Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities
Net income	$ 21,125	$ 17,030
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,985	6,987
Loss on retirement of fixed assets		2
Amortization of deferred financing costs	228	403
Loss on extinguishment of debt		422
Share based compensation	5,300	5,128
Excess tax benefit on stock options	(878)	(1,046)
Provision for doubtful accounts	8	95
Deferred income taxes	1,987	855
Unrealized currency gain on foreign denominated intercompany transactions	(96)	(124)
Unrealized loss on derivatives	432	326
Changes in operating assets and liabilities:
Accounts receivable	616	(1,932)
Prepaid expenses and other assets	(238)	521
Accounts payable	17	(274)
Accrued income taxes	1,756	(857)
Income tax refunds receivable	(429)	6
Accrued expenses and other liabilities	(441)	(1,474)
Deferred revenue	(928)	2,169
Net cash provided by operating activities	36,444	28,237
Cash flows from investing activities
Purchases of property and equipment	(1,046)	(1,462)
Purchase of exclusive license and other intangible assets	(150)
Acquisition of business, net of cash acquired	(49,090)	(219)
Net cash used in investing activities	(50,286)	(1,681)
Cash flows from financing activities
Payments on long-term debt	(30,000)	(76,845)
Proceeds from issuance of debt	25,000	56,065
Excess tax benefit on stock options	878	1,046
Proceeds from exercises of common stock options	2,098	1,840
Net cash used in financing activities	(2,024)	(17,894)
Effect of exchange rates on cash and cash equivalents	4	30
(Decrease) increase in cash and cash equivalents	(15,862)	8,692
Cash and cash equivalents at beginning of period	53,850	42,786
Cash and cash equivalents at end of period	$ 37,988	$ 51,478