Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Net Income	$ 35,866	$ 39,595
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	24,448	18,189
Gain on disposal of property and equipment	(205)	(195)
Share-based compensation	2,044	1,750
Provision for bad debts	1,852	2,268
Excess tax benefit on stock-based compensation	(1,175)	(1,442)
Deferred tax provision	2,054	5,229
Changes in:
Accounts receivable	(3,340)	(55,317)
Prepaid expenses and other assets	(7,287)	(7,238)
Accounts payable	(9,936)	19,356
Accrued expenses and other liabilities	(1,859)	(4,643)
Net cash provided by operating activities	42,462	17,552
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(32,364)	(232,026)
Capital expenditures	(43,206)	(30,556)
Proceeds from sale of buildings and equipment	5,313	3,778
Net cash used in investing activities	(70,257)	(258,804)
Cash flows from financing activities:
Borrowings under revolving credit facilities	154,127	341,165
Payments under revolving credit facilities	(231,127)	(117,099)
Long-term debt borrowings	110,000	33,750
Long-term debt payments	(5,000)	(6,875)
Debt issuance cost	(2,713)	(2,447)
Payments of contingent earnouts	3,317	4,804
Proceeds from Issuance of Common Stock, net of issuance costs	2,857	3,414
Excess tax benefit from share-based compensation	1,175	1,442
Reduction of capital lease obligation	(481)	(66)
Net cash provided by financing activities	25,521	248,480
Net (decrease) increase in cash and cash equivalents	(2,274)	7,228
Cash and cash equivalents:
Beginning of period	11,345	5,438
End of period	9,071	12,666
Supplemental cash flow information:
Cash paid for interest	11,685	7,719
Cash paid for income taxes, net	12,078	14,759
Capital Lease Obligations Incurred	6,399	0
Non-cash contingent earnout	$ 4,114	$ 0