Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities
Net income	$ 11,038	$ 6,306
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,667	4,648
Loss on retirement of fixed assets		3
Amortization of deferred financing costs	340	423
Share based compensation	3,322	2,811
Excess tax benefit on stock options	(898)	(395)
Provision for doubtful accounts	71	16
Deferred income taxes	559	526
Unrealized currency (gain) loss on foreign denominated intercompany transactions	(451)	2,140
Unrealized loss (gain) on derivatives	885	(1,820)
Changes in operating assets and liabilities:
Accounts receivable	(1,217)	627
Income tax refunds receivable	(100)
Prepaid expenses and other assets	(113)	590
Accounts payable	(253)	562
Accrued income taxes	(1,161)	147
Accrued expenses and other liabilities	(2,303)	943
Deferred revenue	3,083	4,391
Net cash provided by operating activities	17,469	21,918
Cash flows from investing activities
Purchases of property and equipment	(791)	(189)
Purchase of exclusive license		(2,000)
Net cash used in investing activities	(791)	(2,189)
Cash flows from financing activities
Payments on long-term debt	(8,855)	(10,583)
Excess tax benefit on stock options	898	395
Proceeds from exercises of common stock options	1,480	476
Net cash used in financing activities	(6,477)	(9,712)
Effect of exchange rates on cash and cash equivalents	73	39
Increase in cash and cash equivalents	10,274	10,056
Cash and cash equivalents at beginning of period	42,786	34,616
Cash and cash equivalents at end of period	$ 53,060	$ 44,672