Fair Value Measurements (Details) - Fair value, measurements, recurring - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation assets	$ 48,238	$ 41,797
Foreign exchange contracts, net	2,767
Interest rate swap contracts	186
Total assets at fair value	51,191	41,797
Commodity contracts, net	(354)	(4,609)
Foreign exchange contracts, net		(2,570)
Non-qualified deferred compensation liabilities	(48,238)	(41,797)
Total liabilities at fair value	(48,592)	(48,976)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation assets	48,238	41,797
Foreign exchange contracts, net	0
Interest rate swap contracts	0
Total assets at fair value	48,238	41,797
Commodity contracts, net	0	0
Foreign exchange contracts, net		0
Non-qualified deferred compensation liabilities	(48,238)	(41,797)
Total liabilities at fair value	(48,238)	(41,797)
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation assets	0	0
Foreign exchange contracts, net	2,767
Interest rate swap contracts	186
Total assets at fair value	2,953	0
Commodity contracts, net	(354)	(4,609)
Foreign exchange contracts, net		(2,570)
Non-qualified deferred compensation liabilities	0	0
Total liabilities at fair value	(354)	(7,179)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation assets	0	0
Foreign exchange contracts, net	0
Interest rate swap contracts	0
Total assets at fair value	0	0
Commodity contracts, net	0	0
Foreign exchange contracts, net		0
Non-qualified deferred compensation liabilities	0	0
Total liabilities at fair value	$ 0	$ 0