Securities (Schedule of Contractual Maturities of Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Available for Sale, Fair Value
Debt Securities, Available-for-sale, Amortized Cost	$ 1,626,890	$ 1,583,736
Debt Securities, Available-for-sale	1,501,949	1,571,148
Held to Maturity, Fair Value
Debt Securities, Held-to-maturity	1,408,189	1,066,818
Held to Maturity, Fair Value, Total	1,297,165	1,064,133
Available for Sale Securities and Held to Maturity Securities Amortized Cost	3,035,079
Debt Securities, Available-for-sale and Held-to-maturity	2,799,114
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	19,719
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	19,704
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	1,035,584
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	974,653
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	973,681
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	879,571
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Ten Years, Amortized Cost	1,006,095
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Ten Years, Fair Value	925,186
U.S. government agency securities
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	0
Available for Sale, Amortized Cost, Due after one year to five years	68,039
Available for Sale, Amortized Cost, Due after five to ten years	163,265
Available for Sale, Amortized Cost, Due after ten years	0
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	0
Available for Sale, Fair Value, Due after one year to five years	63,455
Available for Sale, Fair Value, Due after five to ten years	146,000
Available for Sale, Fair Value, Due after ten years	0
Debt Securities, Available-for-sale, Amortized Cost	231,304	217,393
Debt Securities, Available-for-sale	209,455	215,482
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	0
Held to Maturity, Amortized Cost, Due after one year to five years	32,128
Held to Maturity, Amortized Cost, Due after five to ten years	0
Held to Maturity, Amortized Cost, Due after ten years	0
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	0
Held to Maturity, Fair Value, Due after one year to five years	30,300
Held to Maturity, Fair Value, Due after five to ten years	0
Held to Maturity, Fair Value, Due after ten years	0
Debt Securities, Held-to-maturity	32,128	32,987
Held to Maturity, Fair Value, Total	30,300	32,546
Small Business Administration Pooled Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	0
Available for Sale, Amortized Cost, Due after one year to five years	0
Available for Sale, Amortized Cost, Due after five to ten years	0
Available for Sale, Amortized Cost, Due after ten years	64,248
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	0
Available for Sale, Fair Value, Due after one year to five years	0
Available for Sale, Fair Value, Due after five to ten years	0
Available for Sale, Fair Value, Due after ten years	59,465
Debt Securities, Available-for-sale, Amortized Cost	64,248	47,075
Debt Securities, Available-for-sale	59,465	48,914
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	0
Held to Maturity, Amortized Cost, Due after one year to five years	0
Held to Maturity, Amortized Cost, Due after five to ten years	0
Held to Maturity, Amortized Cost, Due after ten years	65,029
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	0
Held to Maturity, Fair Value, Due after one year to five years	0
Held to Maturity, Fair Value, Due after five to ten years	0
Held to Maturity, Fair Value, Due after ten years	64,302
Debt Securities, Held-to-maturity	65,029	21,023
Held to Maturity, Fair Value, Total	64,302	21,756
Debt Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	19,719
Available for Sale, Amortized Cost, Due after one year to five years	839,759
Available for Sale, Amortized Cost, Due after five to ten years	496,763
Available for Sale, Amortized Cost, Due after ten years	270,649
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	19,704
Available for Sale, Fair Value, Due after one year to five years	786,013
Available for Sale, Fair Value, Due after five to ten years	446,998
Available for Sale, Fair Value, Due after ten years	249,234
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	0
Held to Maturity, Amortized Cost, Due after one year to five years	195,825
Held to Maturity, Amortized Cost, Due after five to ten years	476,918
Held to Maturity, Amortized Cost, Due after ten years	735,446
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	0
Held to Maturity, Fair Value, Due after one year to five years	188,640
Held to Maturity, Fair Value, Due after five to ten years	432,573
Held to Maturity, Fair Value, Due after ten years	675,952
Held to Maturity, Fair Value, Total	1,297,165
Pooled trust preferred securities issued by banks and insurers
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	0
Available for Sale, Amortized Cost, Due after one year to five years	0
Available for Sale, Amortized Cost, Due after five to ten years	0
Available for Sale, Amortized Cost, Due after ten years	1,200
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	0
Available for Sale, Fair Value, Due after one year to five years	0
Available for Sale, Fair Value, Due after five to ten years	0
Available for Sale, Fair Value, Due after ten years	999
Debt Securities, Available-for-sale, Amortized Cost	1,200	1,199
Debt Securities, Available-for-sale	999	1,000
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	0
Available for Sale, Amortized Cost, Due after one year to five years	0
Available for Sale, Amortized Cost, Due after five to ten years	0
Available for Sale, Amortized Cost, Due after ten years	489
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	0
Available for Sale, Fair Value, Due after one year to five years	0
Available for Sale, Fair Value, Due after five to ten years	0
Available for Sale, Fair Value, Due after ten years	468
Debt Securities, Available-for-sale, Amortized Cost	489	489
Debt Securities, Available-for-sale	468	491
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	0
Held to Maturity, Amortized Cost, Due after one year to five years	0
Held to Maturity, Amortized Cost, Due after five to ten years	1,500
Held to Maturity, Amortized Cost, Due after ten years	0
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	0
Held to Maturity, Fair Value, Due after one year to five years	0
Held to Maturity, Fair Value, Due after five to ten years	1,508
Held to Maturity, Fair Value, Due after ten years	0
Debt Securities, Held-to-maturity	1,500	1,500
Held to Maturity, Fair Value, Total	1,508	1,508
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	0
Available for Sale, Amortized Cost, Due after one year to five years	192
Available for Sale, Amortized Cost, Due after five to ten years	0
Available for Sale, Amortized Cost, Due after ten years	0
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	0
Available for Sale, Fair Value, Due after one year to five years	197
Available for Sale, Fair Value, Due after five to ten years	0
Available for Sale, Fair Value, Due after ten years	0
Debt Securities, Available-for-sale, Amortized Cost	192	192
Debt Securities, Available-for-sale	197	203
Agency Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	0
Available for Sale, Amortized Cost, Due after one year to five years	0
Available for Sale, Amortized Cost, Due after five to ten years	0
Available for Sale, Amortized Cost, Due after ten years	46,014
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	0
Available for Sale, Fair Value, Due after one year to five years	0
Available for Sale, Fair Value, Due after five to ten years	0
Available for Sale, Fair Value, Due after ten years	44,477
Debt Securities, Available-for-sale, Amortized Cost	46,014	78,966
Debt Securities, Available-for-sale	44,477	79,677
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	0
Held to Maturity, Amortized Cost, Due after one year to five years	30,155
Held to Maturity, Amortized Cost, Due after five to ten years	35,635
Held to Maturity, Amortized Cost, Due after ten years	511,393
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	0
Held to Maturity, Fair Value, Due after one year to five years	29,906
Held to Maturity, Fair Value, Due after five to ten years	32,474
Held to Maturity, Fair Value, Due after ten years	462,614
Debt Securities, Held-to-maturity	577,183	415,736
Held to Maturity, Fair Value, Total	524,994	408,845
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	19,719
Available for Sale, Amortized Cost, Due after one year to five years	79,853
Available for Sale, Amortized Cost, Due after five to ten years	151,425
Available for Sale, Amortized Cost, Due after ten years	158,698
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	19,704
Available for Sale, Fair Value, Due after one year to five years	77,570
Available for Sale, Fair Value, Due after five to ten years	136,691
Available for Sale, Fair Value, Due after ten years	143,825
Debt Securities, Available-for-sale, Amortized Cost	409,695	364,955
Debt Securities, Available-for-sale	377,790	363,933
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	0
Held to Maturity, Amortized Cost, Due after one year to five years	83,789
Held to Maturity, Amortized Cost, Due after five to ten years	388,941
Held to Maturity, Amortized Cost, Due after ten years	159,024
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	0
Held to Maturity, Fair Value, Due after one year to five years	82,561
Held to Maturity, Fair Value, Due after five to ten years	352,477
Held to Maturity, Fair Value, Due after ten years	149,036
Debt Securities, Held-to-maturity	631,754	493,012
Held to Maturity, Fair Value, Total	584,074	497,236
US Treasury Securities [Member]
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Due in one year or less	0
Available for Sale, Amortized Cost, Due after one year to five years	691,675
Available for Sale, Amortized Cost, Due after five to ten years	182,073
Available for Sale, Amortized Cost, Due after ten years	0
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	0
Available for Sale, Fair Value, Due after one year to five years	644,791
Available for Sale, Fair Value, Due after five to ten years	164,307
Available for Sale, Fair Value, Due after ten years	0
Debt Securities, Available-for-sale, Amortized Cost	873,748	873,467
Debt Securities, Available-for-sale	809,098	861,448
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	0
Held to Maturity, Amortized Cost, Due after one year to five years	49,753
Held to Maturity, Amortized Cost, Due after five to ten years	50,842
Held to Maturity, Amortized Cost, Due after ten years	0
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	0
Held to Maturity, Fair Value, Due after one year to five years	45,873
Held to Maturity, Fair Value, Due after five to ten years	46,114
Held to Maturity, Fair Value, Due after ten years	0
Debt Securities, Held-to-maturity	100,595	102,560
Held to Maturity, Fair Value, Total	$ 91,987	$ 102,242