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Securities (Schedule of Contractual Maturities of Securities) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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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

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