Condensed Consolidated Statements of Cash Flow (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 15,685	$ 15,164
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,941	1,877
Share based compensation	548	556
Provision for doubtful accounts	266	11
Provision (benefit) for deferred taxes	(1,401)	2,198
Debt discount amortization on convertible debt	0	21
Unrealized foreign exchange gain (loss) on forward contracts	0	(152)
Unrealized foreign currency exchange gain (loss)	661	(1,890)
(Gain) loss on put option	0	354
Changes in assets and liabilities, net of effects from acquisitions:
Accounts receivable	1,771	(5,987)
Other assets	(302)	1,278
Accounts payable and accrued expenses	(861)	(2,357)
Accrued payroll and related benefits	(1,575)	(1,463)
Deferred revenue	(560)	689
Deferred rent	(75)	(55)
Other current liabilities	(2,336)	69
Net cash provided by operating activities	13,762	10,313
Cash flows from investing activities:
Acquisition of ADAM, net of cash acquired	0	3,529
Maturities of marketable securities	979	7,960
Purchases of marketable securities	0	(5,384)
Capital expenditures	(673)	(524)
Net cash provided by/(used in) investing activities	306	5,581
Cash flows from financing activities:
Principal payments of term loan obligation	0	(1,407)
Repurchases of common stock	0	(2,395)
Proceeds from the exercise of stock options	14	1
Dividend payments	(1,464)	0
Payments of capital lease obligations	(45)	(102)
Net cash used in financing activities	(1,495)	(3,903)
Effect of foreign exchange rates on cash	871	201
Net change in cash and cash equivalents	13,444	12,192
Cash and cash equivalents at the beginning of the period	23,696	23,397
Cash and cash equivalents at the end of the period	37,140	35,589
Supplemental disclosures of cash flow information:
Interest paid	312	204
Income taxes paid	$ 3,030	$ 558