CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 3,890	$ 11,054
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Depreciation and amortization	11,935	7,220
Deferred income taxes	(260)	601
Stock-based compensation	982	1,201
Loss from equity method investment	27	4
Changes in operating assets and liabilities:
Accounts receivable	(11,395)	(18,626)
Contract assets	447	(5,745)
Inventories	(6,617)	(8,796)
Accounts payable	15,498	9,471
Accrued payroll and other compensation	2,443	(2,432)
Accrued taxes	396	877
Other, net	(2,976)	1,209
Net cash provided by (used for) operating activities	14,370	(3,962)
Cash flows from investing activities:
Capital expenditures	(9,239)	(7,676)
Proceeds from the sale of property, plant and equipment	256	0
Net cash used for investing activities	(8,983)	(7,676)
Cash flows from financing activities:
Debt repayments	(7,067)	(57)
Common stock issued	0	666
Common stock repurchased	(43)	(823)
Net cash used for financing activities	(7,110)	(214)
Effect of exchange rate changes on cash	360	1,080
Decrease in cash and cash equivalents	(1,363)	(10,772)
Cash and cash equivalents at beginning of period	49,237	59,875
Cash and cash equivalents at end of period	$ 47,874	$ 49,103