Quarterly report pursuant to Section 13 or 15(d)

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - ALLL Attributable to Loans by Portfolio Segment (Details)

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - ALLL Attributable to Loans by Portfolio Segment (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment $ 588,049   $ 532,678      
Attributable to loans individually evaluated for impairment 28,849   62,436      
Total ALLL balance 616,898 $ 623,064 597,843 $ 591,938 $ 599,542 $ 605,196
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 65,115,025   49,027,030      
Individually evaluated for impairment 946,556   1,277,788      
Financing Receivable Evaluated For Impairment 66,215,276   50,341,099      
Commercial            
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment 414,549   368,723      
Attributable to loans individually evaluated for impairment 17,246     27,428    
Total ALLL balance 431,795 424,507 398,753 394,296 377,101 389,834
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 34,299,610   25,167,700      
Individually evaluated for impairment 470,134     626,010    
Financing Receivable Evaluated For Impairment 34,923,439   25,828,485      
Consumer            
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment 173,500   163,955      
Attributable to loans individually evaluated for impairment 11,603     35,008    
Total ALLL balance 185,103 $ 198,557 199,090 197,642 $ 222,441 $ 215,362
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 30,815,415   23,859,330      
Individually evaluated for impairment 476,422     651,778    
Financing Receivable Evaluated For Impairment 31,291,837   24,512,614      
Purchased credit-impaired            
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment 0   2,729      
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 153,695   $ 36,281      
Purchased credit-impaired | Commercial            
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment 0     2,602    
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 153,695     34,775    
Purchased credit-impaired | Consumer            
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment 0     127    
Portion of loan and lease ending balance:            
Collectively evaluated for impairment $ 0     $ 1,506