ACCRUED EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ACCRUED EXPENSES
Accrued sales and property taxes	$ 10,359	$ 8,893
Accrued salaries and benefits	7,178	5,562
Accrued interest	1,721	1,031
Other accrued expenses	7,896	3,499
Total	$ 27,154	$ 18,985