Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 11,920	$ 8,457
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on reversal of deferred rent liability	(1,041)
Gain on change in fair value of contingent consideration, net	(506)	(1,478)
Depreciation and amortization	4,329	3,305
Deferred income taxes	(897)	253
Non-cash compensation expense	2,188	1,265
Changes in other operating items:
Accounts and other receivables	3,667	4,059
Costs and estimated earnings in excess of billings on uncompleted contracts	(5,380)	(1,903)
Prepaid expenses and other current assets	(1,398)	2,169
Accounts payable and accrued expenses	882	4,624
Billings in excess of costs and estimated earnings on uncompleted contracts	(2,040)	2,435
Contingent consideration payments in excess of fair value on acquisition date	(721)
Other	(442)	(101)
Net cash provided by operating activities	10,561	23,085
Cash flows from investing activities:
Additions to property, plant and equipment	(2,397)	(576)
Acquisitions, net of cash acquired	(35,785)	(2,767)
Net cash used in investing activities	(38,182)	(3,343)
Cash flows from financing activities:
Proceeds from short-term borrowings	6,154
Contingent consideration payments	(1,238)
Repurchases of common stock in the open market	(956)	(266)
Other	234	(211)
Net cash provided by (used in) financing activities	4,194	(477)
Effect of exchange rate changes on cash and cash equivalents	(28)	4
Net increase (decrease) in cash and cash equivalents	(23,455)	19,269
Cash and cash equivalents at beginning of period	28,902	10,803
Cash and cash equivalents at end of period	$ 5,447	$ 30,072