Securities - Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value
Fair Value, Less than 12 Months	$ 49,243	$ 23,842
Fair Value, 12 Months or Longer	2,184	2,000
Fair Value, Total	51,427	25,842
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses
Unrealized Losses, Less than 12 Months	(1,236)	(97)
Unrealized Losses, 12 Months or Longer	(41)	(227)
Unrealized Losses, Total	(1,277)	(324)
Corporate bonds
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value
Fair Value, Less than 12 Months	1,976	4,240
Fair Value, 12 Months or Longer	2,184	2,000
Fair Value, Total	4,160	6,240
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses
Unrealized Losses, Less than 12 Months	(24)	(10)
Unrealized Losses, 12 Months or Longer	(41)	(227)
Unrealized Losses, Total	(65)	(237)
Mortgage-backed securities
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value
Fair Value, Less than 12 Months	43,337	17,504
Fair Value, Total	43,337	17,504
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses
Unrealized Losses, Less than 12 Months	(1,136)	(61)
Unrealized Losses, Total	(1,136)	(61)
Collateralized mortgage obligations
Available-for-sale securities, Continuous Unrealized Loss Position, Fair Value
Fair Value, Less than 12 Months	3,930	2,098
Fair Value, Total	3,930	2,098
Available-for-sale securities, Continuous Unrealized Loss Position, Gross Unrealized Losses
Unrealized Losses, Less than 12 Months	(76)	(26)
Unrealized Losses, Total	$ (76)	$ (26)