Condensed Unaudited Consolidated Statements Of Cash Flows - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net (loss) income		$ (6,388)	$ 12,142
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Depreciation and amortization		42,598	33,494
Non-cash interest expense		639	2,362
Non-cash stock-based compensation expense		3,575	3,260
Excess tax benefit from stock-based compensation	[1]	0	(3,246)
(Benefit from) provision for deferred income taxes		(6,693)	3,281
Other non-cash items		473	623
(Gains) losses on sales of assets		(441)	(1,622)
Changes in assets and liabilities, net of acquisitions:
Accounts receivable		150,006	(33,073)
Inventories		12,278	(13,313)
Other assets, current and long-term portion		(2,841)	6,608
Accounts payable and accrued expenses		(78,700)	(14,540)
Billings in excess of costs and earnings		(7,510)	(12,247)
Book overdrafts		7,861	1,266
Other liabilities, current and long-term portion		3,969	(5,389)
Net cash provided by (used in) operating activities		118,826	(20,394)
Cash flows (used in) provided by investing activities:
Cash paid for acquisitions, net of cash acquired		(148)	(23,831)
Capital expenditures		(19,660)	(35,554)
Proceeds from sale of property and equipment		1,360	3,373
Payments for other investments, net		(31,959)	(1,098)
Net cash used in investing activities		(50,407)	(57,110)
Cash flows (used in) provided by financing activities:
Proceeds from credit facilities		439,507	233,872
Repayments of credit facilities		(404,776)	(157,349)
Repayments of other borrowings		(3,115)	(2,830)
Payments of capital lease obligations		(12,110)	(10,956)
Repurchase of common stock		(83,261)	0
Proceeds from stock-based awards, net of tax withholdings		925	(1,451)
Excess tax benefit from stock-based compensation		0	3,246
Payments of financing costs		0	(218)
Net cash (used in) provided by financing activities		(62,830)	64,314
Effect of currency translation on cash		(957)	(476)
Net increase (decrease) in cash and cash equivalents		4,632	(13,666)
Cash and cash equivalents - beginning of period		24,059	22,927
Cash and cash equivalents - end of period		28,691	9,261
Supplemental cash flow information:
Interest paid		15,633	12,430
Income taxes paid, net of refunds		1,473	11,928
Supplemental disclosure of non-cash information:
Equipment acquired under capital lease		4,011	8,240
Earn-Out Arrangements [Member]
Supplemental disclosure of non-cash information:
Acquisition-related contingent consideration, new business combinations		0	8,700
Equipment [Member]
Supplemental disclosure of non-cash information:
Equipment acquired under financing arrangements		$ 9,385	$ 5,780

[1] Excess tax benefits, which represent cash flows from tax deductions in excess of the tax effect of compensation expense associated with exercised stock options and vested restricted shares, are classified as financing cash flows in the Company’s condensed unaudited consolidated statements of cash flows. There were no excess tax benefits for the three month period ended March 31, 2015.