Derivative Financial Instruments (Pre-tax Impact of Derivative Instruments as Recorded in Consolidated Statements of Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ (2,356)	$ 1,287	$ (420)
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	(1,387)	(247)	(1,120)
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0
Amount of Gain or (Loss) Recognized in Income on Derivative Not Designated as Hedging Instruments	25	(14)	(162)
Interest rate contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	(2,664)	933	(138)
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0
Interest rate contract | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	(1,495)	(460)	(1,207)
Foreign exchange contract
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	308	354	(282)
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0
Foreign exchange contract | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	108	213	87
Foreign exchange contract | Costs of sales or other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 25	$ (14)	$ (162)