Significant Accounting Policies Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Debt and Capital Lease Obligations	$ 532,404	$ 461,476
Fair value, measurements, recurring
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Foreign exchange contracts, net		2,767
Derivative Asset		186
Total assets at fair value	49,806	51,191
Foreign exchange contracts, net	(8,682)
Total liabilities at fair value	(58,488)	(48,592)
Fair value, measurements, recurring | Commodity contracts
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Commodity contracts, net		(354)
Level 1 | Fair value, measurements, recurring
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Total assets at fair value	49,806	48,238
Total liabilities at fair value	(49,806)	(48,238)
Level 2 | Fair value, measurements, recurring
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Foreign exchange contracts, net		2,767
Derivative Asset		186
Total assets at fair value	0	2,953
Foreign exchange contracts, net	(8,682)
Total liabilities at fair value	(8,682)	(354)
Level 2 | Fair value, measurements, recurring | Commodity contracts
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Commodity contracts, net		(354)
Supplemental Employee Retirement Plans, Defined Benefit | Fair value, measurements, recurring
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Non-qualified deferred compensation assets	49,806	48,238
Non-qualified deferred compensation liabilities	(49,806)	(48,238)
Supplemental Employee Retirement Plans, Defined Benefit | Level 1 | Fair value, measurements, recurring
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Non-qualified deferred compensation assets	49,806	48,238
Non-qualified deferred compensation liabilities	(49,806)	(48,238)
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term Debt, Fair Value	555,100	477,900
Reported Value Measurement [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Debt and Capital Lease Obligations	$ 532,400	$ 461,500