Significant Accounting Policies Fair Value Measurements (Details) - Fair value, measurements, recurring - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Foreign exchange contracts, net	$ 3,143
Interest rate swap contracts	594
Total assets at fair value	53,400	$ 41,797
Commodity contracts, net	(1,743)
Foreign exchange contracts, net		(2,570)
Total liabilities at fair value	(51,406)	(48,976)
Commodity contracts
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Commodity contracts, net		(4,609)
Level 1
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total assets at fair value	49,663	41,797
Total liabilities at fair value	(49,663)	(41,797)
Level 2
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Foreign exchange contracts, net	3,143
Total assets at fair value	3,737	0
Commodity contracts, net	(1,743)
Foreign exchange contracts, net		(2,570)
Total liabilities at fair value	(1,743)	(7,179)
Level 2 | Commodity contracts
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Commodity contracts, net		(4,609)
Supplemental Employee Retirement Plans, Defined Benefit
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Non-qualified deferred compensation assets	49,663	41,797
Non-qualified deferred compensation liabilities	(49,663)	(41,797)
Supplemental Employee Retirement Plans, Defined Benefit | Level 1
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Non-qualified deferred compensation assets	49,663	41,797
Non-qualified deferred compensation liabilities	$ (49,663)	$ (41,797)