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Comprehensive Income (Components of Comprehensive Income-Gross and Net of Tax) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Net income, Gross | $ 135,632 | $ 15,997
Unrealized holding losses during the period, Gross | (103,308) | (93,981)
Unrealized losses on securities with credit loss recognized in earnings; Gross | (11,320) | (65,390)
Amounts reclassified into net income: HTM securities, Gross | (2) | 25
Amounts reclassified into net income: Net realized losses on disposals and losses on intent-to-sell AFS securities, Gross | 604 | 11,327
Amounts reclassified into net income: Credit loss expense, Gross | 4,997 | 15,787
Total unrealized losses on investment securities, Gross | (109,029) | (132,232)
Amount reclassified into net income: Net actuarial loss, Gross | 693 | 754
Total defined benefit pension and post-retirement benefit plans, Gross | 693 | 754
Other comprehensive loss, Gross | (108,336) | (131,478)
Comprehensive income (loss) before tax | 27,296 | (115,481)
Net income, Tax | 26,362 | 761
Unrealized holding losses during the period, Tax | (21,695) | (19,736)
Unrealized losses on securities with credit loss recognized in earnings; Tax | (2,377) | (13,732)
Amounts reclassified into net income: HTM securities, Tax | 0 | 5
Amounts reclassified into net income: Net realized losses on disposals and losses on intent-to-sell AFS securities, Tax | 127 | 2,379
Amounts reclassified into net income: Credit loss expense, Tax | 1,049 | 3,315
Total unrealized losses on investment securities, Tax | (22,896) | (27,769)
Amount reclassified into net income: Net actuarial loss, Tax | 146 | 158
Total defined benefit pension and post-retirement benefit plans, Tax | 146 | 158
Other comprehensive loss, Tax | (22,750) | (27,611)
Comprehensive income (loss), Tax | 3,612 | (26,850)
Net income | 109,270 | 15,236
Unrealized holding losses arising during period, Net | (81,613) | (74,245)
Unrealized losses on securities with credit loss recognized in earnings, Net | (8,943) | (51,658)
Amounts reclassified into net income: HTM Securities, Net | (2) | 20
Amounts reclassified into net income: Net realized losses on disposals and losses on intent-to-sell AFS Securities, Net | 477 | 8,948
Amounts reclassified into net income: Credit loss expense, Net | 3,948 | 12,472
Total Unrealized Losses on Investment Securities, Net | (86,133) | (104,463)
Amount reclassified into net income: Net actuarial loss, Net | 547 | 596
Total defined benefit pension and post-retirement plans, Net | 547 | 596
Other Comprehensive loss, Net | (85,586) | (103,867)
Comprehensive Income (Loss), Net | $ 23,684 | $ (88,631)

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