Derivative Instruments - Designated as hedging, Financial Performance (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended				3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Mar. 31, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Mar. 31, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Mar. 31, 2014 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member]	Mar. 31, 2014 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member] Cost of Sales [Member]	Mar. 31, 2013 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member] Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ 1,370	$ 1,060	$ 1,040	$ 1,060			$ 330	$ 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net					$ (240)	$ (10)			$ 40	$ 0