ACCRUED LIABILITIES - Schedule of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Accrued compensation	$ 64,586	$ 62,721
Accrued insurance	53,637	43,390
Accrued taxes	18,289	27,363
Accrued interest	14,123	13,829
Accrued professional services liabilities	10,109	6,948
Accrued liabilities - other	67,782	43,078
Total accrued liabilities	$ 228,526	$ 197,329