Long-Term Obligations - Debt Covenants - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Senior Secured Credit and Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Leverage ratio	575.00%
Interest coverage ratio	185.00%
Senior Secured Notes [Member]
Debt Instrument [Line Items]
Leverage ratio	445.00%	468.00%
Line of Credit [Member]
Debt Instrument [Line Items]
Leverage ratio	445.00%	468.00%