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	$ 1,950	$ 10,317
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	23,331	24,353
Income tax, non-cash changes	(1,719)	(8,454)
Stock-based compensation	504	731
Amortization of debt issuance costs	953	965
Other non-cash items	2,291	922
Accounts receivable	(31,270)	(33,216)
Inventories	7,463	(6,300)
Other assets and liabilities	9,680	2,969
Accounts payable	5,287	12,634
Income taxes	10,221	9,440
NET CASH PROVIDED BY OPERATING ACTIVITIES	28,691	14,361
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant and equipment	(13,392)	(22,674)
Other investing activities	1,461	(17)
NET CASH USED IN INVESTING ACTIVITIES	(11,931)	(22,691)
CASH FLOWS FROM FINANCING ACTIVITIES:
Debt repayment	(1,000)	(1,819)
Cash dividends paid	(6,128)	(9,452)
Purchase of non-controlling redeemable shares	(1,411)
Payments related to tax withholdings for stock-based compensation	(108)	(607)
Proceeds from borrowings on revolving credit facility	25,000	26,100
Repayments of borrowings on revolving credit facility	(25,000)	(26,100)
NET CASH USED IN FINANCING ACTIVITIES	(8,647)	(11,878)
Effect of exchange rate changes on cash	(1,938)	(2,818)
Net increase (decrease) in cash and cash equivalents	6,175	(23,026)
Cash and cash equivalents at the beginning of the period	47,464	46,360
Cash and cash equivalents at the end of the period	$ 53,639	$ 23,334