Fair Value of Financial Instruments Gains (lossses) on Cash Flow Hedges Reported in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Unrealized Gain (Loss) on Foreign Currency Derivatives, Net, before Tax	$ 3,812	$ 2,149
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	0	443
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 3,812	$ 2,592