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Securities - Schedule of Information Regarding Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS and HTM | $ 2,023,736 | $ 555,070
Unrealized Losses, AFS and HTM | 30,297 | 2,348
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS and HTM | 487,570 | 7,003
Unrealized Losses, AFS and HTM | 18,031 | 332
Total |  |
Fair Value, AFS and HTM | 2,511,306 | 562,073
Unrealized Losses, AFS and HTM | 48,328 | 2,680
Government-sponsored enterprise securities |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS | 21,436 | 29,812
Unrealized Losses, AFS | 522 | 181
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS | 47,743 | 0
Unrealized Losses, AFS | 2,250 | 0
Total |  |
Fair Value, AFS | 69,179 | 29,812
Unrealized Losses, AFS | 2,772 | 181
Mortgage-backed securities |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS and HTM | 1,773,022 | 497,992
Unrealized Losses, AFS and HTM | 25,977 | 1,957
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS and HTM | 404,484 | 6,168
Unrealized Losses, AFS and HTM | 13,857 | 167
Total |  |
Fair Value, AFS and HTM | 2,177,506 | 504,160
Unrealized Losses, AFS and HTM | 39,834 | 2,124
Corporate bonds |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, AFS | 999 | 3,956
Unrealized Losses, AFS | 1 | 45
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, AFS | 945 | 835
Unrealized Losses, AFS | 55 | 165
Total |  |
Fair Value, AFS | 1,944 | 4,791
Unrealized Losses, AFS | 56 | 210
State and local governments |  |
Securities in an Unrealized Loss Position for Less than 12 Months |  |
Fair Value, HTM | 228,279 | 23,310
Unrealized Losses, HTM | 3,797 | 165
Securities in an Unrealized Loss Position for More than 12 Months |  |
Fair Value, HTM | 34,398 | 0
Unrealized Losses, HTM | 1,869 | 0
Total |  |
Fair Value, HTM | 262,677 | 23,310
Unrealized Losses, HTM | $ 5,666 | $ 165

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