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	$ 5,720	$ 5,440
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,333	2,304
Amortization of deferred financing costs	76	172
Share based compensation	1,923	1,569
Excess tax benefit on stock options	(352)	(419)
Provision for doubtful accounts	26	5
Deferred income taxes	116	242
Unrealized currency gain on foreign denominated intercompany transactions	(258)	(376)
Unrealized loss on derivatives	234	629
Changes in operating assets and liabilities:
Accounts receivable	360	871
Prepaid expenses and other assets	(407)	154
Accounts payable	(609)	27
Accrued income taxes	1,136	425
Accrued expenses and other liabilities	(2,939)	(3,624)
Deferred revenue	670	(379)
Net cash provided by operating activities	8,029	7,040
Cash flows from investing activities
Purchases of property and equipment	(296)	(307)
Purchase of exclusive license and other intangible assets	(150)
Acquisition of business, net of cash acquired	(46,536)
Increase in restricted cash for acquisition of business	(2,613)
Net cash used in investing activities	(49,595)	(307)
Cash flows from financing activities
Payments on long-term debt	(10,000)	(1,605)
Proceeds from issuance of long-term debt	25,000
Excess tax benefit on stock options	352	419
Proceeds from exercises of common stock options	403	558
Net cash provided by (used in) financing activities	15,755	(628)
Effect of exchange rates on cash and cash equivalents	38	9
(Decrease) increase in cash and cash equivalents	(25,773)	6,114
Cash and cash equivalents at beginning of period	53,850	42,786
Cash and cash equivalents at end of period	$ 28,077	$ 48,900