Securities (Schedule of Contractual Maturities of Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	$ 1,533,336	$ 1,566,779
Available for Sale, Fair Value
Debt Securities, Available-for-Sale, Excluding Accrued Interest	1,372,903	1,399,154
Held to Maturity, Fair Value
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	1,623,892	1,705,120
Held to Maturity, Fair Value, Total	1,444,084	1,524,710
Available for Sale Securities and Held to Maturity Securities Amortized Cost	3,157,228
Debt Securities, Available-for-sale and Held-to-maturity	2,816,987
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	157,068
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	152,772
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	1,343,457
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	1,218,330
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	641,485
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	554,456
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Ten Years, Amortized Cost	1,015,218
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Ten Years, Fair Value	891,429
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	141,548
Available for Sale, Amortized Cost, Due after five to ten years	89,022
Available for Sale, Amortized Cost, Due after ten years	0
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	230,570	230,936
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	125,881
Available for Sale, Fair Value, Due after five to ten years	76,610
Available for Sale, Fair Value, Due after ten years	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	202,491	202,300
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	30,395
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	28,488
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, Excluding Accrued Interest, before Allowance for Credit Loss	30,395	31,258
Held to Maturity, Fair Value, Total	28,488	29,036
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	56,061
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	56,061	59,470
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	48,133
Debt Securities, Available-for-Sale, Excluding Accrued Interest	48,133	51,757
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	6,303
Held to Maturity, Amortized Cost, Due after ten years	127,012
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	5,680
Held to Maturity, Fair Value, Due after ten years	121,538
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	133,315	136,830
Held to Maturity, Fair Value, Total	127,218	130,918
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	157,045
Available for Sale, Amortized Cost, Due after one year to five years	904,306
Available for Sale, Amortized Cost, Due after five to ten years	238,658
Available for Sale, Amortized Cost, Due after ten years	233,327
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	152,749
Available for Sale, Fair Value, Due after one year to five years	813,054
Available for Sale, Fair Value, Due after five to ten years	204,445
Available for Sale, Fair Value, Due after ten years	202,655
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	23
Held to Maturity, Amortized Cost, Due after one year to five years	439,151
Held to Maturity, Amortized Cost, Due after five to ten years	402,827
Held to Maturity, Amortized Cost, Due after ten years	781,891
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	23
Held to Maturity, Fair Value, Due after one year to five years	405,276
Held to Maturity, Fair Value, Due after five to ten years	350,011
Held to Maturity, Fair Value, Due after ten years	688,774
Held to Maturity, Fair Value, Total	1,444,084
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	1,205
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	1,205	1,203
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	1,025
Debt Securities, Available-for-Sale, Excluding Accrued Interest	1,025	1,034
Single Issuer Trust Preferred Securities Issued by Banks and Insurers
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	1,500
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	1,369
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, Excluding Accrued Interest, before Allowance for Credit Loss	1,500	1,500
Held to Maturity, Fair Value, Total	1,369	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	194
Available for Sale, Amortized Cost, Due after five to ten years	0
Available for Sale, Amortized Cost, Due after ten years	0
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	194	193
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	190
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, Excluding Accrued Interest	190	191
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	3,305
Available for Sale, Amortized Cost, Due after ten years	35,596
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	38,901	41,874
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	2,981
Available for Sale, Fair Value, Due after ten years	32,804
Debt Securities, Available-for-Sale, Excluding Accrued Interest	35,785	38,843
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	29,508
Held to Maturity, Amortized Cost, Due after five to ten years	38,560
Held to Maturity, Amortized Cost, Due after ten years	438,523
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	27,911
Held to Maturity, Fair Value, Due after five to ten years	33,774
Held to Maturity, Fair Value, Due after ten years	366,962
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	506,591	535,971
Held to Maturity, Fair Value, Total	428,647	458,417
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	7,144
Available for Sale, Amortized Cost, Due after one year to five years	87,582
Available for Sale, Amortized Cost, Due after five to ten years	96,895
Available for Sale, Amortized Cost, Due after ten years	140,465
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	332,086	359,068
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	7,024
Available for Sale, Fair Value, Due after one year to five years	78,115
Available for Sale, Fair Value, Due after five to ten years	81,586
Available for Sale, Fair Value, Due after ten years	120,693
Debt Securities, Available-for-Sale, Excluding Accrued Interest	287,418	313,688
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	23
Held to Maturity, Amortized Cost, Due after one year to five years	278,067
Held to Maturity, Amortized Cost, Due after five to ten years	356,972
Held to Maturity, Amortized Cost, Due after ten years	216,356
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	23
Held to Maturity, Fair Value, Due after one year to five years	259,168
Held to Maturity, Fair Value, Due after five to ten years	309,733
Held to Maturity, Fair Value, Due after ten years	200,274
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	851,418	898,927
Held to Maturity, Fair Value, Total	769,198	815,952
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	149,901
Available for Sale, Amortized Cost, Due after one year to five years	674,982
Available for Sale, Amortized Cost, Due after five to ten years	49,436
Available for Sale, Amortized Cost, Due after ten years	0
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	874,319	874,035
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	145,725
Available for Sale, Fair Value, Due after one year to five years	608,868
Available for Sale, Fair Value, Due after five to ten years	43,268
Available for Sale, Fair Value, Due after ten years	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	797,861	791,341
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	99,681
Held to Maturity, Amortized Cost, Due after five to ten years	992
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	88,340
Held to Maturity, Fair Value, Due after five to ten years	824
Held to Maturity, Fair Value, Due after ten years	0
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	100,673	100,634
Held to Maturity, Fair Value, Total	$ 89,164	$ 88,879