Fair Value Measurements and Fair Value of Financial Instruments (Details) - Schedule of fair value on recurring item basis - Recurring [Member] - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Fair value	$ 455,223	$ 501,342
Municipal Securities [Member]
Fair value	$ 8,774	$ 8,844
Valuation Techniques	Discounted cash flows	Discounted cash flows
Unobservable Input	Discount rate	Discount rate
Rate	2.90%	2.90%