XML 100 R69.htm IDEA: XBRL DOCUMENT v3.19.2
Repurchase Agreements - Additional Information (Detail) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Securities Financing Transaction [Line Items]    
Pledged securities with carrying value to collateralize its repurchase agreements $ 267.9 $ 279.5