Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2015 USD ($) restricted_cash_account	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Restricted Cash and Cash Equivalents Items [Line Items]
Number of restricted cash accounts | restricted_cash_account		4
Uninsured cash amounts		$ 1,100,000
Allowance for doubtful accounts		171,000	$ 161,000
Development expenses	$ 16,000,000	32,514,000	12,207,000	$ 18,009,000
Advertising expense		1,000,000	977,000	$ 885,000
Total unrecognized compensation		$ 3,100,000
Vesting period for unrecognized compensation cost to be recognized (in years)		2 years 9 months
New York State Racing, Pari-Mutual Wagering And Breeding Law [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents		$ 35,000	49,000
VGM New York Governing Law [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents		629,000	405,000
Minimum reserve balance		400,000	450,000
Monticello Harness Horsemens Association [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and cash equivalents		$ 278,000	$ 806,000