Derivative Instruments - Designated as hedging, Financial Performance (Details) (USD $) In Thousands, unless otherwise specified							3 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member]	Sep. 30, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Sep. 30, 2014 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Designated as Hedging Instrument [Member] Interest Expense [Member]	Sep. 30, 2014 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2013 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member]	Sep. 30, 2014 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member] Cost of Sales [Member]	Sep. 30, 2013 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member] Cost of Sales [Member]	Sep. 30, 2014 Foreign Exchange Contract [Member] Designated as Hedging Instrument [Member] Cost of Sales [Member]	Sep. 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	$ 1,090	$ 1,060	$ 2,270	$ (1,680)	$ 1,010	$ 1,060					$ 80	$ 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net							$ (240)	$ (240)	$ (730)	$ (560)			$ 150	$ 0	$ 370	$ 0