Investment Securities - Continuous Unrealized Loss (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Fair value, less than 12 months					$ 43,337,000
Unrealized loss, less than 12 months					(153,000)
Fair value, 12 months or more					8,848,000
Unrealized loss, 12 months or more					(90,000)
Total fair value					52,185,000
Total unrealized loss					(243,000)
OTTI Loss, AFS	$ 0	$ 0	$ 0	$ 0
Sale of certain investments securities	5,100,000
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair value, less than 12 months	6,768,000		6,768,000		43,337,000
Unrealized loss, less than 12 months	(45,000)		(45,000)		(153,000)
Fair value, 12 months or more	1,371,000		1,371,000		8,735,000
Unrealized loss, 12 months or more	(4,000)		(4,000)		(88,000)
Total fair value	8,139,000		8,139,000		52,072,000
Total unrealized loss	$ (49,000)		$ (49,000)		(241,000)
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Fair value, less than 12 months					0
Unrealized loss, less than 12 months					0
Fair value, 12 months or more					113,000
Unrealized loss, 12 months or more					(2,000)
Total fair value					113,000
Total unrealized loss					$ (2,000)