Securities - Schedule of Fair Value Of Available For Sale Securities By Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
AFS securities
Due in one year or less, Amortized Cost	$ 33,263	$ 213
Due in one year or less, Fair value	32,623	209
Due after one year to five years, Amortized Cost	678,254	651,654
Due after one year to five years, Fair value	619,157	603,469
Due after five to ten years, Amortized Cost	287,914	446,531
Due after five to ten years, Fair value	247,024	391,693
Due after ten years, Amortized Cost	3,893,625	4,063,506
Due after ten years, Fair value	3,199,038	3,412,150
Amortized Cost	4,893,056	5,161,904
Fair Value	4,097,842	4,407,521
HTM securities
Due in one year or less, Amortized Cost	0	0
Due in one year or less, Fair value	0	0
Due after one year to five years, Amortized Cost	135,611	80,014
Due after one year to five years, Fair value	121,904	72,952
Due after five to ten years, Amortized Cost	57,182	114,955
Due after five to ten years, Fair value	49,013	101,551
Due after ten years, Amortized Cost	243,919	254,752
Due after ten years, Fair value	214,481	230,319
Amortized Cost	436,712	449,721
Fair Value	385,398	404,822
Total
Due in one year or less, Amortized Cost	33,263	213
Due in one year or less, Fair value	32,623	209
Due after one year to five years, Amortized Cost	813,865	731,668
Due after one year to five years, Fair value	741,061	676,421
Due after five to ten years, Amortized Cost	345,096	561,486
Due after five to ten years, Fair value	296,037	493,244
Due after ten years, Amortized Cost	4,137,544	4,318,258
Due after ten years, Fair value	3,413,519	3,642,469
Amortized Cost	5,329,768	5,611,625
Fair Value	4,483,240	4,812,343
Government-sponsored residential mortgage-backed securities
AFS securities
Due in one year or less, Amortized Cost	0	0
Due in one year or less, Fair value	0	0
Due after one year to five years, Amortized Cost	27,804	29,288
Due after one year to five years, Fair value	26,680	28,188
Due after five to ten years, Amortized Cost	15,471	22,735
Due after five to ten years, Fair value	14,222	21,235
Due after ten years, Amortized Cost	3,105,436	3,250,142
Due after ten years, Fair value	2,556,648	2,731,215
Amortized Cost	3,148,711	3,302,165
Fair Value	2,597,550	2,780,638
HTM securities
Due in one year or less, Amortized Cost	0	0
Due in one year or less, Fair value	0	0
Due after one year to five years, Amortized Cost	0	0
Due after one year to five years, Fair value	0	0
Due after five to ten years, Amortized Cost	0	0
Due after five to ten years, Fair value	0	0
Due after ten years, Amortized Cost	243,919	254,752
Due after ten years, Fair value	214,481	230,319
Amortized Cost	243,919	254,752
Fair Value	214,481	230,319
Government-sponsored commercial mortgage-backed securities
AFS securities
Due in one year or less, Amortized Cost	0	0
Due in one year or less, Fair value	0	0
Due after one year to five years, Amortized Cost	403,508	256,229
Due after one year to five years, Fair value	364,695	234,725
Due after five to ten years, Amortized Cost	224,736	379,749
Due after five to ten years, Fair value	187,823	327,198
Due after ten years, Amortized Cost	674,538	690,051
Due after ten years, Fair value	538,376	562,453
Amortized Cost	1,302,782	1,326,029
Fair Value	1,090,894	1,124,376
HTM securities
Due in one year or less, Amortized Cost	0	0
Due in one year or less, Fair value	0	0
Due after one year to five years, Amortized Cost	135,611	80,014
Due after one year to five years, Fair value	121,904	72,952
Due after five to ten years, Amortized Cost	57,182	114,955
Due after five to ten years, Fair value	49,013	101,551
Due after ten years, Amortized Cost	0	0
Due after ten years, Fair value	0	0
Amortized Cost	192,793	194,969
Fair Value	170,917	174,503
U.S. Agency bonds
AFS securities
Due in one year or less, Amortized Cost	0	0
Due in one year or less, Fair value	0	0
Due after one year to five years, Amortized Cost	144,227	236,454
Due after one year to five years, Fair value	130,238	216,011
Due after five to ten years, Amortized Cost	0	0
Due after five to ten years, Fair value	0	0
Due after ten years, Amortized Cost	0	0
Due after ten years, Fair value	0	0
Amortized Cost	144,227	236,454
Fair Value	130,238	216,011
U.S. Treasury securities
AFS securities
Due in one year or less, Amortized Cost	29,964	0
Due in one year or less, Fair value	29,383	0
Due after one year to five years, Amortized Cost	69,703	99,552
Due after one year to five years, Fair value	66,171	95,152
Due after five to ten years, Amortized Cost	0	0
Due after five to ten years, Fair value	0	0
Due after ten years, Amortized Cost	0	0
Due after ten years, Fair value	0	0
Amortized Cost	99,667	99,552
Fair Value	95,554	95,152
State and municipal bonds and obligations
AFS securities
Due in one year or less, Amortized Cost	3,299	213
Due in one year or less, Fair value	3,240	209
Due after one year to five years, Amortized Cost	33,012	30,131
Due after one year to five years, Fair value	31,373	29,393
Due after five to ten years, Amortized Cost	47,707	44,047
Due after five to ten years, Fair value	44,979	43,260
Due after ten years, Amortized Cost	113,651	123,313
Due after ten years, Fair value	104,014	118,482
Amortized Cost	197,669	197,704
Fair Value	$ 183,606	$ 191,344