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Investment Securities - Securities Available for Sale (Details) - USD ($)
Jun. 30, 2024
Dec. 31, 2023
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