Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ (9,144)	$ (405)
Depreciation and amortization	141,816	137,136
Other operating activities and non-cash items	(7,890)	(3,944)
Changes in assets and liabilities	(22,105)	5,311
Net cash provided by operating activities	102,677	138,098
Cash flows from investing activities:
Payments for property, plant and equipment	(88,285)	(198,788)
Proceeds from sale of property, plant and equipment	1,835	121
Other investing activities	(2,492)	(426)
Net cash used in investing activities	(88,942)	(199,093)
Cash flows from financing activities:
Payments under revolving credit facilities	0	(40,000)
Borrowings under short-term debt	13,275	0
Payments of short-term debt	(14,073)	(11,901)
Proceeds from issuance of long-term debt	50,000	0
Payments of long-term debt	(3,295)	(4,204)
Payments for debt issuance costs	(156)	(156)
Payment of deferred consideration for purchase of facility	(3,890)	0
Payments for capital lease obligations	(913)	(401)
Proceeds from the issuance of stock through share-based compensation plans	145	0
Payments of tax withholding for restricted shares	(210)	(119)
Payments of subsidiary dividends to non-controlling interests	(135)	(135)
Net cash provided by (used in) financing activities	40,748	(56,916)
Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash	10,259	8,250
Net increase (decrease) in cash, cash equivalents and restricted cash	64,742	(109,661)
Cash, cash equivalents and restricted cash, beginning of period	555,495	527,348
Cash, cash equivalents and restricted cash, end of period	620,237	417,687
Non-cash investing and financing activities:
Property, plant and equipment included in capital expenditures payable	$ 211,410	$ 199,944