Debt Debt (Schedule of Maturities of Long-term Debt) (Details) - USD ($) $ in Thousands	Jun. 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	$ 755
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two	781
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three	808
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four	101,835
Long-term Debt, Maturities, Repayments of Principal in Rolling Year Five	250,864
Long-term Debt, Maturities, Repayments of Principal in Rolling after Year Five	546,025
Long-term Debt, Gross	901,068
Debt Instrument, Unamortized Discount	(8,036)
Debt, Long-term and Short-term, Combined Amount	$ 893,032	$ 862,726