Property, Plant and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Operating Leases, Rent Expense	$ 11,200,000	$ 16,700,000	$ 14,100,000
Property, plant and equipment
Land	1,752,000	1,764,000
Building improvements	647,181,000	855,318,000
Capitalized leases for machinery, equipment and buildings	28,680,000	16,133,000
Property, plant and equipment, gross	677,613,000	873,215,000
Accumulated depreciation and amortization	(464,852,000)	(395,520,000)
Property Plant and Equipment Net before Construction in Progress	212,761,000	477,695,000
Construction in Progress	15,150,000	8,578,000
Property, plant and equipment, net	$ 227,911,000	$ 486,273,000