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Long-Term Obligations Maturity of Principal Payments (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
LOng-Term Obligations Disclosure [Abstract]  
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year $ 0
Long-term Debt, Maturities, Repayments of Principal in Year Two 0
Long-term Debt, Maturities, Repayments of Principal in Year Three 0
Long-term Debt, Maturities, Repayments of Principal in Year Four 75,000
Long-term Debt, Maturities, Repayments of Principal after Year Five 0
Debt, Long-term and Short-term, Combined Amount $ 75,000