Acquisitions - Purchase Consideration Allocation (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Dec. 16, 2019	May 30, 2019
Business Acquisition [Line Items]
Goodwill	$ 227,821	$ 227,821
New Jersey Acquisition
Business Acquisition [Line Items]
Fixed assets			$ 3,044
Other assets			314
Goodwill			21,069
Liabilities assumed, including deferred revenues			(443)
Net assets acquired			36,002
Maine Acquisition
Business Acquisition [Line Items]
Fixed assets				$ 999
Unfavorable leases, net				(140)
Other assets				78
Goodwill				7,239
Liabilities assumed, including deferred revenues				(145)
Net assets acquired				14,801
Reacquired franchise rights | New Jersey Acquisition
Business Acquisition [Line Items]
Intangible assets			9,480
Reacquired franchise rights | Maine Acquisition
Business Acquisition [Line Items]
Intangible assets				6,740
Customer relationships | New Jersey Acquisition
Business Acquisition [Line Items]
Intangible assets			940
Customer relationships | Maine Acquisition
Business Acquisition [Line Items]
Intangible assets				$ 30
Favorable leases, net | New Jersey Acquisition
Business Acquisition [Line Items]
Intangible assets			1,508
Reacquired area development rights | New Jersey Acquisition
Business Acquisition [Line Items]
Intangible assets			$ 90