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v3.24.1.1.u2

Investment Securities - Securities Held-to-Maturity Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Allowance for Credit Losses, Beginning of Period | $ 1,500 | [1] | $ 1,500 |  |
Provision for Credit Losses | 0 |  | 0 |  |
Charge-offs | 0 |  | 0 |  |
Recoveries | 0 |  | 0 |  |
Allowance for Credit Losses, End of Period | 1,500 | [2] | 1,500 |  |
Securities held to maturity, fair value | 2,153,349 | [2] |  | $ 2,168,316 | [1]
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 676 | [2] |  | 1,760 | [1]
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (139,311) | [2] |  | (120,735) | [1]
U.S. Treasury securities |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Allowance for Credit Losses, Beginning of Period | 0 |  |  |  |
Allowance for Credit Losses, End of Period | 0 |  |  |  |
Securities held to maturity, fair value | 172,338 |  |  | 175,579 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 |  |  | 0 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (15,421) |  |  | (11,454) |
Municipal securities |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Allowance for Credit Losses, Beginning of Period | 140 |  |  |  |
Allowance for Credit Losses, End of Period | 140 |  |  |  |
Securities held to maturity, fair value | 1,206,812 |  |  | 1,220,760 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 676 |  |  | 1,760 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (42,079) |  |  | (28,170) |
Agency commercial MBS |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Allowance for Credit Losses, Beginning of Period | 0 |  |  |  |
Allowance for Credit Losses, End of Period | 0 |  |  |  |
Securities held to maturity, fair value | 400,848 |  |  | 403,162 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 |  |  | 0 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (34,619) |  |  | (30,665) |
Private label commercial MBS |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Allowance for Credit Losses, Beginning of Period | 0 |  |  |  |
Allowance for Credit Losses, End of Period | 0 |  |  |  |
Securities held to maturity, fair value | 323,189 |  |  | 321,204 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 |  |  | 0 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (28,499) |  |  | (29,289) |
Corporate Debt Securities |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Allowance for Credit Losses, Beginning of Period | 1,360 |  |  |  |
Allowance for Credit Losses, End of Period | 1,360 |  |  |  |
Securities held to maturity, fair value | 50,162 |  |  | 47,611 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | 0 |  |  | 0 |
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (18,693) |  |  | $ (21,157) |
Municipal securities |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Allowance for Credit Losses, Beginning of Period | 140 |  | 140 |  |
Provision for Credit Losses | 0 |  | 0 |  |
Charge-offs | 0 |  | 0 |  |
Recoveries | 0 |  | 0 |  |
Allowance for Credit Losses, End of Period | 140 |  | 140 |  |
Corporate Debt Securities |  |  |  |  |
Schedule of Held-to-maturity Securities [Line Items] |  |  |  |  |
Allowance for Credit Losses, Beginning of Period | 1,360 |  | 1,360 |  |
Provision for Credit Losses | 0 |  | 0 |  |
Charge-offs | 0 |  | 0 |  |
Recoveries | 0 |  | 0 |  |
Allowance for Credit Losses, End of Period | $ 1,360 |  | $ 1,360 |  |
[1] | Excludes accrued interest receivable of $13.4 million at December 31, 2023 which is recorded in "Other assets" on the condensed consolidated balance sheets
[2] | Excludes accrued interest receivable of $11.3 million at March 31, 2024 which is recorded in "Other assets" on the condensed consolidated balance sheets

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- Definition Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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- Definition Amount of increase in allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity), from recovery. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Amount of writeoff of investment in debt security, measured at amortized cost (held-to-maturity), charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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