Summary of Significant Accounting Policies - Accounting Standard Update (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets, net	$ 61,026		$ 56,809
Notes receivable, net	35,844		37,558
Annual Membership Subscription
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets, net	1,857		2,394
Annual Membership Subscription | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets, net		$ (1,361)
Annual Membership Subscription | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other assets, net		1,033
Membership
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Notes receivable, net	$ 25,427		$ 25,236
Membership | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Notes receivable, net		(2,514)
Membership | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Notes receivable, net		$ 22,722