Securities, Held-to-maturity Securities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($) security
Amortized cost and fair value of investment securities held to maturity [Abstract]
Amortized Cost	$ 25,960	$ 38,912
Unrealized Gains	228	68
Unrealized Losses	30	768
Fair Value	$ 26,158	$ 38,212
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Number Of Position[Abstract]
Less than 12 Months Securities | security	2
12 Months or Longer Securities | security	5	28
Total Securities | security	7	28
Fair Value [Abstract]
Less than 12 Months, Fair Value	$ 2,544
12 Months or More, Fair Value	4,241	$ 33,938
Total, Estimated Fair Value	6,785	33,938
Unrealized Losses [Abstract]
Less than 12 Months, Unrealized Losses	17
12 Months or More, Unrealized Losses	13	768
Total, Unrealized Losses	30	768
Expected losses realized on security maturities	0
U.S. Treasury Securities [Member]
Amortized cost and fair value of investment securities held to maturity [Abstract]
Amortized Cost	994	1,991
Unrealized Gains	14	17
Fair Value	1,008	2,008
U.S. Government Agency Notes [Member]
Amortized cost and fair value of investment securities held to maturity [Abstract]
Amortized Cost	4,986	11,992
Unrealized Gains	100	45
Unrealized Losses	5	92
Fair Value	$ 5,081	$ 11,945
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Number Of Position[Abstract]
12 Months or Longer Securities | security	3	10
Total Securities | security	3	10
Fair Value [Abstract]
12 Months or More, Fair Value	$ 3,003	$ 9,927
Total, Estimated Fair Value	3,003	9,927
Unrealized Losses [Abstract]
12 Months or More, Unrealized Losses	5	92
Total, Unrealized Losses	5	92
Mortgage-backed Securities [Member]
Amortized cost and fair value of investment securities held to maturity [Abstract]
Amortized Cost	19,980	24,929
Unrealized Gains	114	6
Unrealized Losses	25	676
Fair Value	$ 20,069	$ 24,259
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Number Of Position[Abstract]
Less than 12 Months Securities | security	2
12 Months or Longer Securities | security	2	18
Total Securities | security	4	18
Fair Value [Abstract]
Less than 12 Months, Fair Value	$ 2,544
12 Months or More, Fair Value	1,238	$ 24,011
Total, Estimated Fair Value	3,782	24,011
Unrealized Losses [Abstract]
Less than 12 Months, Unrealized Losses	17
12 Months or More, Unrealized Losses	8	676
Total, Unrealized Losses	$ 25	$ 676