Restriction on Cash and Due From Banks (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Restricted Cash and Cash Equivalents Items [Line Items]
Cash balance, Federal Home Loan Bank And Federal Reserve Bank	$ 5,826
Cash reserve with Federal Reserve Bank	14,522
Interest-bearing Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Cash amount that exceeded federally insured limits	$ 128,127