Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows—operating activities:
Net income	$ 1,325	$ 3,426
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	3,672	3,732
Deferred income taxes	2,270	296
Stock-based compensation expense	1,831	1,033
Accretion expense related to earnout payments	345	298
Changes in assets and liabilities:
Account receivables	(17,048)	(16,198)
Accounts payable	1,523	2,315
Accrued expenses	(105,719)	(76,923)
Deferred revenue	4,304	228
Income taxes payable, net	(5,812)	(4,612)
Retirement and pension plan assets and liabilities	2,294	1,308
Prepaid expenses	(2,564)	(794)
Other assets and liabilities, net	(5,603)	(1,880)
Net cash used in operating activities	(119,182)	(87,771)
Cash flows—investing activities:
Restricted cash	6,501	0
Payments to Acquire Businesses, Gross	(8,770)	0
Capital expenditures	(721)	(6,282)
Purchases of available for sale investments	(2,132)	(1,154)
Proceeds from sales of available for sale investments	119	119
Net cash used in investing activities	(5,003)	(7,317)
Cash flows—financing activities:
Debt repayment	0	(1,500)
Cash dividends paid	(2,450)	(2,511)
Payment of employee tax withholdings on equity transactions	(2,676)	(820)
Acquisition earnout payments	(387)	(723)
Net cash used in financing activities	(5,513)	(5,554)
Effect of exchange rates fluctuations on cash and cash equivalents	1,293	(3,085)
Net decrease in cash and cash equivalents	(128,405)	(103,727)
Cash and cash equivalents at beginning of period	190,452	211,352
Cash and cash equivalents at end of period	$ 62,047	$ 107,625