CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income including noncontrolling interests	$ 11,612	$ 5,325	$ 22,621	$ 6,704
Adjustments to reconcile net income to net cash provided by (used in) operating activities-
Amortization of identifiable intangible assets	1,739	2,411	5,408	6,557
Depreciation expense	2,866	2,921	8,511	8,924
Bad debt expense	(60)	(18)	(378)	2,468
Deferred tax expense (benefit)	692	641	1,168	(204)
Amortization of debt financing costs	65	57	180	172
Gain on sale of assets	(117)	(99)	(367)	(554)
Changes in the fair value of contingent earn-out obligations	(750)	38	(696)	105
Stock-based compensation expense	523	462	3,243	2,106
(Increase) decrease in-
Receivables, net	23,944	16,019	(6,976)	(3,887)
Inventories	315	557	302	925
Prepaid expenses and other current assets	(122)	158	(11)	737
Costs and estimated earnings in excess of billings	(886)	558	(3,996)	(2,681)
Other noncurrent assets	(186)	(593)	63	(2,535)
Increase (decrease) in-
Accounts payable and accrued liabilities	671	(9,178)	5,413	(14,878)
Billings in excess of costs and estimated earnings	(13,517)	(2,888)	(11,248)	(1,240)
Other long-term liabilities	644	84	545	713
Net cash provided by operating activities	27,433	16,455	23,782	3,432
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(5,234)	(2,817)	(12,471)	(9,405)
Proceeds from sales of property and equipment	64	205	566	967
Proceeds from businesses sold		43	43	121
Cash paid for acquisitions, earn-outs and intangible assets, net of cash acquired		(428)		(12,656)
Net cash used in investing activities	(5,170)	(2,997)	(11,862)	(20,973)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings (payments) on revolving line of credit	5,000	(4,000)	5,000	14,000
Payments on other long-term debt	(3,400)	(300)	(5,400)	(4,400)
Debt financing costs			(552)
Payments of dividends to shareholders	(2,052)	(1,859)	(5,818)	(5,641)
Share repurchase program	(1,177)	(512)	(1,832)	(1,424)
Shares received in lieu of tax withholding	8	8	(614)	(535)
Excess tax benefit of stock-based compensation	(17)	25	226	(101)
Proceeds from exercise of options	1,334	34	1,618	70
Net cash provided by (used in) financing activities	(304)	(6,604)	(7,372)	1,969
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	21,959	6,854	4,548	(15,572)
CASH AND CASH EQUIVALENTS, beginning of period	23,346	28,811	40,757	51,237
CASH AND CASH EQUIVALENTS, end of period	$ 45,305	$ 35,665	$ 45,305	$ 35,665