Leases (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) agreement item $ / shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
Remaining lease term	13 years
Option to renew - lessee	true
Number of sublease agreements	4
Number of renewal options reasonably certain to be exercised | item	0
Number of sublease agreements - contingent upon renewal	2
Number of sublease agreements - exercised	2
Impairment charge - leased assets | $	$ 7,902	$ 0	$ 0
Reduction of EPS | $ / shares	$ 0.20
Master Lease
Lessee, Lease, Description [Line Items]
Number Of Renewal Terms | item	2
Percentage Of Increase In Operating Lease Rent	3.00%
Renewal of lease period	10 years