Quarterly report pursuant to Section 13 or 15(d)

ACQUISITION OF FIRSTMERIT CORPORATION - Pro Forma (Details)

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ACQUISITION OF FIRSTMERIT CORPORATION - Pro Forma (Details) - FirstMerit Bank - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Business Acquisition [Line Items]        
Net income, actual from acquisition date     $ 55,353  
Unaudited Pro Forma for Net Income $ 144,292 $ 191,507 570,180 $ 627,104
Net interest income        
Business Acquisition [Line Items]        
Revenue, actual from acquisition date     93,256  
Unaudited Pro Forma for Revenue 706,671 657,730 2,053,093 1,940,746
Noninterest income        
Business Acquisition [Line Items]        
Revenue, actual from acquisition date     30,556  
Unaudited Pro Forma for Revenue $ 334,630 $ 323,063 $ 977,153 $ 965,923