Debt Financing (Aggregate Annual Principal Payments On Debt Associated With Assets Held For Use And Held For Sale) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Maturities of Long-term Debt [Line Items]
Remainder of 2014	$ 40,188
2015	26,692
2016	4,817
2017	40,734
2018	5,461
Thereafter	0
Long-term debt, Total	117,892
Held For Sale [Member]
Maturities of Long-term Debt [Line Items]
Remainder of 2014	26,843
2015	0
2016	0
2017	0
2018	0
Thereafter	0
Long-term debt, Total	26,843
Held For Use [Member]
Maturities of Long-term Debt [Line Items]
Remainder of 2014	13,345
2015	26,692
2016	4,817
2017	40,734
2018	5,461
Thereafter	0
Long-term debt, Total	$ 91,049