ACCRUED LIABILITIES (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued compensation	$ 62,721	$ 37,932
Accrued insurance	43,390	40,387
Accrued taxes	27,363	17,847
Accrued interest	13,829	9,096
Accrued professional services liabilities	6,948	3,703
Accrued liabilities - other	43,078	22,778
Total accrued liabilities	$ 197,329	$ 131,743