Employee Benefits (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) h Plan shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Employee Benefits [Abstract]
Number of retirement savings plan | Plan	2
401(k) Plan [Member]
Defined Contribution Plan [Abstract]
Minimum age of employees to participate in plan	21 years
Minimum requisite service period to participate in retirement plans	1 year
Minimum annual working hours required to participate in plan | h	1,000
Percentage of employee contribution, minimum	1.00%
Percentage of employee contribution, maximum	20.00%
Employer matching contribution	50.00%
Maximum contribution on employees gross pay	8.00%
Contribution by employer under 401(K) plan | $	$ 1.2	$ 1.1	$ 1.1
Number of allocated shares under 401 (K) plan (in shares) | shares	479,489	424,591	416,360
Employee Stock Ownership Plan ("ESOP") [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Maximum annual contribution percentage under ESOP	4.00%
Contributions to ESOP by employer | $	$ 1.8	$ 1.7	$ 1.6
Number of allocated shares under ESOP (in shares) | shares	778,269	738,212	726,327