Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 3,800	$ 4,107
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on change in fair value of contingent consideration, net	159	203
Depreciation and amortization	1,765	2,068
Non-cash compensation expense	1,496	1,338
Changes in other operating items:
Accounts and other receivables	4,644	11,430
Costs and estimated earnings in excess of billings on uncompleted contracts	3,914	(6,733)
Prepaid expenses and other current assets	(2,641)	(3,866)
Accounts payable and accrued expenses	(3,654)	(1,674)
Billings in excess of costs and estimated earnings on uncompleted contracts	(376)	(3,286)
Other	(544)	(390)
Net cash provided by operating activities	8,563	3,197
Cash flows from investing activities:
Additions to property, plant and equipment	(575)	(600)
Acquisitions, net of cash acquired	(2,330)	0
Other investing activities	13	0
Net cash used in investing activities	(2,892)	(600)
Cash flows from financing activities:
Proceeds from (repayment of) short-term borrowings	(992)	735
Repayment of long-term debt	(3,333)	(3,333)
Change in negative cash book balance	(1,659)	(1,518)
Repurchases of common stock in the open market	(4,291)	(364)
Other financing activities	0	25
Net cash used in financing activities	(10,275)	(4,455)
Effect of exchange rate changes on cash and cash equivalents	44	(548)
Net decrease in cash and cash equivalents	(4,560)	(2,406)
Cash and cash equivalents at beginning of period	21,030	14,541
Cash and cash equivalents at end of period	16,470	12,135
Cash paid during the period for income taxes	$ 2,594	$ 2,251