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Loans Receivable (Troubled debt restructurings, Rolling Twelve Months) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
number
Dec. 31, 2015
USD ($)
number
Dec. 31, 2014
USD ($)
number
Mortgage Loan [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Contracts | number 19 65 15
Recored Investment | $ $ 2,241 $ 7,387 $ 1,700
Commercial Loan [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Contracts | number 2 0 0
Recored Investment | $ $ 157 $ 0 $ 0
Consumer Loan [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Contracts | number 11 8 5
Recored Investment | $ $ 126 $ 177 $ 37
Auto [Member]      
Financing Receivable, Modifications [Line Items]      
Number of Contracts | number 0 1 0
Recored Investment | $ $ 0 $ 64 $ 0