Acquisition - Fair value of the assets acquired and liabilities assumed (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 31, 2019	Oct. 02, 2019	Dec. 31, 2019
Less net assets acquired:
Goodwill	$ 78,355		$ 78,355
Acquisition-related costs			5,270
Acquisition
Purchase consideration:
Cash at closing	288,089
Assumption of debt previously owed by FRC	10,000
Deferred payments	53,471
Contingent consideration	12,786
Consideration transferred	364,346
Fair value of previously-held equity interests	122,000
Total	486,346
Less net assets acquired:
Current assets	23,682		23,682
Property and equipment	84,360		84,360
Intangible assets	338,782		338,782
Operating lease assets	223,455		223,455
Other assets	5,842		5,842
Current liabilities	(64,814)		(64,814)
Operating lease liabilities	(202,433)		(202,433)
Other noncurrent liabilities	(883)		(883)
Total net assets acquired	407,991		407,991
Goodwill	78,355		78,355
Goodwill deductible for tax purpose	73,100		$ 73,100
Operating lease assets, weighted-average amortization period			15 years 2 months 12 days
Changes in the fair value of the deferred and contingent consideration and compensation expense			$ 1,000
Acquisition | Minimum
Less net assets acquired:
Property and equipment, useful lives			3 years
Acquisition | Maximum
Less net assets acquired:
Property and equipment, useful lives			30 years
North Italia Acquisition
Purchase consideration:
Fair value of previously-held equity interests		$ 122,000
Less net assets acquired:
Goodwill	$ 29,200		$ 29,200