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LONG-TERM DEBT LIABILITIES - Senior Unsecured Debt (Details) - USD ($)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2015
Debt Instrument [Line Items]    
Redemption of the principal amount   105.25%
Debt Instrument, Interest Rate, Stated Percentage   10.50%
Senior Unsecured Debt    
Debt Instrument [Line Items]    
Senior Notes $ 220,000,000  
Net Proceeds 212,700,000  
Debt Instrument Original Issue Discount 2,900,000  
Minimum denominations   $ 2,000
Deferred Finance Costs, Current, Net $ 6,100,000