Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 4,384	$ 2,590
Adjustments to reconcile net income to net cash provided by operating activities:
Loss (gain) on change in fair value of contingent consideration, net	40	(246)
Depreciation and amortization	1,858	1,066
Deferred income taxes	47	(70)
Non-cash compensation expense	973	653
Changes in other operating items:
Accounts and other receivables	5,149	(239)
Costs and estimated earnings in excess of billings on uncompleted contracts	(4,550)	(360)
Prepaid expenses and other current assets	(1,454)	(1,393)
Accounts payable and accrued expenses	1,094	211
Billings in excess of costs and estimated earnings on uncompleted contracts	340	434
Contingent consideration payments in excess of fair value on acquisition date	(602)
Other	(316)	(270)
Net cash provided by operating activities	6,963	2,376
Cash flows from investing activities:
Additions to property, plant and equipment	(925)	(758)
Acquisitions, net of cash acquired		(1,486)
Net cash used in investing activities	(925)	(2,244)
Cash flows from financing activities:
Change in negative cash book balances	(1,004)	(5)
Contingent consideration payments	(835)
Proceeds from stock option exercises	9	231
Other financing activities	(236)	(50)
Net cash provided by (used in) financing activities	(2,066)	176
Effect of exchange rate changes on cash and cash equivalents	138	149
Net increase in cash and cash equivalents	4,110	457
Cash and cash equivalents at beginning of period	4,151	28,902
Cash and cash equivalents at end of period	$ 8,261	$ 29,359