Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income (loss)	$ 752	$ (5,148)
Adjustments to reconcile from net income (loss) to net cash provided by (used for) operating activities:
Depreciation, depletion and amortization	11,559	12,597
Amortization of deferred financing fees	790	270
Deferred income taxes	2,892	(248)
Other	(6,922)	7,569
Working capital changes:
Accounts receivable	89,406	31,466
Inventories	(12,785)	(3,723)
Other current assets	(1,860)	(1,576)
Accounts payable	(16,465)	(33,695)
Other current liabilities	(10,814)	(16,172)
Income taxes receivable/payable	(6,672)	(12,752)
Net cash provided by (used for) for operating activities	49,881	(21,412)
Investing activities
Expenditures for property, plant and equipment	(4,152)	(41,180)
Other	1,088	380
Net cash used for investing activities	(3,064)	(40,800)
Financing activities
Additions to long-term debt	2,047	1,553
Reductions of long-term debt	(728)	(1,710)
Net additions (reductions) to revolving credit agreements	(70,153)	46,063
Cash dividends paid	(3,688)	(3,957)
Purchase of treasury shares	(16,009)	(14,247)
Other	(42)	2
Net cash provided by (used for) financing activities	(88,573)	27,704
Effect of exchange rate changes on cash	(56)	25
Cash and cash equivalents
Decrease for the period	(41,812)	(34,483)
Balance at the beginning of the period	61,135	95,390
Balance at the end of the period	$ 19,323	$ 60,907