Restructuring Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended			15 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Costs incurred and charged to expense	$ 49,090	$ (7,263)	$ 49,482
Restructuring Reserve, Current	26,200	25,200		$ 25,200
Restructuring Reserve, Noncurrent	21,800	$ 4,400		4,400
2014 Project [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	0
Costs incurred and charged to expense	$ 1,296			$ 47,182
2013 Project [Member]
Restructuring Cost and Reserve [Line Items]
Costs incurred and charged to expense					$ 26,200