Derivative Instruments - Designated as hedging, Financial Performance (Details) (USD $) In Thousands, unless otherwise specified							3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Jun. 30, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Jun. 30, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Jun. 30, 2014 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member]	Jun. 30, 2014 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member] Cost of Sales [Member]	Jun. 30, 2013 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member] Cost of Sales [Member]	Jun. 30, 2014 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member] Cost of Sales [Member]	Jun. 30, 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	$ 840	$ 1,060	$ 3,070	$ (1,680)	$ 570	$ 1,060					$ 270	$ 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net							$ (250)	$ (310)	$ (490)	$ (320)			$ 170	$ 0	$ 210	$ 0