CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ 10,137	$ (9,592)
Adjustments to reconcile net income (loss) to net cash used by operating activities:
Depreciation	30,207	33,081
Amortization	2,021	2,964
Change in fair value to the unit adjustment liability and loss on dilution of equity method investment	0	12,217
Deferred income tax benefit	(221)	(567)
Equity in income of unconsolidated entities, net	0	(3,175)
Dividends from unconsolidated entities	19	16
Other, net	5,131	(9,875)
Changes in assets and liabilities:
Accounts receivable	(27,882)	15,952
Inventories	(755)	(12,408)
Accounts payable	(541)	(15,851)
Accrued interest payable	286	6,668
Accrued compensation	(12,352)	(3,777)
Advances on contracts and other customer advances	(4,998)	(8,995)
Retirement plan liabilities, net	(8,381)	(10,238)
Other assets and liabilities	1,205	605
Net cash used by operating activities	(6,124)	(2,975)
Cash flows from investing activities:
Purchases of property, plant and equipment	(16,989)	(16,951)
Proceeds from sales of assets	1,006	2,819
Purchases of businesses, net of cash acquired	0	(26)
Other investing activities, net	33	5,427
Net cash used by investing activities	(15,950)	(8,731)
Cash flows from financing activities:
Short-term borrowings, net	3,655	(366)
Current maturities and long-term debt:
Additions	24,000	29,010
Reductions	(14,345)	(42,921)
Cash dividends paid on common stock	0	(4,105)
Stock-based compensation - Employee taxes paid	(53)	0
Proceeds from cross-currency interest rate swap termination	0	16,625
Deferred financing costs	(36)	(894)
Net cash provided (used) by financing activities	13,221	(2,651)
Effect of exchange rate changes on cash	1,403	5,006
Net decrease in cash and cash equivalents	(7,450)	(9,351)
Cash and cash equivalents at beginning of period	71,879	79,756
Cash and cash equivalents at end of period	$ 64,429	$ 70,405