XML 110 R70.htm IDEA: XBRL DOCUMENT v3.20.1
Troubled Debt Restructurings (Loans By Class of Financing Receivable Modified as TDRs) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
contract
Dec. 31, 2018
USD ($)
contract
Dec. 31, 2017
USD ($)
contract
Troubled Debt Restructuring, Subsequent Periods [Line Items]      
Number of Contracts 18 19  
Troubled Debt Restructurings Within Previous Twelve Months [Member]      
Troubled Debt Restructuring, Subsequent Periods [Line Items]      
Number of Contracts 1 0 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $ $ 72 $ 0 $ 0
Residential Single Family [Member] | Troubled Debt Restructurings Within Previous Twelve Months [Member]      
Troubled Debt Restructuring, Subsequent Periods [Line Items]      
Number of Contracts 1    
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $ $ 72