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Other Comprehensive Income (Loss) (Components Of Comprehensive Income (Loss) In The Consolidated Statements Of Operations) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total, Before Tax | $ 639,188 | $ 199,401 | $ 304,606 | $ 471,106
Total, Tax Effect | (72,300) | (28,192) | (35,622) | (53,451)
Total, Net of Tax | 566,888 | 171,209 | 268,984 | 417,655
URA(D) On Securities [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Before Tax | 620,926 | 228,053 | 305,725 | 484,683
Tax Effect | (69,173) | (28,872) | (33,371) | (52,263)
Net of Tax | 551,753 | 199,181 | 272,354 | 432,420
Reclassification, Before Tax | (6,849) | (787) | 31,328 | (3,523)
Reclassification, Tax Effect | (408) | (1,082) | (7,186) | (168)
Reclassification, Net of Tax | (7,257) | (1,869) | 24,142 | (3,691)
Total, Net of Tax | 544,496 | 197,312 | 296,496 | 428,729
URA(D) On Securities OTTI [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Before Tax |  | (1,499) |  | (1,743)
Tax Effect |  | 77 |  | 147
Net of Tax |  | (1,422) |  | (1,596)
Total, Net of Tax |  | (1,422) |  | (1,596)
Foreign Currency Translation Adjustment [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Before Tax | 22,825 | (27,823) | (35,898) | (11,225)
Tax Effect | (2,239) | 1,991 | 5,660 | (555)
Net of Tax | 20,586 | (25,832) | (30,238) | (11,780)
Total, Net of Tax | 20,586 | (25,832) | (30,238) | (11,780)
Benefit Plan Net Gain (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Reclassification, Before Tax | 2,286 | 1,457 | 3,451 | 2,914
Reclassification, Tax Effect | (480) | (306) | (725) | (612)
Reclassification, Net of Tax | 1,806 | 1,151 | 2,726 | 2,302
Total, Net of Tax | $ 1,806 | $ 1,151 | $ 2,726 | $ 2,302

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