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Fair Value (Reconciliation Of Financial Instruments Classified As Level 3) (Details) - Derivative Financial Instruments, net Liabilities [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Balance $ 3,046 $ 2,454
Unrealized gain recognized in earnings   24
Unrealized gain recognized in earnings 53  
Issuances 2,846 9,295
Settlements (5,081) (8,727)
Ending balance $ 864 $ 3,046