Fair Value Measurements (Details) (Fair value, measurements, recurring, USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Commodity Contract Asset, Current		$ 30
Assets, fair value disclosure	41,166	24,741
Foreign Currency Contracts, Liability, Fair Value Disclosure	(1,608)	(9)
Liabilities, Fair Value Disclosure, Recurring	(42,774)	(24,720)
Level 1
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets, fair value disclosure	41,166	24,711
Liabilities, Fair Value Disclosure, Recurring	(41,166)	(24,711)
Level 2
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Commodity Contract Asset, Current		30
Assets, fair value disclosure		30
Foreign Currency Contracts, Liability, Fair Value Disclosure	(1,608)	(9)
Liabilities, Fair Value Disclosure, Recurring	(1,608)	(9)
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Deferred Compensation Plan Assets	41,166	24,711
Deferred Compensation Liability, Current and Noncurrent	(41,166)	(24,711)
Supplemental Employee Retirement Plans, Defined Benefit [Member] | Level 1
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Deferred Compensation Plan Assets	41,166	24,711
Deferred Compensation Liability, Current and Noncurrent	$ (41,166)	$ (24,711)