XML 99 R84.htm IDEA: XBRL DOCUMENT v3.19.1
Esop - Summary of Shares Held by Employee Stock Ownership Plan (ESOP) (Detail) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Earned ESOP shares 215,510 165,686
Unearned ESOP shares 382,691 434,548
Total ESOP shares 598,201 600,234
Share price at December 31, $ 13.29 $ 14.10
Fair value of unearned ESOP shares $ 5,085,963 $ 6,127,127