Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
DEFERRED TAX ASSETS:
Accounting reserves and accruals	$ 15,931	$ 14,594
Defined benefit plan	4,194	4,620
Deferred management rights proceeds	43,420	44,189
Federal and State net operating loss carryforwards	45,794	59,382
Tax credits and other carryforwards	499	870
Other assets	4,605	4,427
Total deferred tax assets	114,443	128,082
Valuation allowance	(12,387)	(14,210)
Total deferred tax assets, net of valuation allowance	102,056	113,872
DEFERRED TAX LIABILITIES:
Property and equipment, net	61,970	57,931
Investment in joint ventures	12,639	14,135
Goodwill and other intangibles	717	478
Other liabilities	771	771
Total deferred tax liabilities	76,097	73,315
Net deferred tax assets	$ 25,959	$ 40,557