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Restricted Cash (Narrative) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Restricted Cash And Cash Equivalents Items [Line Items]    
Certificates Of Deposits Oriental International Banking $ 305 $ 300
Treasury Bill, Oriental Overseas Unit 325 325
Reserve required by local Goverment 211,600 189,200
Deposit pledged as collateral 3,030 3,030
Derivative [Member]    
Restricted Cash And Cash Equivalents Items [Line Items]    
Deposit pledged as collateral 1,980 1,980
Residential Loans Sold with Recourse [Member]    
Restricted Cash And Cash Equivalents Items [Line Items]    
Deposit pledged as collateral $ 1,050 $ 1,050