Fair Value Measurements and Fair Value of Financial Instruments (Details) - Schedule of fair value on recurring item basis - Recurring [Member] - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Fair value	$ 431,833	$ 415,886
Municipal Securities [Member]
Fair value	$ 8,980	$ 9,114
Valuation Techniques	Discounted cash flows	Discounted cash flows
Unobservable Input	Discount rate	Discount rate
Rate	2.90%	2.90%