Derivative Financial Instruments (Pre-tax Impact of Derivative Instruments as Recorded in Consolidated Statements of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	$ (325)	$ (934)	$ (2,356)
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	(1,176)	(600)	(1,387)
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	0	0	25
Interest rate swap agreements
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	(57)	(1,922)	(2,664)
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0
Interest rate swap agreements | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	(1,187)	(1,460)	(1,495)
Foreign currency exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in AOCI on Derivative (Effective Portion)	(268)	988	308
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0
Foreign currency exchange contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	11	860	108
Foreign currency exchange contracts | Costs of sales or other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 0	$ 0	$ 25