Property, Plant and Equipment (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment
Depreciation expense	$ 274,400,000	$ 233,400,000	$ 215,400,000
Accounts payable for purchases of property and equipment	$ 2,400,000	38,500,000	$ 19,700,000
Change in accounting principle, property plant and equipment estimated useful life	18 months
Increase in the cost of revenues	$ 41,919,000
Change in accounting principle remaining net book value of components		16,406,000
Change in accounting principle loss on disposition		$ 21,408,000