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Allowance For Loan Losses (Rollforward Of The Allowance For Loan Losses By Portfolio Segment) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning Balance $ 202,068 $ 210,242  
Charge-offs (8,413) (17,612)  
Recoveries 9,313 8,404  
Provision for loan losses (1,000) 3,000  
Ending Balance 201,968 204,034  
Allowance - individually evaluated for impairment 44,322 57,876  
Allowance - collectively evaluated for impairment 157,056 145,010  
Allowance - purchased credit impaired loans 590 1,148 $ 700
Individually evaluated for impairment 283,550 312,762  
Collectively evaluated for impairment 18,762,625 17,231,978  
Purchase credit impaired loans - recorded investment 43,899 30,254  
Loans, net of unearned income 19,090,074 [1] 17,574,994 19,589,520 [1]
Commercial Financial And Industrial Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning Balance 89,398 73,637  
Charge-offs (600) (6,525)  
Recoveries 1,676 780  
Provision for loan losses 2,633 12,995  
Ending Balance 93,107 80,887  
Allowance - individually evaluated for impairment 3,775 9,148  
Allowance - collectively evaluated for impairment 89,142 71,615  
Allowance - purchased credit impaired loans 190 124  
Individually evaluated for impairment 44,970 44,465  
Collectively evaluated for impairment 11,620,748 10,181,677  
Purchase credit impaired loans - recorded investment 38,278 13,041  
Loans, net of unearned income 11,703,996 10,239,183 12,148,087
Commercial Real Estate Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning Balance 33,852 25,159  
Charge-offs 0 (642)  
Recoveries 221 222  
Provision for loan losses (3,185) 887  
Ending Balance 30,888 25,626  
Allowance - individually evaluated for impairment 192 488  
Allowance - collectively evaluated for impairment 30,646 24,840  
Allowance - purchased credit impaired loans 50 298  
Individually evaluated for impairment 3,096 8,950  
Collectively evaluated for impairment 2,166,069 1,826,677  
Purchase credit impaired loans - recorded investment 4,146 12,942  
Loans, net of unearned income 2,173,311 1,848,569 2,135,523
Consumer Real Estate Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning Balance 50,357 80,614  
Charge-offs (3,849) (6,926)  
Recoveries 5,676 5,735  
Provision for loan losses (2,504) (12,102)  
Ending Balance 49,680 67,321  
Allowance - individually evaluated for impairment 28,701 31,119  
Allowance - collectively evaluated for impairment 20,629 35,477  
Allowance - purchased credit impaired loans 350 725  
Individually evaluated for impairment 146,472 162,128  
Collectively evaluated for impairment 4,308,917 4,523,885  
Purchase credit impaired loans - recorded investment 1,422 4,217  
Loans, net of unearned income 4,456,811 [2] 4,690,230 4,523,752 [2]
Permanent Mortgage Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning Balance 16,289 18,947  
Charge-offs (483) (112)  
Recoveries 903 779  
Provision for loan losses (816) (860)  
Ending Balance 15,893 18,754  
Allowance - individually evaluated for impairment 11,532 16,975  
Allowance - collectively evaluated for impairment 4,361 1,779  
Allowance - purchased credit impaired loans 0 0  
Individually evaluated for impairment 88,743 96,874  
Collectively evaluated for impairment 320,492 345,917  
Purchase credit impaired loans - recorded investment 0 0  
Loans, net of unearned income 409,235 442,791 423,125
Credit Card & Other      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Beginning Balance 12,172 11,885  
Charge-offs (3,481) (3,407)  
Recoveries 837 888  
Provision for loan losses 2,872 2,080  
Ending Balance 12,400 11,446  
Allowance - individually evaluated for impairment 122 146  
Allowance - collectively evaluated for impairment 12,278 11,299  
Allowance - purchased credit impaired loans 0 1  
Individually evaluated for impairment 269 345  
Collectively evaluated for impairment 346,399 353,822  
Purchase credit impaired loans - recorded investment 53 54  
Loans, net of unearned income $ 346,721 $ 354,221 $ 359,033
[1]

March 31, 2017 and December 31, 2016 include $30.3 million and $28.5 million, respectively, of held-to-maturity consumer mortgage loans se cured by residential real estate properties in process of foreclosure.

[2]

Balances as of March 3 1 , 201 7 and December 31, 201 6 , include $ 32 . 5 million and $ 35 . 9 million of restricted real estate loans, respectively. See Note 13 - Variable Interest Entities for additional information.