Mortgage Banking and Servicing Rights (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Mortgage Banking and Servicing Rights [Abstract]
Net gain on sale of mortgage loans held for sale		$ 7,226	$ 1,746	$ 1,288
Net loan servicing income (expense) [Abstract]
Servicing fees		1,515	1,297	1,275
Late fees		52	72	73
Ancillary fees		1,310	190	282
Fair value adjustments		(1,064)	(975)	(343)
Net loan servicing income		1,813	584	1,287
Mortgage banking income		9,039	2,330	2,575
Loan service for benefit of others		650,000	486,000	462,000
Custodial escrow balance		2,000	1,400	1,000
Activity for capitalized mortgage servicing rights using fair value method [Roll Forward]
Fair value of MSRs, beginning of year		3,263	3,607	3,484
New servicing assets created		1,869	631	466
Change in fair value during the year due to:
Time decay	[1]	(135)	(167)	(189)
Payoffs	[2]	(766)	(293)	(227)
Changes in valuation inputs or assumptions	[3]	(163)	(515)	73
Fair value of MSRs, end of year		$ 4,068	$ 3,263	$ 3,607
Discount rate of servicing assets and servicing liabilities		10.10%	10.10%	10.10%
Weighted average default rates		1.67%	2.69%	2.57%
Prepayment speeds generated using Andrew Davidson Prepayment Model		15.70%	11.70%	9.50%

[1] Represents decrease in value due to regularly scheduled loan principal payments and partial loan paydowns.

[2] Represents decrease in value due to loans that paid off during the period.

[3] Represents change in value resulting from market-driven changes in interest rates.