CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net (loss) income	$ (3,056)	$ 21,504
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Gain on divestiture	(1,459)	0
Depreciation and amortization	24,001	14,248
Deferred income taxes	(12,358)	1,165
Pension plan settlement expense	25,515	0
Stock-based compensation	1,475	2,580
Income from equity method investment	(22)	(56)
Changes in operating assets and liabilities:
Accounts receivable	(1,988)	(11,934)
Contract assets	1,231	(7,594)
Inventories	(4,660)	(15,643)
Accounts payable	10,227	7,406
Accrued payroll and other compensation	3,000	(2,408)
Accrued taxes	308	1,184
Other, net	(5,995)	(2,478)
Net cash provided by operating activities	36,219	7,974
Cash flows from investing activities:
Capital expenditures	(20,287)	(16,355)
Proceeds from divestiture	2,298	0
Proceeds from the sale of property, plant and equipment	295	217
Business acquisitions, net of cash acquired	869	0
Net cash used for investing activities	(16,825)	(16,138)
Cash flows from financing activities:
Debt repayments	(25,169)	(126)
Common stock issued	0	666
Common stock repurchased	(43)	(823)
Net cash used for financing activities	(25,212)	(283)
Effect of exchange rate changes on cash	(3)	(815)
Decrease in cash and cash equivalents	(5,821)	(9,262)
Cash and cash equivalents at beginning of period	49,237	59,875
Cash and cash equivalents at end of period	$ 43,416	$ 50,613