Derivative Financial Instruments (Derivatives And Hedging-Cash Flow Hedges) (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Net gain (loss) on cash flow hedges | $ (4,376) | $ 5,414 |
| 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 | (4,376) | 5,414 |
| 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 | $ (627) | $ (740) |