Income Taxes - Carrying amounts of assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred tax liabilities
Accelerated depreciation	$ (5)	$ (3)
Prepaid expenses	(1,690)	(1,676)
Intangible assets	(2,865)	(3,704)
Operating lease assets	(67,400)	(71,221)
Lease incentives	(63)	(5,226)
Total deferred tax liabilities	(72,023)	(81,830)
Deferred tax assets
Investment impairment	22,169	21,601
Inventory related	5,494	5,029
Gift cards	1,788	1,385
Deferred revenues	6,996	6,859
Accrual for employee benefits and severance	2,485	1,555
Stock option expense	469	(10)
Investment in partnership ("Outside Basis Deferred Tax Asset")	241,805	203,663
Tax Receivable Agreement liability	36,486	28,715
Net operating loss carryforward	124,117	114,617
Intangible assets	1,456	2,086
Goodwill	1,433	2,396
Accelerated depreciation	1,283	1,002
Operating lease liabilities	79,639	82,785
Other reserves	8,057	6,309
Gross deferred tax assets	533,677	477,992
Valuation allowance	(295,946)	(266,452)
Net deferred tax assets	$ 165,708	$ 129,710