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Debt Debt (Repayments of Debt) (Details)
$ in Thousands
Dec. 31, 2015
USD ($)
Debt Disclosure [Abstract]  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months $ 2,268
Long-term Debt, Maturities, Repayments of Principal in Year Two 302,573
Long-term Debt, Maturities, Repayments of Principal in Year Three 2,681
Long-term Debt, Maturities, Repayments of Principal in Year Four 402,792
Long-term Debt, Maturities, Repayments of Principal in Year Five 2,909
Long-term Debt, Maturities, Repayments of Principal after Year Five $ 1,603,428