Goodwill and Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2021	Dec. 31, 2020	Jan. 01, 2020
Finite-lived Intangible Assets [Roll Forward]
Acquisition of PFG	$ 2,497
Balance, gross core deposit intangible	17,047
Finite Lived Intangible Assets Accumulated Amortization [Abstract]
Gross Carrying Amount	17,047		$ 17,047	$ 14,550
Less: accumulated amortization		$ (5,155)	(4,711)
Total		11,892	12,336
Core Deposits [Member]
Finite-lived Intangible Assets [Roll Forward]
Balance, beginning of period	14,550
Acquisition of PFG	1,370
Balance, gross core deposit intangible	15,920
Finite Lived Intangible Assets Accumulated Amortization [Abstract]
Gross Carrying Amount	15,920		15,920
Less: accumulated amortization		(4,935)	(4,540)
Total		10,985	11,380
Customer Relationships [Member]
Finite-lived Intangible Assets [Roll Forward]
Acquisition of PFG	1,064
Balance, gross core deposit intangible	1,064
Finite Lived Intangible Assets Accumulated Amortization [Abstract]
Gross Carrying Amount	1,064		1,064
Less: accumulated amortization		(206)	(161)
Total		858	903
Trade Names [Member]
Finite-lived Intangible Assets [Roll Forward]
Acquisition of PFG	63
Balance, gross core deposit intangible	63
Finite Lived Intangible Assets Accumulated Amortization [Abstract]
Gross Carrying Amount	$ 63		63
Less: accumulated amortization		(14)	(10)
Total		$ 49	$ 53