Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities
Net income	$ 4,978	$ 2,802
Adjustments to reconcile from net income to net cash used for operating activities:
Depreciation, depletion and amortization	4,488	4,192
Amortization of deferred financing fees	148	157
Deferred income taxes	2,047	8,425
Other	(7,592)	(1,973)
Working capital changes:
Accounts receivable	29,974	35,095
Inventories	(1,651)	632
Other current assets	(2,722)	(2,207)
Accounts payable	(41,454)	(12,580)
Other current liabilities	(30,420)	(38,362)
Net cash used for operating activities	(42,204)	(3,819)
Investing activities
Expenditures for property, plant and equipment	(4,650)	(4,359)
Other	814	18
Net cash used for investing activities	(3,836)	(4,341)
Financing activities
Additions to long-term debt	5,461	137
Reductions of long-term debt	(432)	(2,772)
Net additions (reductions) to revolving credit agreements	18,263	(4,195)
Cash dividends paid	(1,827)	(1,804)
Net cash provided by (used for) financing activities	21,465	(8,634)
Effect of exchange rate changes on cash	353	13
Cash and cash equivalents
Decrease for the period	(24,222)	(16,781)
Balance at the beginning of the period	80,648	52,499
Balance at the end of the period	$ 56,426	$ 35,718