Long-Term Debt Annual Maturities (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Long Term Debt Annual Maturities [Abstract]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 10,600
Long-term Debt, Maturities, Repayments of Principal in Year Two	45,600
Long-term Debt, Maturities, Repayments of Principal in Year Three	13,600
Long-term Debt, Maturities, Repayments of Principal in Year Four	25,100
Long-term Debt, Maturities, Repayments of Principal in Year Five	20,600
Long-term Debt, Maturities, Repayments of Principal after Year Five	211,700
Total Future Repayments	$ 327,226