CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net revenues	$ 118,990	$ 110,937	$ 235,915	$ 223,432
Cost of revenues (exclusive of depreciation and amortization shown separately below)	49,315	45,356	96,657	89,431
Selling and marketing	34,247	28,791	70,359	61,759
General and administrative (exclusive of expenses shown separately below)	14,217	14,550	27,998	29,000
Research and development	2,627	3,358	5,803	6,935
Excise and sales tax expense		439	21	439
Depreciation	7,710	6,209	15,435	12,541
Amortization	1,739	1,874	3,449	4,112
Restructuring costs		1,851		2,083
Asset impairments	35	91	54	129
Net legal settlements and related expenses	12	41	12	380
Acquisition-related costs	60	142	60	316
Total operating expenses	109,962	102,702	219,848	207,125
Operating income	9,028	8,235	16,067	16,307
Other (expense) income
Interest expense	(2,108)	(3,905)	(4,189)	(6,322)
Unrealized gain on change in fair value of interest rate swaps		490		974
Interest income	11	36	26	71
Other, net	(167)	74	(378)	84
Total other expense	(2,264)	(3,305)	(4,541)	(5,193)
Income from continuing operations before income taxes	6,764	4,930	11,526	11,114
Income tax expense	1,911	1,040	3,741	2,345
Net income from continuing operations	4,853	3,890	7,785	8,769
Income from discontinued operations, net of taxes	36	510	5	3,203
Net income	$ 4,889	$ 4,400	$ 7,790	$ 11,972
BASIC WEIGHTED-AVERAGE SHARES OUTSTANDING (in Shares)	50,173	58,367	50,465	58,294
Basic net income per share
Continuing operations (in Dollars per share)	$ 0.10	$ 0.07	$ 0.15	$ 0.15
Discontinued operations (in Dollars per share)		$ 0.01		$ 0.05
Net income per share (in Dollars per share)	$ 0.10	$ 0.08	$ 0.15	$ 0.21
DILUTED WEIGHTED-AVERAGE SHARES OUTSTANDING (in Shares)	50,508	58,774	50,788	58,655
Diluted net income per share
Continuing operations (in Dollars per share)	$ 0.10	$ 0.07	$ 0.15	$ 0.15
Discontinued operations (in Dollars per share)		$ 0.01		$ 0.05
Net income per share (in Dollars per share)	$ 0.10	$ 0.07	$ 0.15	$ 0.20

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Total costs, exclusive of depreciation and amortization shown seperately on the consolidated statements of operations, related to services rendered and goods produced and sold during the reporting period.

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The aggregate total of expenses, exclusive of those expenses shown seperately on the consolidated statements of operations, of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product, service, service line or product line.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

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-Subparagraph a(2)

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The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Total costs of sales and operating expenses for the period.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The amount of net income or loss for the period per each share of common stock outstanding during the reporting period.

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The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period.

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The amount of excise and sales taxes included in sales and revenues, which are then deducted as a cost of sales. Includes excise taxes, which are applied to specific types of transactions or items (such as gasoline or alcohol); and sales, use and value added taxes, which are applied to a broad class of revenue-producing transactions involving a wide range of goods and services.

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-Name Emerging Issues Task Force (EITF)
-Number 06-3
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The net proceeds or assets obtained in excess of (less than) the net carrying amount of assets recorded, or assets distributed and liabilities assumed less than (in excess of) litigation reserves extinguished, in settlement of a litigation matter. Represents (for other than an insurance entity in its normal claims settlement process), the amount of income (expense) recognized in the period to settle pending or threatened litigation and insurance claims.

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This element represents the income or loss from continuing operations attributable to the reporting entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items and cumulative effects of changes in accounting principles, but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests, if any.

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-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph b(1)

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Sum of operating profit and nonoperating income (expense) before income (loss) from equity method investments, income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest.

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-Subparagraph 1(i)
-Article 4

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The amount of income (loss) from continuing operations per each share of common stock outstanding during the reporting period.

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The amount of income (loss) from continuing operations available to each share of common stock outstanding during the reporting period and each share that would have been outstanding assuming the issuance of common shares for all dilutive potential common shares outstanding during the reporting period.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 18
-Article 7

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This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items and the cumulative effect of accounting changes before deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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-Publisher SEC
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-Publisher SEC
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-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-Subparagraph c

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The amount of income (loss) from disposition of discontinued operations, net of related tax effect, per each share of common stock outstanding during the reporting period.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 8, 9, 10, 36, 37, 38

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-Publisher SEC
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-Number 210
-Section 04
-Paragraph 21
-Article 9

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The amount of income (loss) from discontinued operations, net of related tax effect, per each diluted share of common stock outstanding during the reporting period.

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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
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-Section E
-Paragraph Question 3

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- Definition

The sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations.

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-Publisher SEC
-Name Regulation S-X (SX)
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-Subparagraph a, b

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- Definition

The cost of borrowed funds accounted for as interest that was charged against earnings during the period.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 9
-Article 9

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- Definition

Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money.

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-Section 03
-Paragraph 7
-Article 5

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- Definition

The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

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-Paragraph 28, 29, 30

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The aggregate amount of income (expense) from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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-Publisher SEC
-Name Regulation S-X (SX)
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-Article 5

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The net result for the period of deducting operating expenses from operating revenues.

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- Definition

The net amount of other nonoperating income and expense, which does not qualify for separate disclosure on the income statement under materiality guidelines.

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-Publisher SEC
-Name Regulation S-X (SX)
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-Section 03
-Paragraph 9
-Article 5

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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-Paragraph 12, 13

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- Definition

Amount charged against earnings in the period for incurred and estimated costs, excluding asset retirement obligations, associated with exit from or disposal of business activities or restructurings pursuant to a program that is planned and controlled by management, and materially changes either the scope of a business undertaken by an entity, or the manner in which that business is conducted.

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-Section P
-Subsection 3, 4

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 1
-Article 5

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- Definition

The aggregate total amount of expenses directly related to the marketing or selling of products or services.

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- Definition

The increases (decreases) in the market value of derivative instruments, including options, swaps, futures, and forward contracts, which were included in earnings in the period.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28

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- Definition

The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period.

+ References

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 40
-Subparagraph a

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8

+ Details

Name:	us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of [basic] shares, after adjustment for contingently issuable shares and other shares not deemed outstanding, determined by relating the portion of time within a reporting period that common shares have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8

+ Details

Name:	us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration