Securities - Schedule of Government-Sponsored Residential Mortgage-Backed Securities With Gross Unrealized Losses (Details) $ in Thousands	Jun. 30, 2024 USD ($) holding	Dec. 31, 2023 USD ($) holding
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Number of holdings | holding	771	736
Gross Unrealized Losses
Less than 12 Months	$ 1,312	$ 269
12 Months or Longer	793,902	754,286
Total	795,214	754,555
Fair Value
Less than 12 Months	32,451	27,821
12 Months or Longer	4,065,391	4,346,529
Total	$ 4,097,842	$ 4,374,350
Government-sponsored residential mortgage-backed securities
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Number of holdings | holding	324	324
Gross Unrealized Losses
Less than 12 Months	$ 0	$ 0
12 Months or Longer	551,161	521,527
Total	551,161	521,527
Fair Value
Less than 12 Months	0	0
12 Months or Longer	2,597,550	2,780,638
Total	$ 2,597,550	$ 2,780,638
Government-sponsored commercial mortgage-backed securities
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Number of holdings | holding	187	187
Gross Unrealized Losses
Less than 12 Months	$ 0	$ 0
12 Months or Longer	211,888	201,653
Total	211,888	201,653
Fair Value
Less than 12 Months	0	0
12 Months or Longer	1,090,894	1,124,376
Total	$ 1,090,894	$ 1,124,376
U.S. Agency bonds
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Number of holdings | holding	14	23
Gross Unrealized Losses
Less than 12 Months	$ 0	$ 0
12 Months or Longer	13,989	20,443
Total	13,989	20,443
Fair Value
Less than 12 Months	0	0
12 Months or Longer	130,238	216,011
Total	$ 130,238	$ 216,011
U.S. Treasury securities
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Number of holdings | holding	6	6
Gross Unrealized Losses
Less than 12 Months	$ 0	$ 36
12 Months or Longer	4,113	4,364
Total	4,113	4,400
Fair Value
Less than 12 Months	0	4,927
12 Months or Longer	95,554	90,225
Total	$ 95,554	$ 95,152
State and municipal bonds and obligations
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Number of holdings | holding	240	196
Gross Unrealized Losses
Less than 12 Months	$ 1,312	$ 233
12 Months or Longer	12,751	6,299
Total	14,063	6,532
Fair Value
Less than 12 Months	32,451	22,894
12 Months or Longer	151,155	135,279
Total	$ 183,606	$ 158,173