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Junior Subordinated Debentures (Details) - Junior Subordinated Debt [Member] - Capital Securities [Member]
$ in Millions
12 Months Ended
Sep. 21, 2006
USD ($)
Dec. 31, 2016
QuarterlyPeriods
Dec. 31, 2015
Debt Instrument [Line Items]      
Proceeds from Issuance of Subordinated Long-term Debt | $ $ 5.2    
Annual Distribution Rate   2.21%  
Floating basis spread on variable rate   1.70% 1.70%
Debt Instrument, Rights to Defer Interest Payments, Consecutive Quarterly Periods | QuarterlyPeriods   20