assets (1)		103,637		263		14,112		118,012

(1) Includes property and equipment, net and other assets

(2) No single location within Other International accounts for greater than 10% of total revenues

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Stock-Based Compensation (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 Y	Mar. 31, 2011
2008 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance	19,300,000
Number of shares available for grant	4,800,000
Restricted Stock Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value of RSU awards vested	$ 1.3	$ 2.7
Minimum vesting period of outstanding RSU awards (years)	3
Unrecognized stock-based compensation cost	2.0
Weighted-average recognized period (years)	0.8
Stock Option Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%
Employee Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value of options granted	$ 6.75	$ 9.22
Total intrinsic value of options exercised	5.1	6.6
Total fair value of options vested	12.6	11.3
Unrecognized stock-based compensation cost	$ 46.9
Weighted-average recognized period (years)	4.1
Expected dividend yield
Employee Stock Options [Member] | 2008 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock issued	1
Restricted Stock Award [Member] | 2008 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock issued	1.94

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Fair Value Measurements (Summary Of Book Value And Fair Value Of Current And Long-Term Portion Of Loans Payable) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012		Dec. 31, 2011
Fair Value Measurements [Abstract]
Current portion of loans payable, Book Value	$ 71,614		$ 91,597
Long-term portion of loans payable, Book Value	32,528		32,133
Total loans payable, Book Value	104,142
Current portion of loans payable, Fair Value	71,614	[1]
Long-term portion of loans payable, Fair Value	32,528	[1]
Total loans payable, Fair Value	$ 104,142	[1]

[1] Estimated fair value of long-term debt is measured using the income approach. This fair value measurement is based on similar grade US Treasury security re-priced at March 31, 2012 plus contractual spread and thus represents Level 2 inputs under the fair value hierarchy.

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Geographic And Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2012

Geographic And Segment Reporting [Abstract]

Reportable Segment Data

	Licenses		Maintenance Services		Professional Services		Total
Three months ended March 31, 2012:
Revenues	$	69,983	$	126,820	$	15,393	$	212,196
Cost of revenues		9,851		11,820		12,182		33,853
Gross profit	$	60,132	$	115,000	$	3,211	$	178,343
Three months ended March 31, 2011:
Revenues	$	66,735	$	108,066	$	13,356	$	188,157
Cost of revenues		6,434		10,011		10,954		27,399
Gross profit	$	60,301	$	98,055	$	2,402	$	160,758

Schedule Of Geographical Segment Information

	United States		Ireland		Other International  (2)		Total
Three months ended/As of March 31, 2012:
Revenues	$	123,971	$	39,739	$	48,486	$	212,196
Long-lived assets (1)		122,580		17,506		14,693		154,779
Three months ended/As of March 31, 2011:
Revenues	$	112,747	$	30,964	$	44,446	$	188,157
Long-lived assets (1)		103,637		263		14,112		118,012

(1) Includes property and equipment, net and other assets

(2) No single location within Other International accounts for greater than 10% of total revenues

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Organization, Proposed Merger And Bases Of Presentation (Impact Of Tax Correction To The Consolidated Balance Sheet) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Deferred income taxes, net - current	$ 21,388	$ 21,647
Total current assets	477,077	498,068
Total assets	1,673,283	1,699,518
Income taxes payable - current	14,654	14,482
Total current liabilities	558,217	605,583
Total liabilities	760,028	809,984
Retained earnings	335,725	333,057
Total Quest Software Inc. stockholders' equity	878,373	854,585
Total equity	891,255	867,534
Total liabilities and equity	1,673,283	1,699,518
As Previously Reported [Member]
Deferred income taxes, net - current		19,780
Total current assets		496,201
Total assets		1,697,651
Income taxes payable - current
Total current liabilities		591,101
Total liabilities		795,502
Retained earnings		345,672
Total Quest Software Inc. stockholders' equity		867,200
Total equity		880,149
Total liabilities and equity		1,697,651
As Corrected [Member]
Deferred income taxes, net - current		21,647
Total current assets		498,068
Total assets		1,699,518
Income taxes payable - current		14,482
Total current liabilities		605,583
Total liabilities		809,984
Retained earnings		333,057
Total Quest Software Inc. stockholders' equity		854,585
Total equity		867,534
Total liabilities and equity		1,699,518
Increase/(Decrease) [Member]
Deferred income taxes, net - current		1,867
Total current assets		1,867
Total assets		1,867
Income taxes payable - current		14,482
Total current liabilities		14,482
Total liabilities		14,482
Retained earnings		(12,615)
Total Quest Software Inc. stockholders' equity		(12,615)
Total equity		(12,615)
Total liabilities and equity		$ 1,867

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Stock-Based Compensation

3 Months Ended

Mar. 31, 2012

Stock-Based Compensation [Abstract]

Stock-Based Compensation

NOTE 14 — STOCK-BASED COMPENSATION

We offer stock-based awards to employees, directors and consultants under the Quest Software, Inc. 2008 Stock Incentive Plan (the "2008 Plan"). The 2008 Plan was adopted by our Board of Directors as a means to secure and retain the services of our employees, directors, and consultants, to provide such eligible individuals an opportunity to benefit from increases in the value of our Common Stock through the grant of stock awards, and thereby align the long-term compensation and interests of those individuals with our stockholders.

The 2008 Plan provides for the discretionary grant of incentive stock options, non-statutory stock options, restricted stock awards, restricted stock unit awards, stock appreciation rights, and other forms of equity compensation (collectively, the "stock awards"). The number of shares of Common Stock available for issuance under the 2008 Plan is 19.3 million as of March 31, 2012. The number of shares of Common Stock reserved for issuance under the 2008 Plan will be reduced by 1 share for each share of Common Stock issued under the 2008 Plan pursuant to a stock option and by 1.94 shares for each share of Common Stock issued under the 2008 Plan pursuant to a restricted stock award, restricted stock unit award, or other stock award. As of March 31, 2012, there were 4.8 million shares available for grant under the 2008 Plan.

Stock Option Awards

The fair value of each option award is estimated on the date of grant using a Black-Scholes option valuation model that uses the assumptions noted in the following table. The fair value of these awards is amortized on a straight-line basis over the vesting period. Expected volatilities are based on historical volatilities of Quest's stock. We use historical data to estimate option exercise and employee termination within the valuation model; separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes. The risk-free rate is based on the U.S. Treasury zero-coupon issues in effect at the time of option grant for equivalent remaining terms. We do not expect to pay any dividends and, therefore, we use an expected dividend yield of zero.

We used the following weighted-average assumptions for option awards granted during the three months ended March 31, 2012:

	Three Months Ended March 31
	2012			2011
Expected volatility		36	%		34	%
Expected term (in years)		5.7			5.7
Risk-free interest rate		1.0	%		2.1	%
Expected dividend yield		None			None

A summary of the activity of employee stock options during the three months ended March 31, 2012, and details regarding the options outstanding and exercisable at March 31, 2012, are provided below:

	Number of Shares (in thousands)			Weighted-Average Exercise Price (per share)		Weighted-Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands) (1)
Outstanding at December 31, 2011		15,779		$	17.26
Granted		133		$	19.36
Exercised		(863	)	$	17.27
Canceled/forfeited/expired		(427	)	$	18.25
Outstanding at March 31, 2012		14,622		$	17.24		7.22	$	93,754
Vested or expected to vest at March 31, 2012		13,502		$	17.19		7.07	$	87,229
Exercisable at March 31, 2012		5,989		$	15.42		5.00	$	48,501

(1) These amounts represent the difference between the exercise price and $23.27, the closing price of Quest Software, Inc. stock on March 31, 2012 as reported on the NASDAQ National Market, for all options outstanding that have an exercise price currently below the closing price.

The weighted-average fair value of options granted during the three months ended March 31, 2012 and 2011 was $6.75 and $9.22, respectively. The total intrinsic value of options exercised was $5.1 million and $6.6 million for the three months ended March 31, 2012 and 2011, respectively. The total fair value of options vested during the three months ended March 31, 2012 and 2011 was $12.6 million and $11.3 million, respectively.

Restricted Stock Unit Awards ("RSU Awards")

RSU awards have been granted to selected executives pursuant to our Executive Incentive Plan. We have also granted RSU awards to key employees pursuant to a Profit Sharing Plan. Our outstanding RSU awards vest over three years with vesting contingent upon continuous service and meeting certain company-wide performance goals, including sales, operating profit margin, and cash flow targets. We estimate the fair value of RSU awards using the market price of our common stock on the date of the grant. The fair value of these awards is amortized on a straight-line basis over the vesting period. Additionally, a portion of each RSU award is settled in cash, only to the extent necessary to pay the minimum tax withholding or any government levies on the restricted stock unit.

A summary of our RSU awards activity during the three months ended March 31, 2012 is provided below:

	Number of Shares			Weighted-Average Grant Date Fair Value (per share)
Nonvested at January 1, 2012		236,331		$	15.88
Granted		—		$	—
Vested		(86,524	)	$	14.66
Forfeited		(9,623	)	$	15.91
Nonvested at March 31, 2012(1)		140,184		$	16.63

(1) 132,135 of these shares are expected to vest.

The total fair value of RSU awards vested during the three months ended March 31, 2012 and 2011 was $1.3 million and $2.7 million, respectively.

Stock-Based Compensation Expense

The following table presents the income statement classification of all stock-based compensation expense for the three months ended March 31, 2012 and 2011 (in thousands):

	Three Months Ended March 31
	2012		2011
Cost of services	$	232	$	316
Sales and marketing		1,728		2,109
Research and development		1,497		2,152
General and administrative		2,628		2,836
Total stock-based compensation		6,083		7,413
Tax benefit associated with stock-based compensation expense (1)		2,385		2,869
Reduction of net income	$	3,698	$	4,544

(1) The recognized tax benefit related to stock-based compensation expense was estimated to be 39.2% and 38.7% for the quarter ended March 31, 2012 and 2011, respectively. This approximates the blended Federal and State statutory tax rate after the benefit for state taxes.

As of March 31, 2012, total unrecognized stock-based compensation cost related to unvested stock option awards was $46.9 million, which is expected to be recognized over a weighted-average period of 4.1 years and total unrecognized stock-based compensation cost related to unvested RSU awards was $2.0 million, which is expected to be recognized over a weighted-average period of 0.8 years.