CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Cash and restricted cash	$ 72,738	$ 79,140
Inventories	314,155	323,289
Property, plant and equipment, net	234,401	239,748
Goodwill	182,136	179,241
Other assets	30,959	32,247
Accounts payable	95,388	87,608
Accrued compensation and benefits	57,553	224,230
Accrued expenses and other liabilities	68,212	47,063
Accrued pension and postretirement benefits	137,434	135,339
Other noncurrent liabilities	$ 15,366	$ 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	$ 18,111	$ 13,811
Inventories	10,100	14,633
Property, plant and equipment, net	10,487	10,709
Goodwill	32,312	32,312
Other assets	2,622	2,642
Accounts payable	7,259	10,397
Accrued compensation and benefits	180	780
Accrued expenses and other liabilities	5,078	4,121
Accrued pension and postretirement benefits	1,958	1,946
Other noncurrent liabilities	$ 3,578	$ 3,368