Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ (95,784)	$ 22,696
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	118,954	47,244
Deferred income taxes	(24,405)	2,917
Provision for doubtful accounts, net of write-offs	3,768	300
Equity in (earnings) loss from unconsolidated affiliate	(655)	(258)
(Gain) loss on disposal of assets	(506)	(1)
Share-based compensation expense	8,902	10,277
Amortization of deferred financing costs	2,580	$ 580
Accretion of original issue discount	2,130
Changes in operating assets and liabilities:
Accounts receivable	212,250	$ (72,889)
Inventory	4,785	(4,572)
Prepaid and other current assets	(19,989)	(2,983)
Accounts payable	(146,699)	57,510
Payroll and related costs and accrued expenses	41,402	9,922
Income taxes payable	(108)	(301)
Other	(3,422)	1,281
Net cash provided by operating activities	103,203	71,723
Cash flows from investing activities:
Purchases of and deposits on property, plant and equipment	(117,304)	(138,816)
Proceeds from disposal of property, plant and equipment	$ 2,211	661
Investment in unconsolidated affiliate		(3,000)
Payments made for business acquisitions, net of cash acquired	$ (706,702)	(33,350)
Net cash used in investing activities	(821,795)	(174,505)
Cash flows from financing activities:
Proceeds from revolving debt	161,000	143,000
Payments on revolving debt	(382,000)	$ (32,000)
Proceeds from term loans	1,001,400
Payments on term loans	(2,650)
Payments of capital lease obligations	(2,257)	$ (1,969)
Financing costs	(48,074)
Proceeds from issuance of common shares for stock options exercised	136	$ 810
Registration costs associated with issuance of common shares	(1,886)
Employee tax withholding on restricted shares vesting	(2,503)	$ (4,254)
Excess tax benefit from share-based award activity	(2,327)	2,096
Net cash provided by financing activities	720,839	107,683
Net increase in cash and cash equivalents	2,247	4,901
Cash and cash equivalents, beginning of period	10,017	14,414
Cash and cash equivalents, end of period	12,264	19,315
Supplemental cash flow disclosure:
Cash paid for interest	24,509	3,306
Cash paid for income taxes	$ 2,159	11,086
Non-cash investing and financing activity
Capital lease obligations		25,636
Change in accrued capital expenditures	$ (32,354)	$ 4,894
Non-cash consideration for business acquisition	$ 735,125