Income Taxes - Carrying amounts of assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax liabilities
Accelerated depreciation	$ (4,655)	$ (3,389)
Prepaid expenses	(358)	(232)
Other	(57)	(93)
Total deferred tax liabilities	(5,070)	(3,714)
Deferred tax assets
Investment impairment	30,680	30,767
Gift cards	969	940
Deferred revenues	355	332
Accrual for employee benefits and severance	1,246	884
Stock option expense	55
Investment in partnership	115,057
Tax Receivable Agreement	7,387
AMT credit	1,049	549
Net operating loss carryforward	8,512	9,926
Claims reserves	547	444
Intangible assets	70	54
Goodwill	1,898	2,264
Deferred book gain	1,337	1,472
Other reserves	5,339	4,820
Gross deferred tax assets	174,501	52,452
Valuation allowance	(43,553)	(42,504)
Net deferred tax assets	$ 125,878	$ 6,234