Employee Benefit Plans - Schedule of Supplemental Executive Retirement Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amounts Recognized in the Balance Sheets [Abstract]
Other assets, deferred income tax benefit	$ 583	$ 479
Supplemental Executive Retirement Plan [Member]
Changes in Benefit Obligations [Roll Forward]
Benefit obligation, beginning	2,675	2,574	$ 2,485
Service cost	155	169	171
Interest cost	77	100	84
Actuarial gain	158	(20)	(18)
Benefits paid	(212)	(148)	(148)
Benefit obligation, ending	2,853	2,675	2,574
Funded status, ending	(2,853)	(2,675)	(2,574)
Changes in Plan Assets [Roll Forward]
Employer contributions	212	148	148
Benefits paid	(212)	(148)	(148)
Amounts Recognized in the Balance Sheets [Abstract]
Other assets, deferred income tax benefit	583	479	513
Other liabilities	2,853	2,675	2,574
Accumulated other comprehensive income	33	157	140
Amounts Recognized in Accumulated Other Comprehensive Income (Loss) [Abstract]
Net gain	18	176	155
Prior service cost	23	22	22
Deferred tax expense	(8)	(41)	(37)
Amount recognized	33	157	140
Components of Net Periodic Benefit Cost [Abstract]
Service cost	155	169	171
Interest cost	77	100	84
Amortization of prior service cost	1	1	1
Net periodic benefit cost	233	270	256
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income [Abstract]
Net gain	(158)	20	18
Amortization of prior service cost	1	1	1
Total recognized	(157)	21	19
Less: Income tax effect	(33)	4	4
Net amount recognized in other comprehensive income	(124)	17	15
Total recognized in net periodic benefit costs and other comprehensive income before income tax	$ 390	$ 249	$ 237
Weighted-Average Assumptions for Net Periodic Benefit Cost [Abstract]
Discount rate used for net periodic benefit cost	3.00%	4.00%	3.50%
Rate of compensation increase for net periodic benefit cost and benefit obligation	3.25%	3.25%	3.25%
Weighted-Average Assumptions [Abstract]
Discount rate used for benefit obligation	2.25%	3.00%	4.00%