CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net income	$ 30,148	$ 52,093
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44,061	44,364
Deferred income taxes	5,261	3,182
Income from discontinued operations	(32)	(403)
Restructuring charges	6,845	999
Legal settlement	8,500
Impairment recoveries		(35)
Gains on dispositions of property and other assets	(938)	(135)
Share-based compensation expense	6,448	5,056
Multi-employer pension plan withdrawal	15,508
Other non-cash items, net	2,772	3,553
Change in operating assets and liabilities (excluding the impact of acquisitions):
Receivables	(37,028)	(21,289)
Inventories	389	(2,792)
Current contract costs	(13,929)	(11,928)
Accounts payable	20,121	12,972
Accrued compensation	2,308	(12,275)
Contract liabilities	29,177	28,045
Payments on operating lease obligations	(20,853)
Other assets and liabilities, net	2,382	203
Net cash provided by operating activities	101,140	101,610
Cash flows from investing activities
Capital expenditures	(60,868)	(64,968)
Cash paid for acquired businesses, net	(90,992)	(4,628)
Proceeds from dispositions of property and other assets	1,022	1,320
Net cash used in investing activities	(150,838)	(68,276)
Cash flows from financing activities
Proceeds from borrowings	170,459	101,336
Payments on debt and finance lease obligations	(99,340)	(113,429)
Dividends paid on common stock	(6,060)	(6,128)
Payment of payroll taxes on stock-based compensation through shares withheld or repurchased	(3,019)	(1,179)
Common stock purchased for treasury		(9,061)
Proceeds from exercise of stock options	92	84
Net cash provided by (used in) financing activities	62,132	(28,377)
Effect of exchange rate changes on cash and cash equivalents	(689)	(3,210)
Net change in cash and cash equivalents	11,745	1,747
Cash and cash equivalents, beginning of year	44,893	53,723
Cash and cash equivalents, end of period	$ 56,638	$ 55,470