Net investments in Properties (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	$ 95,209	$ 86,823
Non-recourse debt
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	(9,279)	0
Real Estate
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	61,274	62,466
Above-market rent
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	21,394	13,872
In-place lease
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	14,041	12,293
Below market rent
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	$ (1,500)	$ (1,808)