CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net loss	$ (18,221)	$ (9,835)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	13,188	13,063
Deferred income taxes	(9,098)	(4,507)
(Income) loss from discontinued operations	287	(928)
Restructuring charges	688	162
Legal settlement	8,500
Gains on dispositions of property and other assets	(551)	(73)
Share-based compensation expense	2,206	717
Other non-cash items, net	1,041	1,803
Change in operating assets and liabilities (excluding the impact of acquisitions):
Receivables	(25,545)	(13,255)
Inventories	(874)	70
Current contract costs	(4,838)	(9,211)
Accounts payable	12,868	5,354
Restructuring liabilities	(714)	(359)
Accrued compensation	(7,490)	(16,149)
Contract liabilities	32,379	20,888
Income taxes payable	6	(7,475)
Other assets and liabilities, net	4,188	16,316
Net cash provided by (used in) operating activities	8,020	(3,419)
Cash flows from investing activities
Capital expenditures	(19,543)	(26,586)
Proceeds from dispositions of property and other assets	611	1,139
Net cash used in investing activities	(18,932)	(25,447)
Cash flows from financing activities
Proceeds from borrowings	28,347	36,038
Payments on debt and finance lease obligations	(14,376)	(15,348)
Dividends paid on common stock	(2,028)	(2,046)
Payment of payroll taxes on stock-based compensation through shares withheld	(2,905)	(868)
Proceeds from exercise of stock options		84
Net cash provided by financing activities	9,038	17,860
Effect of exchange rate changes on cash and cash equivalents	454	(377)
Net change in cash and cash equivalents	(1,420)	(11,383)
Cash and cash equivalents, beginning of year	44,893	53,723
Cash and cash equivalents, end of period	$ 43,473	$ 42,340