Restricted Cash (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Restricted Cash And Cash Equivalents Items Line Items
Certificates Of Deposits Oriental International Banking	$ 300	$ 300
Treasury Bill, Oriental Overseas Unit	325
Reserve required by local Goverment	189,200	161,000
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