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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
Sep. 30, 2012
Dec. 31, 2011
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types $ 628,144 $ 743,934
1-4 family residential 4,181,002 3,921,216
Construction and other consumer real estate 320,087 305,873
Commercial and industrial 10,748,266 10,334,858
Home equity credit line 2,175,338 2,187,428
Bankcard and other revolving plans 294,827 291,018
Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 10,748,266 10,334,858
Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 103,206 126,468
Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 4,181,002 3,921,216
Construction and other consumer real estate 320,087 305,873
Home equity credit line 2,175,338 2,187,428
Bankcard and other revolving plans 294,827 291,018
Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 11,867 18,376
Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 65,736 90,857
Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 6,110 12,096
Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 871 346
Interest Rate Below Market [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 39,916 37,117
Maturity Or Term Extension [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 71,130 105,770
Principal Forgiveness [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 6,837 5,827
Payment Deferral [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 23,116 41,635
Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 155,479 [1] 161,849 [1]
Multiple Modification Types [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 331,666 [2] 391,736 [2]
Accruing [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 421,055 448,109
Accruing [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 117,165 85,968
Accruing [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 80,724 41,871
Accruing [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 36,441 44,097
Accruing [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 246,757 311,455
Accruing [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 87,736 98,266
Accruing [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 159,021 213,189
Accruing [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 57,133 50,686
Accruing [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 273 32
Accruing [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 53,222 46,400
Accruing [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 3,638 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 16,958 8,995
Accruing [Member] | Interest Rate Below Market [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,601 2,177
Accruing [Member] | Interest Rate Below Market [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 2,574 302
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 2,027 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 5,879 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 1,734 644
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 4,145 2,738
Accruing [Member] | Interest Rate Below Market [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 6,478 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 0
Accruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 6,133 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 151 166
Accruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   0
Accruing [Member] | Maturity Or Term Extension [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 56,648 93,255
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 21,726 22,951
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 6,873 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 14,853 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 28,191 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 26,500 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 1,691 33,885
Accruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 6,731 3,135
Accruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 0
Accruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 6,262 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 469 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 4,032 4,154
Accruing [Member] | Principal Forgiveness [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 37
Accruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 0 0
Accruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 37
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,978 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 4 565
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,974 3,027
Accruing [Member] | Principal Forgiveness [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,054 525
Accruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 0
Accruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 1,054 525
Accruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 0 0
Accruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   0
Accruing [Member] | Payment Deferral [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 9,839 26,603
Accruing [Member] | Payment Deferral [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 7,599 2,963
Accruing [Member] | Payment Deferral [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 3,547 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 4,052 1,008
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,240 23,640
Accruing [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 58 0
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,182 23,640
Accruing [Member] | Payment Deferral [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 0
Accruing [Member] | Payment Deferral [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 0
Accruing [Member] | Payment Deferral [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 0 0
Accruing [Member] | Payment Deferral [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 0 0
Accruing [Member] | Payment Deferral [Member] | Consumer [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   0
Accruing [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 106,555 [1] 122,586 [1]
Accruing [Member] | Other [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 24,787 [1] 32,874 [1]
Accruing [Member] | Other [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 20,510 [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 4,277 [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 77,309 [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 19,181 [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 58,128 [1] 54,031 [1]
Accruing [Member] | Other [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,459 [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 0 [1] 32 [1]
Accruing [Member] | Other [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 3,817 [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 642 [1] 635 [1]
Accruing [Member] | Other [Member] | Consumer [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   0 [1]
Accruing [Member] | Multiple Modification Types [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 227,023 [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 58,452 [2] 24,966 [2]
Accruing [Member] | Multiple Modification Types [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 47,220 [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 11,232 [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 130,160 [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 40,259 [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 89,901 [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 38,411 [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 79 [2] 0 [2]
Accruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 35,956 [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 2,376 [2] 1,981 [2]
Accruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types   0 [2]
Nonaccruing [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 207,089 295,825
Nonaccruing [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 70,151 69,860
Nonaccruing [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 25,583 29,635
Nonaccruing [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 44,568 40,225
Nonaccruing [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 115,316 200,243
Nonaccruing [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 73,223 122,458
Nonaccruing [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 42,093 77,785
Nonaccruing [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 21,622 25,722
Nonaccruing [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 127 517
Nonaccruing [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 18,886 22,995
Nonaccruing [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 2,325 2,210
Nonaccruing [Member] | Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 284  
Nonaccruing [Member] | Interest Rate Below Market [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 22,958 28,122
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,580 7,990
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 331 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 4,249 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 17,235 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 13,991 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 3,244 3,445
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,143 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 0 195
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 1,134 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 9 18
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 0  
Nonaccruing [Member] | Maturity Or Term Extension [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 14,482 12,515
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 8,813 7,195
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 4,597 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 4,216 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 2,986 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 2,426 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 560 50
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,683 1,922
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 0 0
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 668 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 1,731 1,837
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 284  
Nonaccruing [Member] | Principal Forgiveness [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,805 1,673
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,496 715
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 1,827 0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 669 715
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 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 0 19
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 0
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 309 939
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 0 0
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 309 939
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 0 0
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 0  
Nonaccruing [Member] | Payment Deferral [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 13,277 15,032
Nonaccruing [Member] | Payment Deferral [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 11,124 8,004
Nonaccruing [Member] | Payment Deferral [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 802 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 10,322 6,575
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,153 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 0 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 2,153 4,250
Nonaccruing [Member] | Payment Deferral [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 0 718
Nonaccruing [Member] | Payment Deferral [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 0 0
Nonaccruing [Member] | Payment Deferral [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 0 718
Nonaccruing [Member] | Payment Deferral [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 0 0
Nonaccruing [Member] | Payment Deferral [Member] | Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 0  
Nonaccruing [Member] | Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 48,924 [1] 39,263 [1]
Nonaccruing [Member] | Other [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 17,053 [1] 25,454 [1]
Nonaccruing [Member] | Other [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 8,273 [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 8,780 [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 29,786 [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 17,970 [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 11,816 [1] 4,724 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,085 [1] 1,644 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 0 [1] 253 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 1,755 [1] 1,391 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 330 [1] 0 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 0 [1]  
Nonaccruing [Member] | Multiple Modification Types [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 104,643 [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 26,085 [2] 20,502 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 9,753 [2] 10,202 [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 16,332 [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 63,156 [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 38,836 [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 24,320 [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 15,402 [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 127 [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 15,020 [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 255 [2] 355 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans $ 0 [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.