XML 78 R63.htm IDEA: XBRL DOCUMENT v3.8.0.1
Other Real Estate Owned - Summary of Changes in the Balance for OREO (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Real Estate [Abstract]    
Balance at the beginning of year, gross $ 250 $ 2,903
Transfers in 326 287
Charge-offs 0 (251)
Sales proceeds (441) (2,882)
Gain on disposition 191 193
Balance at the end of year, gross 326 250
Less: valuation allowance 0 0
Balance at the end of year, net $ 326 $ 250