Investment Securities (Gross Unrealized Losses and Fair Value by Length of Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	$ 2,814	$ 32,180
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	38	2,541
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	77,953	50,752
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	11,197	9,878
Available-for-sale securities, continuous unrealized loss position, fair value	80,767	82,932
Available-for-sale securities, continuous unrealized loss position, unrealized losses	11,235	12,419
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value		224,974
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses		12,625
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, fair value		268,951
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, unrealized losses		52,238
Held-to-maturity securities, continuous unrealized loss position, fair value		493,925
Held-to-maturity securities, continuous unrealized loss position, unrealized losses		64,863
Mortgage-backed
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	1,754	29,125
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	32	2,409
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	59,277	34,167
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	7,747	6,290
Available-for-sale securities, continuous unrealized loss position, fair value	61,031	63,292
Available-for-sale securities, continuous unrealized loss position, unrealized losses	7,779	8,699
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value		148,771
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses		9,402
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, fair value		199,649
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, unrealized losses		41,062
Held-to-maturity securities, continuous unrealized loss position, fair value		348,420
Held-to-maturity securities, continuous unrealized loss position, unrealized losses		50,464
U.S. Government agencies
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value	1,060	1,165
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses	6	4
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	16,833	16,585
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	3,277	3,588
Available-for-sale securities, continuous unrealized loss position, fair value	17,893	17,750
Available-for-sale securities, continuous unrealized loss position, unrealized losses	3,283	3,592
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value		67,332
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses		2,786
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, fair value		67,163
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, unrealized losses		10,815
Held-to-maturity securities, continuous unrealized loss position, fair value		134,495
Held-to-maturity securities, continuous unrealized loss position, unrealized losses		13,601
Other debt securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value		1,890
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses		128
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, fair value	1,843
Available-for-sale securities, continuous unrealized loss position, more than 12 Months, unrealized losses	173
Available-for-sale securities, continuous unrealized loss position, fair value	1,843	1,890
Available-for-sale securities, continuous unrealized loss position, unrealized losses	$ 173	128
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, fair value		8,091
Held-to-maturity securities, continuous unrealized loss position, less than 12 Months, unrealized losses		409
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, fair value		2,139
Held-to-maturity securities, continuous unrealized loss position, more than 12 Months, unrealized losses		361
Held-to-maturity securities, continuous unrealized loss position, fair value		10,230
Held-to-maturity securities, continuous unrealized loss position, unrealized losses		770
States and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value		780
Available-for-sale securities, continuous unrealized loss position, less than 12 Months, unrealized losses		28
Available-for-sale securities, continuous unrealized loss position, fair value		780
Available-for-sale securities, continuous unrealized loss position, unrealized losses		$ 28