Property, Plant and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Land	$ 174,654,000	$ 181,026,000
Buildings	646,098,000	609,907,000
Leasehold improvements	76,389,000	75,925,000
Machinery and equipment	1,809,037,000	1,704,160,000
Construction in progress	34,587,000	56,069,000
Property, plant and equipment, gross	2,740,765,000	2,627,087,000
Less accumulated depreciation	(1,568,169,000)	(1,411,040,000)
Total	1,172,596,000	1,216,047,000
Depreciation expense	$ 156,500,000	$ 161,800,000	$ 168,400,000