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Loans And Allowance For Credit Losses (Summary Of Selected Information On TDRs That Includes Recorded Investment On An Accruing And Nonaccruing Basis By Loan Class And Modification Type) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types $ 678,223 $ 743,934
1-4 family residential 3,874,533 3,921,216
Construction and other consumer real estate 316,257 305,873
Commercial and industrial 10,157,262 10,334,858
Leasing 393,916 379,709
Municipal 440,747 441,241
Home equity credit line 2,167,099 2,187,428
Bankcard and other revolving plans 273,591 291,018
Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 10,157,262 10,334,858
Leasing 393,916 379,709
Municipal 440,747 441,241
Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 149,337 126,468
Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 3,874,533 3,921,216
Construction and other consumer real estate 316,257 305,873
Home equity credit line 2,167,099 2,187,428
Bankcard and other revolving plans 273,591 291,018
Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 17,425 18,376
Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 86,910 90,857
Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 8,060 12,096
Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 537 346
Interest Rate Below Market [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 46,875 37,117
Maturity Or Term Extension [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 96,453 105,770
Principal Forgiveness [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 9,753 5,827
Payment Deferral [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 48,956 41,635
Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 155,096 [1] 161,849 [1]
Multiple Modification Types [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 321,090 [2] 391,736 [2]
Accruing [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 401,554 448,109
Accruing [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 95,722 85,968
Accruing [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 59,385 41,871
Accruing [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 36,337 44,097
Accruing [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 255,499 311,455
Accruing [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 90,054 98,266
Accruing [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 165,445 213,189
Accruing [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 50,333 50,686
Accruing [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 222 32
Accruing [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 47,578 46,400
Accruing [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 2,533 4,226
Accruing [Member] | Consumer [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   28
Accruing [Member] | Interest Rate Below Market [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 7,224 8,995
Accruing [Member] | Interest Rate Below Market [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,622 2,177
Accruing [Member] | Interest Rate Below Market [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 288 302
Accruing [Member] | Interest Rate Below Market [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,334 1,875
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,952 3,382
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,055 644
Accruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,897 2,738
Accruing [Member] | Interest Rate Below Market [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,650 3,436
Accruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 194  
Accruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 2,297 3,270
Accruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 159 166
Accruing [Member] | Maturity Or Term Extension [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 78,268 93,255
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 20,548 22,951
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 5,988 7,727
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 14,560 15,224
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 55,364 67,169
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 32,561 33,284
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 22,803 33,885
Accruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,356 3,135
Accruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 1,945 1,663
Accruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 411 1,444
Accruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   28
Accruing [Member] | Principal Forgiveness [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,076 4,154
Accruing [Member] | Principal Forgiveness [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   37
Accruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   37
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 3,011 3,592
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   565
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 3,011 3,027
Accruing [Member] | Principal Forgiveness [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,065 525
Accruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 1,065 525
Accruing [Member] | Payment Deferral [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 34,449 26,603
Accruing [Member] | Payment Deferral [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 9,570 2,963
Accruing [Member] | Payment Deferral [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 3,831 1,955
Accruing [Member] | Payment Deferral [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 5,739 1,008
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 24,879 23,640
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 24,879 23,640
Accruing [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 92,415 [1] 122,586 [1]
Accruing [Member] | Other [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 33,013 [1] 32,874 [1]
Accruing [Member] | Other [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 28,663 [1] 27,370 [1]
Accruing [Member] | Other [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,350 [1] 5,504 [1]
Accruing [Member] | Other [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 52,479 [1] 82,942 [1]
Accruing [Member] | Other [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 28,557 [1] 28,911 [1]
Accruing [Member] | Other [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 23,922 [1] 54,031 [1]
Accruing [Member] | Other [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 6,923 [1] 6,770 [1]
Accruing [Member] | Other [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   32 [1]
Accruing [Member] | Other [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 6,269 [1] 6,103 [1]
Accruing [Member] | Other [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 654 [1] 635 [1]
Accruing [Member] | Multiple Modification Types [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 185,122 [2] 192,516 [2]
Accruing [Member] | Multiple Modification Types [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 30,969 [2] 24,966 [2]
Accruing [Member] | Multiple Modification Types [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 20,615 [2] 4,517 [2]
Accruing [Member] | Multiple Modification Types [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 10,354 [2] 20,449 [2]
Accruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 116,814 [2] 130,730 [2]
Accruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 27,881 [2] 34,862 [2]
Accruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 88,933 [2] 95,868 [2]
Accruing [Member] | Multiple Modification Types [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 37,339 [2] 36,820 [2]
Accruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 28 [2]  
Accruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 36,002 [2] 34,839 [2]
Accruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 1,309 [2] 1,981 [2]
Nonaccruing [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 276,669 295,825
Nonaccruing [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 87,748 69,860
Nonaccruing [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 43,783 29,635
Leasing 249  
Nonaccruing [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 43,716 40,225
Nonaccruing [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 167,152 200,243
Nonaccruing [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 82,115 122,458
Nonaccruing [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 85,037 77,785
Nonaccruing [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 21,769 25,722
Nonaccruing [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 64 517
Nonaccruing [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 18,435 22,995
Nonaccruing [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 3,270 2,210
Nonaccruing [Member] | Interest Rate Below Market [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 39,651 28,122
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 8,714 7,990
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 3,227 3,526
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 5,487 4,464
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 29,553 18,533
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 24,970 15,088
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,583 3,445
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,384 1,599
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line   195
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 1,368 1,386
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 16 18
Nonaccruing [Member] | Maturity Or Term Extension [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 18,185 12,515
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 7,278 7,195
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 6,126 6,094
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,152 1,101
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 8,950 3,398
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 8,906 3,348
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 44 50
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,957 1,922
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 83 85
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 1,874 1,837
Nonaccruing [Member] | Principal Forgiveness [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 5,677 1,673
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 5,354 715
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 4,654  
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 700 715
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 11 19
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 11 19
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 312 939
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 312 939
Nonaccruing [Member] | Payment Deferral [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 14,507 15,032
Nonaccruing [Member] | Payment Deferral [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 9,623 8,004
Nonaccruing [Member] | Payment Deferral [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 588 1,429
Nonaccruing [Member] | Payment Deferral [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 9,035 6,575
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,884 6,310
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   2,060
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,884 4,250
Nonaccruing [Member] | Payment Deferral [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   718
Nonaccruing [Member] | Payment Deferral [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential   718
Nonaccruing [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 62,681 [1] 39,263 [1]
Nonaccruing [Member] | Other [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 25,566 [1] 25,454 [1]
Nonaccruing [Member] | Other [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 15,318 [1] 8,384 [1]
Nonaccruing [Member] | Other [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 10,248 [1] 17,070 [1]
Nonaccruing [Member] | Other [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 36,164 [1] 12,165 [1]
Nonaccruing [Member] | Other [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 16,092 [1] 7,441 [1]
Nonaccruing [Member] | Other [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 20,072 [1] 4,724 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 951 [1] 1,644 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line   253 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 951 [1] 1,391 [1]
Nonaccruing [Member] | Multiple Modification Types [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 135,968 [2] 199,220 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 31,213 [2] 20,502 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 13,870 [2] 10,202 [2]
Leasing 249 [2]  
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 17,094 [2] 10,300 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 87,590 [2] 159,818 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 32,136 [2] 94,502 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 55,454 [2] 65,316 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 17,165 [2] 18,900 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 64 [2] 69 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 15,721 [2] 18,476 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate $ 1,380 [2] $ 355 [2]
[1] Includes TDRs that resulted from other modification types including, but not limited to, a legal judgment awarded on different terms, a bankruptcy plan confirmed on different terms, a settlement that includes the delivery of collateral in exchange for debt reduction, etc.
[2] Includes TDRs that resulted from a combination of any of the previous modification types.