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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
Jun. 30, 2012
Dec. 31, 2011
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types $ 620,928 $ 743,934
1-4 family residential 4,018,858 3,921,216
Construction and other consumer real estate 327,867 305,873
Commercial and industrial 10,382,676 10,334,858
Home equity credit line 2,180,857 2,187,428
Bankcard and other revolving plans 284,112 291,018
Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 10,382,676 10,334,858
Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 133,241 126,468
Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 4,018,858 3,921,216
Construction and other consumer real estate 327,867 305,873
Home equity credit line 2,180,857 2,187,428
Bankcard and other revolving plans 284,112 291,018
Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 13,741 18,376
Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 74,935 90,857
Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 7,731 12,096
Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 1,256 346
Interest Rate Below Market [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 39,249 37,117
Maturity Or Term Extension [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 68,079 105,770
Principal Forgiveness [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 7,694 5,827
Payment Deferral [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 23,715 41,635
Other [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 146,755 [1] 161,849 [1]
Multiple Modification Types [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 335,436 [2] 391,736 [2]
Accruing [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 393,360 448,109
Accruing [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 96,503 85,968
Accruing [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 56,310 41,871
Accruing [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 40,193 44,097
Accruing [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 238,442 311,455
Accruing [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 113,356 98,266
Accruing [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 125,086 213,189
Accruing [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 58,415 50,686
Accruing [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 284 32
Accruing [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 55,562 46,400
Accruing [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 2,569 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 11,815 8,995
Accruing [Member] | Interest Rate Below Market [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,596 2,177
Accruing [Member] | Interest Rate Below Market [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 280 302
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 1,316 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 3,695 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 1,745 644
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 1,950 2,738
Accruing [Member] | Interest Rate Below Market [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 6,524 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 6,174 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 156 166
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 56,441 93,255
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 20,612 22,951
Accruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 5,382 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 15,230 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 28,421 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 26,539 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 1,882 33,885
Accruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 7,408 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 6,936 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 472 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 4,056 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 2,997 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 7 565
Accruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,990 3,027
Accruing [Member] | Principal Forgiveness [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,059 525
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 1,059 525
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 11,817 26,603
Accruing [Member] | Payment Deferral [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 9,550 2,963
Accruing [Member] | Payment Deferral [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 3,846 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 5,704 1,008
Accruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,267 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 59 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 2,208 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 100,533 [1] 122,586 [1]
Accruing [Member] | Other [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 31,736 [1] 32,874 [1]
Accruing [Member] | Other [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 27,194 [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 4,542 [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 64,619 [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 37,078 [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 27,541 [1] 54,031 [1]
Accruing [Member] | Other [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 4,178 [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 3,526 [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 652 [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 208,698 [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 33,009 [2] 24,966 [2]
Accruing [Member] | Multiple Modification Types [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 19,608 [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 13,401 [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 136,443 [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 47,928 [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 88,515 [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 39,246 [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 90 [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 37,867 [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 1,289 [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 227,568 295,825
Nonaccruing [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 78,212 69,860
Nonaccruing [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 37,655 29,635
Nonaccruing [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 40,557 40,225
Nonaccruing [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 127,790 200,243
Nonaccruing [Member] | Commercial Real Estate [Member] | Construction And Land Development [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 70,489 122,458
Nonaccruing [Member] | Commercial Real Estate [Member] | Term [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 57,301 77,785
Nonaccruing [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 21,566 25,722
Nonaccruing [Member] | Consumer [Member] | Home Equity Credit Line [Member]
    
Financing Receivable, Modifications [Line Items]    
Home equity credit line 128 517
Nonaccruing [Member] | Consumer [Member] | 1-4 Family Residential [Member]
    
Financing Receivable, Modifications [Line Items]    
1-4 family residential 17,821 22,995
Nonaccruing [Member] | Consumer [Member] | Construction And Other Consumer Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Construction and other consumer real estate 3,323 2,210
Nonaccruing [Member] | Consumer [Member] | Bankcard And Other Revolving Plans [Member]
    
Financing Receivable, Modifications [Line Items]    
Bankcard and other revolving plans 294  
Nonaccruing [Member] | Interest Rate Below Market [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 27,434 28,122
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 5,481 7,990
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 339 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 5,142 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 20,796 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 16,382 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 4,414 3,445
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 1,157 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 1,145 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 12 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 11,638 12,515
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 6,841 7,195
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 5,700 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 1,141 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 2,524 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 2,487 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 37 50
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,273 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 48 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 1,931 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 294  
Nonaccruing [Member] | Principal Forgiveness [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 3,638 1,673
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 3,327 715
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 2,643 0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial [Member] | Owner Occupied [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 684 715
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 311 939
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 311 939
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 11,898 15,032
Nonaccruing [Member] | Payment Deferral [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 9,414 8,004
Nonaccruing [Member] | Payment Deferral [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 526 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 8,888 6,575
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 2,484 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 2,484 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 46,222 [1] 39,263 [1]
Nonaccruing [Member] | Other [Member] | Commercial [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 25,594 [1] 25,454 [1]
Nonaccruing [Member] | Other [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 15,600 [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 9,994 [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 19,780 [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 8,194 [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 11,586 [1] 4,724 [1]
Nonaccruing [Member] | Other [Member] | Consumer [Member]
    
Financing Receivable, Modifications [Line Items]    
Recorded investment resulting from the following modification types 848 [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 848 [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 0 [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 126,738 [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 27,555 [2] 20,502 [2]
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial [Member] | Commercial And Industrial [Member]
    
Financing Receivable, Modifications [Line Items]    
Commercial and industrial 12,847 [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 14,708 [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 82,206 [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 43,426 [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 38,780 [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 16,977 [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 128 [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 15,469 [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]
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.