Investment Securities - Held-to-maturity Securities with Unrealized Loss (Details) $ in Thousands	Mar. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$ 171,550	$ 161,946
Less than 12 months, unrealized loss	$ 1,759	$ 5,277
Less than 12 months, no. of securities | security	39	49
12 months or more, fair value	$ 293,800	$ 265,877
12 months or more, unrealized loss	$ 69,938	$ 76,962
12 months or more, no. of securities | security	130	120
Total fair value	$ 465,350	$ 427,823
Total unrealized loss	71,697	82,239
U.S. government sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	81,988	59,905
Less than 12 months, unrealized loss	$ 413	$ 651
Less than 12 months, no. of securities | security	14	17
12 months or more, fair value	$ 30,303	$ 29,306
12 months or more, unrealized loss	$ 7,710	$ 8,825
12 months or more, no. of securities | security	9	9
Total fair value	$ 112,291	$ 89,211
Total unrealized loss	8,123	9,476
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	0	3,590
Less than 12 months, unrealized loss	$ 0	$ 1,072
Less than 12 months, no. of securities | security	0	3
12 months or more, fair value	$ 110,831	$ 101,863
12 months or more, unrealized loss	$ 30,851	$ 35,336
12 months or more, no. of securities | security	67	64
Total fair value	$ 110,831	$ 105,453
Total unrealized loss	30,851	36,408
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	67,554	71,582
Less than 12 months, unrealized loss	$ 884	$ 2,904
Less than 12 months, no. of securities | security	20	21
12 months or more, fair value	$ 87,045	$ 72,862
12 months or more, unrealized loss	$ 15,461	$ 15,557
12 months or more, no. of securities | security	23	18
Total fair value	$ 154,599	$ 144,444
Total unrealized loss	16,345	18,461
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	22,008	26,869
Less than 12 months, unrealized loss	$ 462	$ 650
Less than 12 months, no. of securities | security	5	8
12 months or more, fair value	$ 65,621	$ 61,846
12 months or more, unrealized loss	$ 15,916	$ 17,244
12 months or more, no. of securities | security	31	29
Total fair value	$ 87,629	$ 88,715
Total unrealized loss	$ 16,378	$ 17,894