Derivative Instruments (Current Period Cash Flow Hedges in AOCI (loss) before Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cumulative Effect of New ASU in Period of Adoption			$ 42
Cash flow hedges in AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Balance, beginning	$ (287)	$ (3,849)	(25,851)
Amount recorded in AOCI	(47,479)	10,574	42,763
Amount reclassified into current period earnings	4,766	(7,054)	(20,761)
Balance, ending	(43,000)	(287)	(3,849)
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	(47,479)	10,574	42,763
Amount reclassified into current period earnings	$ 4,766	$ (7,054)	$ (20,761)