RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS Narrative (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014 Understatement of Depletion Expense [Member]	Mar. 31, 2014 Understatement of Depletion Expense [Member]	Sep. 30, 2014 Additional Depletion Expense [Member]
Cost of sales	$ 118,088	$ 129,002	$ 357,083	$ 333,523	$ 2,000	$ 2,000	$ 2,600