Debt Financing (Aggregate Annual Principal Payments On Debt Associated With Assets Held For Use And Held For Sale) (Details) $ in Thousands	Jun. 30, 2015 USD ($)
Maturities of Long-term Debt [Line Items]
Remainder of 2015	$ 39,076
2016	2,144
2017	37,700
2018	0
2019	0
Thereafter	0
Long-term debt, Total	78,920
Held For Sale [Member]
Maturities of Long-term Debt [Line Items]
Remainder of 2015	27,999
2016	0
2017	0
2018	0
2019	0
Thereafter	0
Long-term debt, Total	27,999
Held For Use [Member]
Maturities of Long-term Debt [Line Items]
Remainder of 2015	11,077
2016	2,144
2017	37,700
2018	0
2019	0
Thereafter	0
Long-term debt, Total	$ 50,921