XML 52 R40.htm IDEA: XBRL DOCUMENT v3.20.2
Investment securities - Pledged Securities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Available-for-sale and Held-to-maturity securities    
Carrying value of securities pledged us-gaap:AssetPledgedAsCollateralMember us-gaap:AssetPledgedAsCollateralMember
Collateral Pledged    
Available-for-sale and Held-to-maturity securities    
Carrying value of securities pledged $ 131,913 $ 157,047