CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss) including noncontrolling interests	$ 28,556	$ 11,849	$ (36,492)
Adjustments to reconcile net income (loss) to net cash provided by operating activities-
Amortization of identifiable intangible assets	7,132	8,837	7,462
Depreciation expense	11,440	11,793	12,591
Goodwill and other intangible asset impairments			58,922
Bad debt expense	19	2,453	936
Deferred tax expense (benefit)	4,514	3,541	(9,525)
Amortization of debt financing costs	245	229	226
Gain on sale of assets	(589)	(607)	(239)
Changes in the fair value of contingent earn-out obligations	(1,646)	(662)	(5,528)
Stock-based compensation expense	3,974	2,797	3,604
(Increase) decrease in-
Receivables, net	(12,427)	2,913	10,390
Inventories	1,208	1,195	(270)
Prepaid expenses and other current assets	(109)	370	977
Costs and estimated earnings in excess of billings	(1,918)	1,636	4,162
Other noncurrent assets	(491)	(3,334)	917
Increase (decrease) in-
Accounts payable and accrued liabilities	6,776	(15,507)	(21,477)
Billings in excess of costs and estimated earnings	(9,226)	1,776	5,426
Other long-term liabilities	965	1,231	(2,402)
Net cash provided by operating activities	38,423	30,510	29,680
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(17,403)	(11,782)	(8,666)
Proceeds from sales of property and equipment	1,107	1,106	717
Proceeds from businesses sold	43	164	156
Sales of marketable securities			2,000
Cash paid for acquisitions, earn-outs and intangible assets, net of cash acquired		(12,656)	(29,957)
Net cash used in investing activities	(16,253)	(23,168)	(35,750)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on other long-term debt	(5,400)	(7,349)	(14,387)
Debt financing costs	(552)		(517)
Payments of dividends to shareholders	(7,875)	(7,498)	(7,520)
Share repurchase program	(1,832)	(2,860)	(7,256)
Shares received in lieu of tax withholding	(631)	(544)	(662)
Excess tax benefit of stock-based compensation	534	100	210
Proceeds from exercise of options	4,883	329	293
Capital contribution from noncontrolling interests			800
Net cash used in financing activities	(10,873)	(17,822)	(29,039)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	11,297	(10,480)	(35,109)
CASH AND CASH EQUIVALENTS, beginning of year-continuing operations and discontinued operations	40,757	51,237	86,346
CASH AND CASH EQUIVALENTS, end of year-continuing operations and discontinued operations	$ 52,054	$ 40,757	$ 51,237