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Investment Securities - Securities Available for Sale (Details) - USD ($) | Jun. 30, 2024 | Dec. 31, 2023
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Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 2,613,901,000 | $ 2,699,255,000
Allowance for Credit Loss | (199,000) | (199,000)
Net Carrying Amount | 2,613,702,000 | 2,699,056,000
Gross Unrealized Gains | 1,708,000 | 262,000
Gross Unrealized Losses | 371,379,000 | 352,454,000
Fair Value | 2,244,031,000 | 2,346,864,000
Agency residential MBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,333,993,000 | 1,388,801,000
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | 1,333,993,000 | 1,388,801,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 232,132,000 | 201,192,000
Fair Value | 1,101,861,000 | 1,187,609,000
Agency commercial MBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 257,920,000 | 268,639,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 16,577,000 | 15,333,000
Fair Value | 241,343,000 | 253,306,000
Agency residential CMOs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 313,088,000 | 320,984,000
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | 313,088,000 | 320,984,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 34,828,000 | 36,650,000
Fair Value | 278,260,000 | 284,334,000
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost |  | 4,965,000
Allowance for Credit Loss |  | 0
Net Carrying Amount |  | 4,965,000
Gross Unrealized Gains |  | 3,000
Gross Unrealized Losses |  | 0
Fair Value |  | 4,968,000
Municipal securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 34,541,000 | 29,192,000
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | 34,541,000 | 29,192,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1,484,000 | 1,109,000
Fair Value | 33,057,000 | 28,083,000
Collateralized loan obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 109,168,000 | 109,168,000
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | 109,168,000 | 109,168,000
Gross Unrealized Gains | 272,000 | 0
Gross Unrealized Losses | 86,000 | 752,000
Fair Value | 109,354,000 | 108,416,000
Corporate Debt Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 327,471,000 | 327,426,000
Allowance for Credit Loss | (199,000) | (199,000)
Net Carrying Amount | 327,272,000 | 327,227,000
Gross Unrealized Gains | 1,436,000 | 259,000
Gross Unrealized Losses | 46,746,000 | 60,254,000
Fair Value | 281,962,000 | 267,232,000
Private label commercial MBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 19,144,000 | 22,126,000
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | 19,144,000 | 22,126,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1,068,000 | 1,313,000
Fair Value | 18,076,000 | 20,813,000
SBA securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 13,388,000 | 14,642,000
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | 13,388,000 | 14,642,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1,000,000 | 903,000
Fair Value | 12,388,000 | 13,739,000
Private Label Collateralized Mortgage Obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 187,716,000 | 193,071,000
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | 187,716,000 | 193,071,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 37,430,000 | 34,659,000
Fair Value | 150,286,000 | 158,412,000
Asset-backed Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 17,472,000 | 20,241,000
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | 17,472,000 | 20,241,000
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 28,000 | 289,000
Fair Value | 17,444,000 | 19,952,000
Government agency and government-sponsored enterprise pass through securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Allowance for Credit Loss | 0 | 0
Net Carrying Amount | $ 257,920,000 | $ 268,639,000

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