Accounts Payable and Accrued Expenses - Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables And Accruals [Abstract]
Accounts payable	$ 6,600	$ 6,000
Accrued payroll and compensated absences	6,400	6,700
Accrued bonuses	1,500	1,000
Professional fees	200	400
Deferred revenue	3,100	4,600
Accrued national representation fees	1,100	1,200
Income taxes payable	300	300
Amounts due under joint sales agreements	2,800	2,900
Accrued property taxes	1,200	1,000
Accrued capital expenditures	800	1,000
Accrued media costs – digital	900	1,300
Other	4,800	5,800
Accounts Payable and Accrued Expenses	$ 29,669	$ 32,195