CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Cash and restricted cash	$ 73,191	$ 79,140
Inventories	320,974	323,289
Property, plant and equipment, net	228,381	239,748
Goodwill	185,092	179,241
Other assets	30,662	32,247
Accounts payable	91,085	87,608
Accrued compensation and benefits	68,434	224,230
Accrued expenses and other liabilities	72,131	47,063
Accrued pension and other postretirement benefits	123,401	135,339
Other noncurrent liabilities	$ 16,529	$ 14,101
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	74,451,977	74,093,598
Common stock, shares outstanding	74,451,977	74,093,598
VIE
Cash and restricted cash	$ 15,738	$ 13,811
Inventories	12,922	14,633
Property, plant and equipment, net	10,093	10,709
Goodwill	32,312	32,312
Other assets	2,674	2,642
Accounts payable	7,428	10,397
Accrued compensation and benefits	540	780
Accrued expenses and other liabilities	5,980	4,121
Accrued pension and other postretirement benefits	1,743	1,946
Other noncurrent liabilities	$ 4,065	$ 3,368