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Long-term Debt Activity (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Long-term Debt, Gross $ 330,400,000us-gaap_DebtInstrumentCarryingAmount $ 148,000,000us-gaap_DebtInstrumentCarryingAmount
Current maturities of long-term debt 22,184,000us-gaap_LongTermDebtCurrent 10,431,000us-gaap_LongTermDebtCurrent
Debt Instrument, Unamortized Discount 5,500,000us-gaap_DebtInstrumentUnamortizedDiscount 2,400,000us-gaap_DebtInstrumentUnamortizedDiscount
Long-term debt, less current maturities 302,800,000us-gaap_LongTermDebtNoncurrent 135,232,000us-gaap_LongTermDebtNoncurrent
Senior Loans [Member]    
Debt Instrument [Line Items]    
Long-term Debt, Gross 298,900,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_SeniorLoansMember
132,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_SeniorLoansMember
Long-term Debt, Weighted Average Interest Rate 4.10%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_DebtInstrumentAxis
= us-gaap_SeniorLoansMember
 
Junior Loans [Member]    
Debt Instrument [Line Items]    
Long-term Debt, Gross $ 31,500,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_JuniorLoansMember
$ 16,000,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_JuniorLoansMember
Long-term Debt, Weighted Average Interest Rate 6.89%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_DebtInstrumentAxis
= us-gaap_JuniorLoansMember