Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Net Income	$ 30,075	$ 25,182
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,511	11,291
Loss (gain) on disposal of property and equipment	50	(136)
Share-based compensation	1,621	1,123
Provision for bad debts	1,044	905
Excess tax benefit on stock-based compensation	(1,191)	(1,366)
Deferred tax provision	1,366	3,234
Changes in:
Accounts receivable	(27,968)	(36,769)
Prepaid expenses and other assets	2,392	615
Accounts payable	(5,502)	885
Accrued expenses and other liabilities	2,565	(1,460)
Net cash provided by operating activities	19,963	3,504
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(87)	(100,810)
Capital expenditures	(27,714)	(20,463)
Proceeds from sale of buildings and equipment	1,996	2,843
Net cash used in investing activities	(25,805)	(118,430)
Cash flows from financing activities:
Borrowings under revolving credit facilities	96,807	184,868
Payments under revolving credit facilities	(91,807)	(62,019)
Long-term debt payments	(5,000)	(4,375)
Debt issuance cost	(8)	108
Payments of contingent earnouts	3,317	4,804
Proceeds from Issuance of Common Stock, net of issuance costs	3,150	2,727
Excess tax benefit from share-based compensation	1,191	1,366
Reduction of capital lease obligation	(56)	(42)
Net cash provided by financing activities	960	117,829
Net (decrease) increase in cash and cash equivalents	(4,882)	2,903
Cash and cash equivalents:
Beginning of period	11,345	5,438
End of period	6,463	8,341
Supplemental cash flow information:
Cash paid for interest	7,897	4,425
Cash paid for income taxes, net	9,080	6,914
Capital Lease Obligations Incurred	$ 6,476
Noncash capital expenditures		$ 1,018