Securities - Available for Sale Securities With Gross Unrealized Losses and Their Fair Value (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions	4	4
Held-to-maturity securities have been in a continuous unrealized loss position, fair value	$ 57,665	$ 62,550
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss	16,548	12,261
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value	0	62,550
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	0	$ 12,261
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value	57,665
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 16,548
Securities have been in a continuous unrealized loss position, number of positions	177	166
Securities have been in a continuous unrealized loss position, fair value	$ 712,583	$ 718,869
Securities have been in a continuous unrealized loss position, unrealized losses	108,127	91,529
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	64,593	322,133
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	2,879	18,711
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	647,990	396,736
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 105,248	$ 72,818
Other Debt Obligations
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions	3	3
Held-to-maturity securities have been in a continuous unrealized loss position, fair value	$ 51,031	$ 55,561
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss	15,322	11,375
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value	0	55,561
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	0	$ 11,375
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value	51,031
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 15,322
Securities have been in a continuous unrealized loss position, number of positions	54	46
Securities have been in a continuous unrealized loss position, fair value	$ 375,054	$ 335,100
Securities have been in a continuous unrealized loss position, unrealized losses	24,185	21,489
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	62,395	218,024
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	2,776	8,986
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	312,659	117,076
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 21,409	$ 12,503
US States and Political Subdivisions Debt Securities [Member]
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions	3	3
Held-to-maturity securities have been in a continuous unrealized loss position, fair value	$ 51,031	$ 55,561
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss	15,322	11,375
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value	0	55,561
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	0	$ 11,375
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value	51,031
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 15,322
US Government Agencies Debt Securities [Member]
Securities have been in a continuous unrealized loss position, number of positions	8	7
Securities have been in a continuous unrealized loss position, fair value	$ 74,192	$ 77,856
Securities have been in a continuous unrealized loss position, unrealized losses	1,694	2,619
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	5,316	77,059
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	26	2,517
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	68,876	797
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 1,668	$ 102
Corporate Debt Securities [Member]
Securities have been in a continuous unrealized loss position, number of positions	26	20
Securities have been in a continuous unrealized loss position, fair value	$ 152,345	$ 131,766
Securities have been in a continuous unrealized loss position, unrealized losses	20,794	14,664
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	29,023	45,447
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	2,679	3,553
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	123,322	86,319
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 18,115	$ 11,111
Collateralized Loan Obligations [Member]
Securities have been in a continuous unrealized loss position, number of positions	20	19
Securities have been in a continuous unrealized loss position, fair value	$ 148,517	$ 125,478
Securities have been in a continuous unrealized loss position, unrealized losses	1,697	4,206
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	28,056	95,518
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	71	2,916
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	120,461	29,960
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 1,626	$ 1,290
Collateralized Mortgage Backed Securities
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions	1	1
Held-to-maturity securities have been in a continuous unrealized loss position, fair value	$ 6,634	$ 6,989
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss	1,226	886
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value	0	6,989
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	0	$ 886
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value	6,634
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 1,226
Securities have been in a continuous unrealized loss position, number of positions	123	120
Securities have been in a continuous unrealized loss position, fair value	$ 337,529	$ 383,769
Securities have been in a continuous unrealized loss position, unrealized losses	83,942	70,040
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	2,198	104,109
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	103	9,725
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	335,331	279,660
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 83,839	$ 60,315
REMIC and CMO [Member]
Securities have been in a continuous unrealized loss position, number of positions	46	47
Securities have been in a continuous unrealized loss position, fair value	$ 131,210	$ 148,120
Securities have been in a continuous unrealized loss position, unrealized losses	32,827	27,298
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	0	40,911
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	0	3,457
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	131,210	107,209
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 32,827	$ 23,841
GNMA [Member]
Securities have been in a continuous unrealized loss position, number of positions	12	8
Securities have been in a continuous unrealized loss position, fair value	$ 6,458	$ 7,133
Securities have been in a continuous unrealized loss position, unrealized losses	2,137	1,879
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	113	64
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	2
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	6,345	7,069
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 2,135	$ 1,879
FNMA [Member]
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions	1	1
Held-to-maturity securities have been in a continuous unrealized loss position, fair value	$ 6,634	$ 6,989
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss	1,226	886
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value	0	6,989
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	0	$ 886
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value	6,634
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 1,226
Securities have been in a continuous unrealized loss position, number of positions	47	47
Securities have been in a continuous unrealized loss position, fair value	$ 128,781	$ 148,229
Securities have been in a continuous unrealized loss position, unrealized losses	29,116	24,425
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	2,085	38,296
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	101	3,871
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	126,696	109,933
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 29,015	$ 20,554
FHLMC [Member]
Securities have been in a continuous unrealized loss position, number of positions	18	18
Securities have been in a continuous unrealized loss position, fair value	$ 71,080	$ 80,287
Securities have been in a continuous unrealized loss position, unrealized losses	19,862	16,438
Securities have been in a continuous unrealized loss position, less than 12 months, fair value	0	24,838
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses	0	2,397
Securities have been in a continuous unrealized loss position, 12 months or more, fair value	71,080	55,449
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses	$ 19,862	$ 14,041