XML 117 R72.htm IDEA: XBRL DOCUMENT v3.19.3
Securities Held-to-Maturity - Schedule of Maturity Profile of Securities Held-to-Maturity (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]    
Held-to-maturity due one year through five years $ 2,000  
Held-to-maturity due five years through ten years 7,494 $ 7,521
Held-to-maturity due over ten years 8,302 12,659
Held-to-maturity cost or amortized cost $ 17,796 $ 20,180