Effect of Cash Flow Derivatives on the Balance Sheet and Income Statement, Before Tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	$ 3,453	$ (175)	$ 6,327	$ 2,198
Interest Rate Swap [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	13	302	(987)	2,062
Interest Rate Swap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	359	314	1,278	649
Interest Rate Cap [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	356	(220)	646	149
Interest Rate Cap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	252	(149)	849	(685)
Foreign Exchange Option [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	1,011	0	1,229	0
Foreign Exchange Option [Member] | Cost of Sales [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	289	0	451	0
Currency Swap 1 [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	2,703	599	4,126	2,975
Currency Swap 2 [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Amount of Gain (Loss) Recognized in OCI on Derivative	0	0	0	0
Currency Swap [Member] | Interest Expense [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	387	363	1,297	570
Currency Swap [Member] | Other Income (Expense) [Member]
Derivative Instruments Designated as Hedging Instruments [Abstract]
Gain (Loss) Reclassified from AOCI into Income	$ 2,168	$ (733)	$ 2,453	$ 1,635