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v3.22.2.2

Securities - Summary of Debt Securities Available for Sale in an Unrealized Loss Position for Which an Allowance for Credit Losses Has Not Been Recorded (Detail) $ in Thousands | Sep. 30, 2022 USD ($) Security | Dec. 31, 2021 USD ($) Security
--- | --- | ---
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (22,018) | $ (9,953)
Available-for-Sale Within One Year, Estimated Fair Value | $ 208,146 | $ 800,439
Available-for-Sale Within One Year, Number of Securities | Security | 67 | 158
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (115,214) | $ (2,088)
Available-for-Sale More than One Year, Estimated Fair Value | $ 622,005 | $ 76,905
Available-for-Sale More than One Year, Number of Securities | Security | 158 | 15
Available-for-Sale, Gross Unrealized Loss | $ (137,232) | $ (12,041)
Available-for-Sale, Estimated Fair Value | $ 830,151 | $ 877,344
Available-for-Sale, Number of Securities | Security | 225 | 173
U.S. Treasury securities |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (1,145) | $ (61)
Available-for-Sale Within One Year, Estimated Fair Value | $ 28,773 | $ 8,391
Available-for-Sale Within One Year, Number of Securities | Security | 12 | 2
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (571) |
Available-for-Sale More than One Year, Estimated Fair Value | $ 4,387 |
Available-for-Sale More than One Year, Number of Securities | Security | 1 |
Available-for-Sale, Gross Unrealized Loss | $ (1,716) | $ (61)
Available-for-Sale, Estimated Fair Value | $ 33,160 | $ 8,391
Available-for-Sale, Number of Securities | Security | 13 | 2
Mortgage-backed securities |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (14,222) | $ (6,252)
Available-for-Sale Within One Year, Estimated Fair Value | $ 104,500 | $ 535,610
Available-for-Sale Within One Year, Number of Securities | Security | 33 | 102
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (78,743) | $ (1,654)
Available-for-Sale More than One Year, Estimated Fair Value | $ 417,870 | $ 59,457
Available-for-Sale More than One Year, Number of Securities | Security | 105 | 11
Available-for-Sale, Gross Unrealized Loss | $ (92,965) | $ (7,906)
Available-for-Sale, Estimated Fair Value | $ 522,370 | $ 595,067
Available-for-Sale, Number of Securities | Security | 138 | 113
Collateralized mortgage obligations |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (1,526) | $ (1,256)
Available-for-Sale Within One Year, Estimated Fair Value | $ 25,479 | $ 76,894
Available-for-Sale Within One Year, Number of Securities | Security | 10 | 16
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (10,940) | $ (334)
Available-for-Sale More than One Year, Estimated Fair Value | $ 60,927 | $ 12,548
Available-for-Sale More than One Year, Number of Securities | Security | 18 | 3
Available-for-Sale, Gross Unrealized Loss | $ (12,466) | $ (1,590)
Available-for-Sale, Estimated Fair Value | $ 86,406 | $ 89,442
Available-for-Sale, Number of Securities | Security | 28 | 19
Debt securities |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (2,390) | $ (1,503)
Available-for-Sale Within One Year, Estimated Fair Value | $ 38,488 | $ 110,996
Available-for-Sale Within One Year, Number of Securities | Security | 9 | 21
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (9,880) | $ (100)
Available-for-Sale More than One Year, Estimated Fair Value | $ 89,146 | $ 4,900
Available-for-Sale More than One Year, Number of Securities | Security | 18 | 1
Available-for-Sale, Gross Unrealized Loss | $ (12,270) | $ (1,603)
Available-for-Sale, Estimated Fair Value | $ 127,634 | $ 115,896
Available-for-Sale, Number of Securities | Security | 27 | 22
Total U.S. government agency and sponsored agency obligations |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (18,138) | $ (9,011)
Available-for-Sale Within One Year, Estimated Fair Value | $ 168,467 | $ 723,500
Available-for-Sale Within One Year, Number of Securities | Security | 52 | 139
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (99,563) | $ (2,088)
Available-for-Sale More than One Year, Estimated Fair Value | $ 567,943 | $ 76,905
Available-for-Sale More than One Year, Number of Securities | Security | 141 | 15
Available-for-Sale, Gross Unrealized Loss | $ (117,701) | $ (11,099)
Available-for-Sale, Estimated Fair Value | $ 736,410 | $ 800,405
Available-for-Sale, Number of Securities | Security | 193 | 154
Municipal bonds-tax exempt |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (2,735) | $ (881)
Available-for-Sale Within One Year, Estimated Fair Value | $ 10,906 | $ 68,548
Available-for-Sale Within One Year, Number of Securities | Security | 3 | 17
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (15,080) |
Available-for-Sale More than One Year, Estimated Fair Value | $ 49,675 |
Available-for-Sale More than One Year, Number of Securities | Security | 16 |
Available-for-Sale, Gross Unrealized Loss | $ (17,815) | $ (881)
Available-for-Sale, Estimated Fair Value | $ 60,581 | $ 68,548
Available-for-Sale, Number of Securities | Security | 19 | 17

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