LONG-TERM DEBT - Summary of Components of Long-Term Debt and Capital Leases by Debt Instruments, Interest Rates (Detail)	9 Months Ended
	Sep. 30, 2016
Senior Secured Asset Based Revolving Credit Facility, Due 2020
Debt Instrument [Line Items]
Debt instrument variable rate basis	2.25%
Revenue Bonds Series 2014 Due December 2044
Debt Instrument [Line Items]
Debt instrument stated percentage	3.75%
Revenue Bonds Series 2014R-2, Due December 2044
Debt Instrument [Line Items]
Debt instrument stated percentage	3.125%
Revenue Bonds Series 2005R-2, Due January 2025
Debt Instrument [Line Items]
Debt instrument stated percentage	6.25%
Revenue Bonds Series 2015 Due August 2035
Debt Instrument [Line Items]
Debt instrument stated percentage	5.125%
Long-Term Revenue Bonds Series 2013 Due April 2036
Debt Instrument [Line Items]
Debt instrument stated percentage	4.75%
Revenue Bonds Series 2013 Due April 2029
Debt Instrument [Line Items]
Debt instrument stated percentage	4.00%
Capital Lease Obligations
Debt Instrument [Line Items]
Debt instrument stated percentage	7.70%
Notes Payable
Debt Instrument [Line Items]
Debt instrument stated percentage	7.00%
Senior Subordinated Notes Due 2019 Notes
Debt Instrument [Line Items]
Debt instrument stated percentage	7.75%