Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities:
Net income (loss)	$ (13,405)	$ 7,743
Share-based compensation	7,073	9,351
Depreciation and amortization	35,951	42,244
Loss on disposal of property, plant and equipment	52	674
Bad debt expense	284
Loss on extinguishment of debt	4,642
Amortization of bank debt fees	3,428	10,858
Deferred income taxes	4,190	12,198
Changes in operating assets and liabilities, excluding acquired amounts:
Receivables	26,202	46,034
Other assets	(3,296)	19,890
Accounts payable, trade	2,777	(22,113)
Accrued employment costs	30,413	(34,369)
Accrued expenses	(5,930)	(1,762)
Advance payments and billings in excess of costs incurred	(12,372)	3,658
Other liabilities	4,735	(33,870)
Net cash provided by operating activities	84,744	60,536
Investing activities:
Acquisitions, net of cash acquired		25,478
Capital expenditures	(17,942)	(12,600)
Net cash (used in) provided by investing activities	(17,942)	12,878
Financing activities:
Gross borrowings from issuance of long-term debt	1,180,000	585,000
Repayment of long-term debt	(1,199,018)	(376,553)
Gross borrowings from revolving credit facility	73,000	157,000
Repayments of revolving credit facility	(73,000)	(115,000)
Debt issuance costs	(9,988)	(42,425)
Equity issuance costs		(2,590)
Proceeds from share-based payment arrangements	214	279
Payment of employee withholding taxes on share-based compensation	(1,777)	(8,017)
Excess tax deduction on share-based compensation		5,061
Dividends paid	(1,703)	(204,300)
Distributions to non-controlling interest member	(3,865)	(3,094)
Net cash used in financing activities	(36,137)	(4,639)
Net change in cash and cash equivalents	30,665	68,775
Cash and cash equivalents, beginning of period	30,022	7,123
Cash and cash equivalents, end of period	$ 60,687	$ 75,898