RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS Narrative (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Understatement of Depletion Expense [Member]	Mar. 31, 2014 Understatement of Depletion Expense [Member]
Cost of sales	$ 123,096	$ 127,861	$ 238,995	$ 204,520	$ 2,000	$ 2,000