Long-term Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 548,200	$ 148,000
Less current maturities	37,758	10,431
Less unamortized discounts	10,300	2,400
Total	500,147	135,232
Repayments of debt obligations	15,800
Senior Loans [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 492,100	132,000
Long-term Debt, Weighted Average Interest Rate	4.10%
Junior Loans [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 56,100	$ 16,000
Long-term Debt, Weighted Average Interest Rate	6.90%