Derivative Instruments (Current Period Cash Flow Hedges in AOCI (loss) before Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cumulative effect of adoption		$ 42
Cash flow hedges in AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance, beginning	$ (3,849)	(25,851)	$ 11,745
Amount recorded in AOCI	10,574	42,763	(39,434)
Amount reclassified into current period earnings	(7,054)	(20,761)	1,838
Balance, ending	(287)	(3,849)	(25,851)
Currency/Interest Rate | Accumulated Gain (Loss), Net, Cash Flow Hedge
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount recorded in AOCI	10,574	42,763	(39,434)
Amount reclassified into current period earnings	$ (7,054)	$ (20,761)	$ 1,838