Leases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee Lease Description [Line Items]
Operating leases, options to extend	some of which include options to extend the leases for up to an additional ten years.
Operating leases, existence of option to extend	true
Operating sublease, option to extend	certain subleases have renewal terms that can extend the lease for up to an additional two years.
Operating sublease, existence of option to extend	true
Total lease expenses	$ 29,437	$ 28,190	$ 19,000
Maximum
Lessee Lease Description [Line Items]
Operating leases, remaining lease term	10 years
Operating leases, option to extend leases term	10 years
Operating subleases, remaining sublease term	3 years
Operating subleases, option to extend sublease term	2 years