Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 4,317	$ 4,925
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on change in fair value of contingent consideration, net	(377)	(247)
Depreciation and amortization	2,408	1,958
Deferred income taxes	0	(274)
Non-cash compensation expense	1,112	953
Changes in other operating items:
Accounts and other receivables	(542)	12,508
Costs and estimated earnings in excess of billings on uncompleted contracts	(10,338)	(3,887)
Prepaid expenses and other current assets	(1,383)	(136)
Accounts payable and accrued expenses	1,938	(6,042)
Billings in excess of costs and estimated earnings on uncompleted contracts	4,316	(3,914)
Contingent consideration payments in excess of fair value on acquisition date	(667)	(373)
Other	(63)	(155)
Net cash provided by operating activities	721	5,316
Cash flows from investing activities:
Additions to property, plant and equipment	(916)	(830)
Net cash used in investing activities	(916)	(830)
Cash flows from financing activities:
Proceeds from short-term borrowings	2,370	0
Change in negative cash book balances	(1,898)	0
Contingent consideration payments	(338)	(602)
Repurchases of common stock in the open market	(320)	(451)
Other financing activities	45	(4)
Net cash used in financing activities	(141)	(1,057)
Effect of exchange rate changes on cash and cash equivalents	(84)	(143)
Net increase in cash and cash equivalents	(420)	3,286
Cash and cash equivalents at beginning of period	5,647	7,761
Cash and cash equivalents at end of period	5,227	11,047
Supplemental disclosures of cash flow information:
Cash paid during the year for income taxes	$ 2,999	$ 1,730