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v3.23.2

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 | Jun. 30, 2023 USD ($) Security | Dec. 31, 2022 USD ($) Security
--- | --- | ---
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (2,689) | $ (4,324)
Available-for-Sale Within One Year, Estimated Fair Value | $ 114,153 | $ 129,210
Available-for-Sale Within One Year, Number of Securities | Security | 42 | 49
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (116,531) | $ (120,697)
Available-for-Sale More than One Year, Estimated Fair Value | $ 715,446 | $ 719,787
Available-for-Sale More than One Year, Number of Securities | Security | 194 | 184
Available-for-Sale, Gross Unrealized Loss | $ (119,220) | $ (125,021)
Available-for-Sale, Estimated Fair Value | $ 829,599 | $ 848,997
Available-for-Sale, Number of Securities | Security | 236 | 233
U.S. Treasury securities |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (374) | $ (414)
Available-for-Sale Within One Year, Estimated Fair Value | $ 37,090 | $ 33,812
Available-for-Sale Within One Year, Number of Securities | Security | 15 | 14
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (1,321) | $ (1,250)
Available-for-Sale More than One Year, Estimated Fair Value | $ 19,394 | $ 14,215
Available-for-Sale More than One Year, Number of Securities | Security | 6 | 4
Available-for-Sale, Gross Unrealized Loss | $ (1,695) | $ (1,664)
Available-for-Sale, Estimated Fair Value | $ 56,484 | $ 48,027
Available-for-Sale, Number of Securities | Security | 21 | 18
Mortgage-backed securities - residential |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (1,448) | $ (1,712)
Available-for-Sale Within One Year, Estimated Fair Value | $ 34,738 | $ 36,009
Available-for-Sale Within One Year, Number of Securities | Security | 16 | 18
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (70,432) | $ (73,789)
Available-for-Sale More than One Year, Estimated Fair Value | $ 404,808 | $ 424,302
Available-for-Sale More than One Year, Number of Securities | Security | 108 | 105
Available-for-Sale, Gross Unrealized Loss | $ (71,880) | $ (75,501)
Available-for-Sale, Estimated Fair Value | $ 439,546 | $ 460,311
Available-for-Sale, Number of Securities | Security | 124 | 123
Mortgage-backed securities - commercial |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (88) | $ (84)
Available-for-Sale Within One Year, Estimated Fair Value | $ 4,077 | $ 4,069
Available-for-Sale Within One Year, Number of Securities | Security | 1 | 1
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (11,926) | $ (10,423)
Available-for-Sale More than One Year, Estimated Fair Value | $ 44,701 | $ 47,221
Available-for-Sale More than One Year, Number of Securities | Security | 14 | 14
Available-for-Sale, Gross Unrealized Loss | $ (12,014) | $ (10,507)
Available-for-Sale, Estimated Fair Value | $ 48,778 | $ 51,290
Available-for-Sale, Number of Securities | Security | 15 | 15
Collateralized mortgage obligations |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (633) | $ (1,011)
Available-for-Sale Within One Year, Estimated Fair Value | $ 24,462 | $ 23,606
Available-for-Sale Within One Year, Number of Securities | Security | 6 | 8
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (10,693) | $ (11,740)
Available-for-Sale More than One Year, Estimated Fair Value | $ 59,614 | $ 61,879
Available-for-Sale More than One Year, Number of Securities | Security | 22 | 20
Available-for-Sale, Gross Unrealized Loss | $ (11,326) | $ (12,751)
Available-for-Sale, Estimated Fair Value | $ 84,076 | $ 85,485
Available-for-Sale, Number of Securities | Security | 28 | 28
Debt securities |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (146) | $ (1,103)
Available-for-Sale Within One Year, Estimated Fair Value | $ 13,786 | $ 31,714
Available-for-Sale Within One Year, Number of Securities | Security | 4 | 8
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (10,864) | $ (10,736)
Available-for-Sale More than One Year, Estimated Fair Value | $ 120,590 | $ 106,785
Available-for-Sale More than One Year, Number of Securities | Security | 25 | 22
Available-for-Sale, Gross Unrealized Loss | $ (11,010) | $ (11,839)
Available-for-Sale, Estimated Fair Value | $ 134,376 | $ 138,499
Available-for-Sale, Number of Securities | Security | 29 | 30
Total U.S. government agency and sponsored agency obligations |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale Within One Year, Gross Unrealized Loss | $ (2,315) | $ (3,910)
Available-for-Sale Within One Year, Estimated Fair Value | $ 77,063 | $ 95,398
Available-for-Sale Within One Year, Number of Securities | Security | 27 | 35
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (103,915) | $ (106,688)
Available-for-Sale More than One Year, Estimated Fair Value | $ 629,713 | $ 640,187
Available-for-Sale More than One Year, Number of Securities | Security | 169 | 161
Available-for-Sale, Gross Unrealized Loss | $ (106,230) | $ (110,598)
Available-for-Sale, Estimated Fair Value | $ 706,776 | $ 735,585
Available-for-Sale, Number of Securities | Security | 196 | 196
Municipal bonds-tax exempt |  |
Summary of Investment Holdings [Line Items] |  |
Available-for-Sale More than One Year, Gross Unrealized Loss | $ (11,295) | $ (12,759)
Available-for-Sale More than One Year, Estimated Fair Value | $ 66,339 | $ 65,385
Available-for-Sale More than One Year, Number of Securities | Security | 19 | 19
Available-for-Sale, Gross Unrealized Loss | $ (11,295) | $ (12,759)
Available-for-Sale, Estimated Fair Value | $ 66,339 | $ 65,385
Available-for-Sale, Number of Securities | Security | 19 | 19

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