OTHER BALANCE SHEET INFORMATION - Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Other current liabilities:
Accrued payroll, taxes and employee benefits	$ 24,193	$ 34,956
Accrued operating expenditures	41,574	36,573
Income, sales, use and other taxes	28,907	37,064
Self-insurance reserve	33,043	32,129
Accrued interest	15,241	15,285
Insurance premium financing	2,327	8,049
Share-based compensation and other liabilities	5,879	5,889
Total	$ 151,164	$ 169,945