Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Commitments and Contingencies Disclosure [Line Items]
Liability for deferred lease expenses	$ 42,378	$ 43,333
Employer matching contribution payments	3,187	$ 3,043
Liability recorded for employer contribution payments	$ 3,522
Other Employees Except Tim Warner
Commitments and Contingencies Disclosure [Line Items]
Employment agreements term extension	1 year
Tim Warner
Commitments and Contingencies Disclosure [Line Items]
Employment agreement termination date	Apr. 01, 2016
Minimum
Commitments and Contingencies Disclosure [Line Items]
Operating and capital leases with terms generally ranging	10 years
Maximum
Commitments and Contingencies Disclosure [Line Items]
Operating and capital leases with terms generally ranging	25 years