Derivative Financial Instruments (Derivatives And Hedging-Cash Flow Hedges) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Net gain (loss) on cash flow hedges | $ (14,181) | $ 6,852 | $ (25,216) | $ 13,963 |
| Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] | ||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Net gain (loss) on cash flow hedges | (14,181) | 6,852 | (25,216) | 13,963 |
| Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Interest Expense [Member] | ||||
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net | $ (699) | $ (740) | $ (1,927) | $ (2,219) |