Annual report pursuant to Section 13 and 15(d)

ACQUISITION OF FIRSTMERIT CORPORATION - Narrative (Details)

v3.6.0.2
ACQUISITION OF FIRSTMERIT CORPORATION - Narrative (Details)
$ / shares in Units, $ in Thousands, shares in Millions
 3 Months Ended 12 Months Ended
Aug. 16, 2016
USD ($)
$ / shares
shares
Jul. 26, 2016
Branch
Dec. 31, 2016
USD ($)
state
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2016
USD ($)
state
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Aug. 15, 2016
$ / shares
Business Acquisition [Line Items]                            
Goodwill     $ 1,992,849       $ 676,869       $ 1,992,849 $ 676,869 $ 522,541  
Number of States in which Entity Operates | state     8               8      
Share Price | $ / shares                           $ 9.68
Net Income (Loss) Attributable to Parent     $ 238,963 $ 127,004 $ 174,540 $ 171,314 $ 178,309 $ 152,588 $ 196,206 $ 165,854 $ 711,821 692,957 $ 632,392  
Number of Branches to be Disposed | Branch   13                        
FirstMerit Bank                            
Business Acquisition [Line Items]                            
Business Combination, Consideration Transferred $ 3,700,000                          
Payments to acquired business in cash 836,879                          
Goodwill $ 1,320,818   1,300,000               1,300,000      
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Per Share | $ / shares $ 1.72                          
Business Combination, Consideration Transferred, Cash Paid for Each Share of Acquired Entity's Shares | $ / shares $ 5.00                          
Consideration transferred, equity interest issued and issuable $ 2,800,000                          
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares 285                          
Business Acquisition, Goodwill, Expected Tax Deductible Amount     339,000               $ 339,000      
Business Acquisition, Goodwill, Expected Tax Deductible Amount, Term 15 years                          
Common Stock | FirstMerit Bank                            
Business Acquisition [Line Items]                            
Consideration transferred, equity interest issued and issuable $ 2,766,773                          
Preferred Stock | FirstMerit Bank                            
Business Acquisition [Line Items]                            
Consideration transferred, equity interest issued and issuable $ 104,320                          
Core deposit intangible | FirstMerit Bank                            
Business Acquisition [Line Items]                            
Finite-Lived Intangible Asset, Useful Life                     10 years      
Amortization of Premiums and Accretion of Discounts on Acquired Loans, Securities, Deposits, and Long-term Debt | FirstMerit Bank                            
Business Acquisition [Line Items]                            
Revenues                     $ 12,000 18,000    
Amortization of Premiums and Accretion of Discounts on Previously Acquired Loans, Securities, and Deposits | FirstMerit Bank                            
Business Acquisition [Line Items]                            
Revenues                     34,000 79,000    
Amortization of Acquired Intangibles | FirstMerit Bank                            
Business Acquisition [Line Items]                            
Net Income (Loss) Attributable to Parent                     (28,000) $ (44,000)    
Acquisition-related Costs | FirstMerit Bank                            
Business Acquisition [Line Items]                            
Net Income (Loss) Attributable to Parent                     281,000      
Disposal Group, Held-for-sale, Not Discontinued Operations | Branches Sold In Connection with Acquisition of FirstMerit                            
Business Acquisition [Line Items]                            
Disposal Group, Including Discontinued Operation, Deposit Liabilities     620,000               620,000      
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net     $ 106,000               $ 106,000