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v3.20.2

Revisions To Financial Statements (Schedule Of Prior Period Financial Statements - Stockholder's Equity) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |
Balance |  | $ 9,132,925 |  |  | $ 9,132,925 |
Net income (loss) | $ 190,880 |  | $ 332,868 |  | 207,492 | $ 687,419
Balance | 9,286,299 |  | 8,836,817 |  | 9,286,299 | 8,836,817
Retained Earnings [Member] |  |  |  |  |  |
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |
Balance | 10,255,692 | 10,306,571 | 9,828,847 | $ 9,531,433 | 10,306,571 | 9,531,433
Net income (loss) | 190,880 | 16,612 | 332,868 | 354,551 |  |
Balance | $ 10,384,645 | $ 10,255,692 | 10,104,716 | 9,828,847 | $ 10,384,645 | 10,104,716
As Previously Reported [Member] |  |  |  |  |  |
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |
Net income (loss) |  |  | 342,855 |  |  | 691,755
Balance |  |  | 8,884,160 |  |  | 8,884,160
As Previously Reported [Member] | Retained Earnings [Member] |  |  |  |  |  |
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |
Balance |  |  | 9,866,203 | 9,574,440 |  | 9,574,440
Net income (loss) |  |  | 342,855 | 348,900 |  |
Balance |  |  | 10,152,059 | 9,866,203 |  | 10,152,059
Impact of Revisions [Member] |  |  |  |  |  |
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |
Net income (loss) |  |  | (9,987) |  |  | (4,336)
Balance |  |  | (47,343) |  |  | (47,343)
Impact of Revisions [Member] | Retained Earnings [Member] |  |  |  |  |  |
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |
Balance |  |  | (37,356) | (43,007) |  | (43,007)
Net income (loss) |  |  | (9,987) | 5,651 |  |
Balance |  |  | $ (47,343) | $ (37,356) |  | $ (47,343)

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