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Summary of Long-Term Debt (Parenthetical) (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Debt Instrument [Line Items] |  |
Obligations under capitalized leases | $ 24,913 |
Term Loan A |  |
Debt Instrument [Line Items] |  |
Unamortized discount | $ 1,593 | $ 2,035
3.750% Senior Secured Notes due 2019 |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2019 |
Unamortized discount | $ 155 | 198
Senior notes, interest rate | 3.75% |
4.750% Senior Secured Notes due 2022 |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2022 |
Unamortized discount | $ 177 | 204
Senior notes, interest rate | 4.75% |
7.125% Senior Secured Notes due 2016 |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2016 |
Senior notes, interest rate | 7.125% |
Unamortized net premium | $ 4 | 7
Notes Payable And Mortgages Payable |  |
Debt Instrument [Line Items] |  |
Obligations under capitalized leases | $ 24,900 | $ 21,600
Weighted average interest | 6.80% | 6.40%
Term Loans With Varying Maturities |  |
Debt Instrument [Line Items] |  |
Debt instruments, maturity date | 2027 |
Revenue Bonds |  |
Debt Instrument [Line Items] |  |
Interest at floating rates |  | 0.05%

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