Debt Debt (Schedule of Maturities of Long-term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Maturities of Long-term Debt [Abstract]
Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months	$ 762
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	787
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	814
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	842
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	467,871
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	545,805
Long-term Debt, Gross	1,016,881
Debt Instrument, Unamortized Discount	(7,737)
Debt, Long-term and Short-term, Combined Amount	$ 1,009,144	$ 862,726