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v3.22.1

Securities (Summary of Book Values and Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value |  |
Amortized Cost | $ 2,898,910 | $ 2,662,481
Fair Value | 2,685,048 | 2,630,414
Unrealized Gains | 716 | 10,595
Unrealized (Losses) | (214,578) | (42,662)
Securities held to maturity: |  |
Amortized Cost | 546,090 | 513,825
Fair Value | 492,307 | 511,699
Unrealized Gains | 20 | 3,540
Unrealized (Losses) | (53,803) | (5,666)
US Treasuries |  |
Fair Value |  |
Amortized Cost | 149,534 | 0
Fair Value | 149,391 | 0
Unrealized Gains | 0 | 0
Unrealized (Losses) | (143) | 0
Government-sponsored enterprise securities |  |
Fair Value |  |
Amortized Cost | 71,953 | 71,951
Fair Value | 64,168 | 69,179
Unrealized Gains | 0 | 0
Unrealized (Losses) | (7,785) | (2,772)
Mortgage-backed securities |  |
Fair Value |  |
Amortized Cost | 2,632,054 | 2,545,150
Fair Value | 2,425,911 | 2,514,805
Unrealized Gains | 349 | 9,489
Unrealized (Losses) | (206,492) | (39,834)
Securities held to maturity: |  |
Amortized Cost | 18,662 | 20,260
Fair Value | 18,513 | 20,845
Unrealized Gains | 1 | 585
Unrealized (Losses) | (150) | 0
Corporate bonds |  |
Fair Value |  |
Amortized Cost | 45,369 | 45,380
Fair Value | 45,578 | 46,430
Unrealized Gains | 367 | 1,106
Unrealized (Losses) | (158) | (56)
State and local governments |  |
Securities held to maturity: |  |
Amortized Cost | 527,428 | 493,565
Fair Value | 473,794 | 490,854
Unrealized Gains | 19 | 2,955
Unrealized (Losses) | $ (53,653) | $ (5,666)

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