Securities (Schedule of Contractual Maturities of Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 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	$ 1,551,042	$ 1,566,779
Available for Sale, Fair Value
Debt Securities, Available-for-Sale, Excluding Accrued Interest	1,405,602	1,399,154
Held to Maturity, Fair Value
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	1,678,376	1,705,120
Held to Maturity, Fair Value, Total	1,519,504	1,524,710
Available for Sale Securities and Held to Maturity Securities Amortized Cost	3,229,418
Debt Securities, Available-for-sale and Held-to-maturity	2,925,106
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	107,197
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	104,149
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	1,280,338
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	1,179,694
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost	787,194
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	696,863
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Ten Years, Amortized Cost	1,054,689
Debt Securities, Available-for-sale and Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Ten Years, Fair Value	944,400
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	117,578
Available for Sale, Amortized Cost, Due after five to ten years	113,175
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	230,753	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	106,039
Available for Sale, Fair Value, Due after five to ten years	98,975
Available for Sale, Fair Value, Due after ten years	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	205,014	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	30,824
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	28,958
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	30,824	31,258
Held to Maturity, Fair Value, Total	28,958	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	57,648
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	57,648	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	50,753
Debt Securities, Available-for-Sale, Excluding Accrued Interest	50,753	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	3,389
Held to Maturity, Amortized Cost, Due after ten years	132,394
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	3,132
Held to Maturity, Fair Value, Due after ten years	129,210
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	135,783	136,830
Held to Maturity, Fair Value, Total	132,342	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	107,116
Available for Sale, Amortized Cost, Due after one year to five years	905,098
Available for Sale, Amortized Cost, Due after five to ten years	295,745
Available for Sale, Amortized Cost, Due after ten years	243,083
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	104,069
Available for Sale, Fair Value, Due after one year to five years	827,738
Available for Sale, Fair Value, Due after five to ten years	258,591
Available for Sale, Fair Value, Due after ten years	215,204
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	81
Held to Maturity, Amortized Cost, Due after one year to five years	375,240
Held to Maturity, Amortized Cost, Due after five to ten years	491,449
Held to Maturity, Amortized Cost, Due after ten years	811,606
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	80
Held to Maturity, Fair Value, Due after one year to five years	351,956
Held to Maturity, Fair Value, Due after five to ten years	438,272
Held to Maturity, Fair Value, Due after ten years	729,196
Held to Maturity, Fair Value, Total	1,519,504
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	1,203
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	1,203	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	1,042
Debt Securities, Available-for-Sale, Excluding Accrued Interest	1,042	1,034
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member]
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, Excluding Accrued Interest, before Allowance for Credit Loss	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	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	195
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	195	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	0
Available for Sale, Amortized Cost, Due after ten years	40,483
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	40,483	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	0
Available for Sale, Fair Value, Due after ten years	37,889
Debt Securities, Available-for-Sale, Excluding Accrued Interest	37,889	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	29,669
Held to Maturity, Amortized Cost, Due after five to ten years	38,862
Held to Maturity, Amortized Cost, Due after ten years	453,090
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	28,418
Held to Maturity, Fair Value, Due after five to ten years	34,561
Held to Maturity, Fair Value, Due after ten years	387,445
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	521,621	535,971
Held to Maturity, Fair Value, Total	450,424	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	7,201
Available for Sale, Amortized Cost, Due after one year to five years	97,586
Available for Sale, Amortized Cost, Due after five to ten years	98,048
Available for Sale, Amortized Cost, Due after ten years	143,749
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss	346,584	359,068
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	7,051
Available for Sale, Fair Value, Due after one year to five years	89,002
Available for Sale, Fair Value, Due after five to ten years	84,449
Available for Sale, Fair Value, Due after ten years	125,520
Debt Securities, Available-for-Sale, Excluding Accrued Interest	306,022	313,688
Held to Maturity, Amortized Cost
Held to Maturity, Amortized Cost, Due in one year or less	81
Held to Maturity, Amortized Cost, Due after one year to five years	215,084
Held to Maturity, Amortized Cost, Due after five to ten years	446,707
Held to Maturity, Amortized Cost, Due after ten years	226,122
Held to Maturity, Fair Value
Held to Maturity, Fair Value, Due in one year or less	80
Held to Maturity, Fair Value, Due after one year to five years	204,705
Held to Maturity, Fair Value, Due after five to ten years	398,228
Held to Maturity, Fair Value, Due after ten years	212,541
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	887,994	898,927
Held to Maturity, Fair Value, Total	815,554	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	99,915
Available for Sale, Amortized Cost, Due after one year to five years	689,740
Available for Sale, Amortized Cost, Due after five to ten years	84,522
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	874,177	874,035
Available for Sale, Fair Value
Available for Sale, Fair Value, Due in one year or less	97,018
Available for Sale, Fair Value, Due after one year to five years	632,502
Available for Sale, Fair Value, Due after five to ten years	75,167
Available for Sale, Fair Value, Due after ten years	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	804,687	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	99,663
Held to Maturity, Amortized Cost, Due after five to ten years	991
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	89,875
Held to Maturity, Fair Value, Due after five to ten years	843
Held to Maturity, Fair Value, Due after ten years	0
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss	100,654	100,634
Held to Maturity, Fair Value, Total	$ 90,718	$ 88,879