Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net income (loss)	$ (32,338)	$ 44,462	$ (8,660)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	17,472	17,723	13,664
Stock-based compensation expense	5,873	5,352	4,733
Deferred income taxes	7,320	(2,192)	(653)
Change in fair value of contingent consideration liability	(270)	(37,873)	(31,331)
Goodwill impairment charge	37,539	0	37,908
Intangible asset impairment charges	202	2,710	0
Bad debt provision	1,949	1,984	1,285
Secured asset reserve	2,022	940	0
Venezuela remeasurement charges	(890)	0	0
Reduction of prepaid commissions	0	0	3,940
Excess tax benefit from exercise of stock awards	0	(185)	2,619
Other operating activities	210	364	239
Change in assets, net of acquisitions:
Accounts receivable and unbilled revenue	(10,361)	(14,793)	(4,843)
Inventories	(8,188)	(635)	(1,384)
Prepaid expenses and other assets	(6,138)	(7,335)	2,332
Change in liabilities, net of acquisitions:
Accounts payable	26,199	(25,199)	29,643
Accrued expenses and other liabilities	1,021	2,162	(12,121)
Net cash provided by (used in) operating activities	43,402	(12,515)	37,371
Cash flows from investing activities
Purchases of property and equipment	(15,034)	(14,116)	(12,226)
Payments for acquisitions, net of cash acquired	0	0	(19,301)
Other investing activities	0	(594)	0
Net cash used in investing activities	(15,034)	(14,710)	(31,527)
Cash flows from financing activities
Net repayments of revolving credit facility	(5,281)	35,539	4,000
Net short-term secured borrowings (repayments)	(799)	2,618	0
Repurchases of common stock	(4,897)	0	0
Payments of contingent consideration	(8,010)	(5,769)	(7,298)
Proceeds from exercise of stock options	1,195	778	2,005
Payment of debt issuance costs	0	(696)	(325)
Excess tax benefit from exercise of stock awards	0	185	(2,619)
Other financing activities	(594)	(399)	(411)
Net cash provided by (used in) financing activities	(18,386)	32,256	(4,648)
Effect of exchange rate changes on cash and cash equivalents	(1,805)	(1,059)	191
Increase in cash and cash equivalents	8,177	3,972	1,387
Cash and cash equivalents, beginning of period	22,578	18,606	17,219
Cash and cash equivalents, end of period	$ 30,755	$ 22,578	$ 18,606