Derivative Financial Instruments (Derivative Gains Included In Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Derivative Gains Included in AOCI [Roll Forward] | ||||
| Beginning balance | $ 2,454,738 | $ 2,637,779 | $ 2,715,028 | $ 2,643,434 |
| Net gain (loss) on cash flow hedges | 0 | (14,181) | (10,444) | (25,216) |
| Reclassification of net loss (gain) on cash flow hedges to income | 896 | 699 | 2,552 | 1,927 |
| Ending balance | 2,388,444 | 2,674,456 | 2,388,444 | 2,674,456 |
| Derivative Losses Included in AOCL | ||||
| Derivative Gains Included in AOCI [Roll Forward] | ||||
| Beginning balance | (57,748) | (36,287) | (48,960) | (26,480) |
| Ending balance | $ (56,852) | $ (49,769) | $ (56,852) | $ (49,769) |