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Restricted Cash (Narrative) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Restricted Cash And Cash Equivalents Items Line Items    
Certificates Of Deposits Oriental International Banking $ 300 $ 300
Treasury Bill, Oriental Overseas Unit 325 325
Reserve required by local Goverment 219,700 189,200
Deposit pledged as collateral 3,030 3,030
Derivative    
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