Derivative Financial Instruments (Derivatives And Hedging-Cash Flow Hedges) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Net gain (loss) on cash flow hedges | $ (6,659) | $ 1,697 | $ (11,035) | $ 7,111 |
| 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 | (6,659) | 1,697 | (11,035) | 7,111 |
| 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 | $ (601) | $ (739) | $ (1,228) | $ (1,479) |