Consolidated Balance Sheets (Parenthetical) shares in Thousands, $ in Thousands	Dec. 31, 2019 USD ($) $ / shares shares
Statement Of Financial Position [Abstract]
Allowance for loan and lease losses | $	$ 2,000
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.01
Common Stock, Shares Authorized	90,000,000
Common Stock, Shares, Issued	4,876,677
Common Stock, Shares, Outstanding	4,876,677
Unallocated common stock of Employee Stock Ownership Plan	168,507