Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities:
Net income	$ 18,307	$ 23,048
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	7,058	7,748
Allowance for accounts receivable	3,396	3,829
Non-cash amortization of debt financing costs	685	701
Shared-based compensation expense	1,479	1,517
Deferred income taxes	2,906	6,676
Non-cash loss / (gain) on derivative contracts	1,823	(2,161)
Change in other operating items:
Accounts receivable	(26,552)	(47,334)
Inventories	(462)	7,010
Prepaid expenses	(5,491)	(3,766)
Accounts payable	6,563	2,845
Other operating activities, net	(1,061)	788
Net cash provided by operating activities	8,651	901
Cash Flows from Investing Activities:
Purchases of property, plant and equipment	(12,702)	(5,158)
Proceeds from disposal/sale of property, plant and equipment	20	0
Net cash used in investing activities	(12,682)	(5,158)
Cash Flows from Financing Activities:
Borrowing of Revolving Credit Facility	0	80,500
Repayment of Revolving Credit Facility	0	(80,500)
Repayment of Term Loan	(6,338)	(2,188)
Other financing activities	(222)	0
Net cash used in financing activities	(6,560)	(2,188)
Effect of Foreign Currency Exchange Rate Changes on Cash	199	(1,125)
Net Decrease in Cash	(10,392)	(7,570)
Cash:
Beginning of period	70,913	52,244
End of period	60,521	44,674
Supplemental Cash Flow Information:
Cash paid for interest	6,787	6,937
Cash paid for income taxes, net	4,180	1,693
Unpaid purchases of property and equipment included in accounts payable	$ 526	$ 416