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Investment Securities - Schedule Of Investments Within The Available For Sale Portfolio That Had Unrealized Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Unrealized Losses |  |
Fair value, less than 12 months | $ 655,820 | $ 960,053
Unrealized losses, less than 12 months | (3,616) | (15,826)
Fair value, 12 months or longer | 553,979 | 3,112,632
Unrealized loss, 12 months or longer | (7,288) | (92,005)
Fair value, total | 1,209,799 | 4,072,685
Unrealized losses, total | (10,904) | (107,831)
U.S. treasuries |  |
Unrealized Losses |  |
Fair value, less than 12 months | 0 | 0
Unrealized losses, less than 12 months | 0 | 0
Fair value, 12 months or longer | 100 | 98
Unrealized loss, 12 months or longer | 0 | (2)
Fair value, total | 100 | 98
Unrealized losses, total | 0 | (2)
Government agency issued mortgage-backed securities (“MBS”) |  |
Unrealized Losses |  |
Fair value, less than 12 months | 174,983 | 597,008
Unrealized losses, less than 12 months | (495) | (12,335)
Fair value, 12 months or longer | 192,755 | 1,537,106
Unrealized loss, 12 months or longer | (2,061) | (46,065)
Fair value, total | 367,738 | 2,134,114
Unrealized losses, total | (2,556) | (58,400)
Government agency issued collateralized mortgage obligations (“CMO”) |  |
Unrealized Losses |  |
Fair value, less than 12 months | 378,815 | 290,863
Unrealized losses, less than 12 months | (1,970) | (2,860)
Fair value, 12 months or longer | 361,124 | 1,560,420
Unrealized loss, 12 months or longer | (5,227) | (45,821)
Fair value, total | 739,939 | 1,851,283
Unrealized losses, total | (7,197) | (48,681)
Other U.S. government agencies |  |
Unrealized Losses |  |
Fair value, less than 12 months | 98,471 | 29,776
Unrealized losses, less than 12 months | (1,121) | (73)
Fair value, 12 months or longer | 0 | 0
Unrealized loss, 12 months or longer | 0 | 0
Fair value, total | 98,471 | 29,776
Unrealized losses, total | (1,121) | (73)
Corporates and other debt |  |
Unrealized Losses |  |
Fair value, less than 12 months |  | 25,114
Unrealized losses, less than 12 months |  | (344)
Fair value, 12 months or longer |  | 15,008
Unrealized loss, 12 months or longer |  | (117)
Fair value, total |  | 40,122
Unrealized losses, total |  | (461)
State and municipalities |  |
Unrealized Losses |  |
Fair value, less than 12 months | 3,551 | 17,292
Unrealized losses, less than 12 months | (30) | (214)
Fair value, 12 months or longer | 0 | 0
Unrealized loss, 12 months or longer | 0 | 0
Fair value, total | 3,551 | 17,292
Unrealized losses, total | $ (30) | $ (214)

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