Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net income (loss)	$ 5,918	$ 752
Adjustments to reconcile from net income to net cash provided by operating activities:
Depreciation, depletion and amortization	8,708	11,559
Amortization of deferred financing fees	314	790
Deferred income taxes	12,016	2,892
Other	(1,871)	(6,922)
Working capital changes:
Accounts receivable	32,559	89,406
Inventories	(2,768)	(12,785)
Other current assets	115	(1,860)
Accounts payable	(1,227)	(16,465)
Income taxes receivable/payable	(9,972)	(6,672)
Other current liabilities	(26,823)	(10,814)
Net cash provided by operating activities	16,969	49,881
Investing activities
Expenditures for property, plant and equipment	(8,694)	(4,152)
Proceeds from the sale of property, plant, and equipment	2,630	1,479
Other	(2,542)	(391)
Net cash used for investing activities	(8,606)	(3,064)
Financing activities
Additions to long-term debt	0	2,047
Reductions of long-term debt	(16,623)	(728)
Net reductions to revolving credit agreements	(2,207)	(70,153)
Cash dividends paid	(3,638)	(3,688)
Purchase of treasury shares	(3,826)	(16,009)
Other	(202)	(42)
Net cash used for financing activities	(26,496)	(88,573)
Effect of exchange rate changes on cash	(109)	(56)
Cash and cash equivalents
Decrease for the period	(18,242)	(41,812)
Balance at the beginning of the period	52,499	61,135
Balance at the end of the period	$ 34,257	$ 19,323