Annual report pursuant to Section 13 and 15(d)

Deposits - Additional Information (Detail)

v3.8.0.1
Deposits - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Banking and Thrift [Abstract]    
Accrued interest payable on deposits $ 5.3 $ 2.6
Total deposits reclassified to loans due to overdrafts $ 1.5 $ 1.2