Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Long-Term Debt (Parenthetical) (Detail)

v3.8.0.1
Long-Term Debt - Long-Term Debt (Parenthetical) (Detail) - USD ($)
$ in Millions
Sep. 30, 2017
Mar. 10, 2017
Dec. 31, 2016
May 09, 2013
Jul. 02, 2012
7.0% Senior Subordinated Notes Due 2022 [Member]          
Debt Instrument [Line Items]          
Stated interest rate on debt agreement 7.00%   7.00%   7.00%
Discount associated with notes     $ 1.1    
5.0% Senior Subordinated Notes due 2023 [Member]          
Debt Instrument [Line Items]          
Stated interest rate on debt agreement 5.00%   5.00% 5.00%  
6.125% Senior Subordinated Notes due 2027 [Member]          
Debt Instrument [Line Items]          
Stated interest rate on debt agreement 6.125% 6.125% 6.125%    
2016 Revolving Credit Facility [Member]          
Debt Instrument [Line Items]          
Interest rate 2.25%   2.25%    
Mortgage Notes [Member]          
Debt Instrument [Line Items]          
Discount associated with notes     $ 0.2    
Minimum [Member] | Mortgage Notes [Member]          
Debt Instrument [Line Items]          
Mortgage notes to finance companies-fixed rate, percentage 3.51%        
Mortgage notes to finance companies-variable rate, percentage 1.50%        
Maximum [Member] | Mortgage Notes [Member]          
Debt Instrument [Line Items]          
Mortgage notes to finance companies-fixed rate, percentage 7.03%        
Mortgage notes to finance companies-variable rate, percentage 2.90%