Goodwill and CDI - Amortization Expense (Details) - Core Deposits $ in Thousands	Sep. 30, 2020 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 361
Finite-Lived Intangible Assets, Amortization Expense, Year Two	316
Finite-Lived Intangible Assets, Amortization Expense, Year Three	271
Finite-Lived Intangible Assets, Amortization Expense, Year Four	226
Finite-Lived Intangible Assets, Amortization Expense, Year Five	180
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	271
Finite-Lived Intangible Assets, Net	$ 1,625