Other Balance Sheet Information - Other Current Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accrued Liabilities, Current [Abstract]
Accrued payroll, taxes and employee benefits	$ 34,956	$ 31,708
Accrued operating expenditures	36,573	42,137
Income, sales, use and other taxes	37,064	62,709
Self-insurance reserves	32,129	35,742
Accrued interest	15,285	15,301
Insurance premium financing	8,049	8,021
Other	5,889	5,012
Total	$ 169,945	$ 200,630