Quarterly report pursuant to Section 13 or 15(d)

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Certain Loans Acquired Accretable Yield Roll (Details)

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Certain Loans Acquired Accretable Yield Roll (Details) - FirstMerit Corporation - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]    
Balance, beginning of period $ 0 $ 0
Impact of acquisition/purchase on August 16, 2016 17,717 17,717
Accretion (1,091) (1,091)
Reclassification (to) from nonaccretable difference 3,308 3,308
Balance, end of period $ 19,934 $ 19,934