Securities - Schedule of Amortized Cost and Fair Value of Securities Available for Sale and Held to Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized cost within one year	$ 3,978
Amortized cost one to five years	355,057
Amortized cost for five to ten years	195,305
Amortized cost for after ten years	248,019
Amortized cost, available for sale	802,359
Total available for sale investment securities, amortized cost	1,033,128	$ 1,137,702
Within one year, amortized cost	33,919
One to five years, amortized cost	231,328
Five to ten years, amortized cost	331,954
After ten years, amortized cost	964,613
Amortized cost, held to maturity	1,561,814
Amortized cost, held to maturity, mortgage obligations and backed pools	1,983,496	2,022,748
Fair value within one year	3,912
Fair value for one to five years	324,602
Fair value for five to ten years	164,194
Fair value for after ten years	212,556
Fair value, available for sale	705,264
Fair value, available for sale, mortgage obligations and backed pools	905,813	997,558
Within one year, fair value	33,698
One to five years, fair value	217,643
Five to ten years, fair value	283,216
After ten years, fair value	778,924
Fair value, held to maturity	1,313,481
Fair value, held to maturity, mortgage obligations and backed pools	1,668,229	1,681,309
Federal agency collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, available for sale, mortgage obligations and backed pools	24,529
Total available for sale investment securities, amortized cost	24,529	33,011
Amortized cost, held to maturity, mortgage obligations and backed pools	54,067	56,564
Fair value, available for sale, mortgage obligations and backed pools	22,895	31,215
Fair value, held to maturity, mortgage obligations and backed pools	45,466	47,699
Federal agency mortgage-backed pools
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, available for sale, mortgage obligations and backed pools	206,240
Total available for sale investment securities, amortized cost	206,240	220,963
Amortized cost, held to maturity, mortgage obligations and backed pools	333,767	343,953
Fair value, available for sale, mortgage obligations and backed pools	177,654	190,656
Fair value, held to maturity, mortgage obligations and backed pools	280,620	287,239
Private labeled mortgage-backed pools
Schedule of Available-for-sale Securities [Line Items]
Amortized cost, held to maturity, mortgage obligations and backed pools	33,848	35,466
Fair value, held to maturity, mortgage obligations and backed pools	$ 28,662	$ 29,973

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