Shareholders' Equity Gains and Losses, Net of Tax Reclassified from Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Location of Gain (Loss) Reclassified from Accumulated OCI into Income	$ (5,469)	$ (694)
Foreign currency contracts | Other (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Location of Gain (Loss) Reclassified from Accumulated OCI into Income	(5,641)	(1,671)
Foreign currency contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Location of Gain (Loss) Reclassified from Accumulated OCI into Income	$ 172	$ 977