Fair Value of Financial Instruments, Fair Values of Financial Instruments, Assets, Quantitative Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($) item	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
MSRs [Member]
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Fair value estimate	$ 316	$ 482	$ 316	$ 482	$ 343	$ 437	$ 501	$ 477
Valuation adjustment	$ (27)	(19)	$ (121)	5
MSRs [Member] | Recurring [Member] | Level 3 [Member] | Weighted Average [Member] | Measurement Input, Constant Prepayment Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
MSRs, Measurement input | item	0.136		0.136			0.098
IRLCs [Member]
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Fair value estimate	$ 180	187	$ 180	187	$ 345	$ 100	$ 168	$ 22
Valuation adjustment	$ (165)	$ 19	$ 80	$ 165
Impaired loans [Member] | Nonrecurring [Member] | Minimum [Member] | Measurement Input, Discount Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Impaired loan, measurement input | item	0.00		0.00
Impaired loans [Member] | Nonrecurring [Member] | Maximum [Member] | Measurement Input, Discount Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Impaired loan, measurement input | item	1.60		1.60
Impaired loans [Member] | Nonrecurring [Member] | Weighted Average [Member] | Measurement Input, Discount Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Impaired loan, measurement input | item	0.08		0.08			0.067
Impaired loans [Member] | Nonrecurring [Member] | Level 3 [Member]
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Fair value estimate	$ 4,849		$ 4,849			$ 5,678
Impaired loans [Member] | Nonrecurring [Member] | Carrying Value [Member]
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Fair value estimate	$ 4,849		$ 4,849			$ 5,678
Foreclosed real estate [Member] | Nonrecurring [Member] | Minimum [Member] | Measurement Input, Discount Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Real estate acquired through foreclosure, measurement input	0.00		0.00			0.00
Foreclosed real estate [Member] | Nonrecurring [Member] | Maximum [Member] | Measurement Input, Discount Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Real estate acquired through foreclosure, measurement input	0.16		0.16			0.16
Foreclosed real estate [Member] | Nonrecurring [Member] | Weighted Average [Member] | Measurement Input, Discount Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Real estate acquired through foreclosure, measurement input | item	0.15		0.15
Foreclosed real estate [Member] | Nonrecurring [Member] | Level 3 [Member]
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Fair value estimate	$ 551		$ 551
Foreclosed real estate [Member] | Nonrecurring [Member] | Carrying Value [Member]
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Fair value estimate	551		551
Market Approach [Member] | MSRs [Member] | Recurring [Member] | Level 3 [Member]
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Fair value estimate	316		316			$ 437
Market Approach [Member] | IRLCs [Member] | Recurring [Member] | Level 3 [Member]
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Fair value estimate	$ 180		$ 180			$ 100
Market Approach [Member] | IRLCs [Member] | Recurring [Member] | Level 3 [Member] | Minimum [Member] | Measurement Input, Pull Through Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Interest-rate lock commitments, measurement input | item	0.8		0.8			0.7
Market Approach [Member] | IRLCs [Member] | Recurring [Member] | Level 3 [Member] | Maximum [Member] | Measurement Input, Pull Through Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Interest-rate lock commitments, measurement input | item	0.950		0.950			0.950
Market Approach [Member] | IRLCs [Member] | Recurring [Member] | Level 3 [Member] | Weighted Average [Member] | Measurement Input, Pull Through Rate
Quantitative Information about Level 3 Fair Value Measurements [Abstract]
Interest-rate lock commitments, measurement input | item	0.90		0.90			0.84