Real Estate - Commitments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013 properties
Commitments and Contingencies Disclosure [Abstract]
Real estate investment, number of properties	48
Real estate held-for-sale, number of properties	2
Real estate, number of properties	50
Real estate investment, funding commitments	$ 139,165	[1]
Real estate held-for-sale, funding commitments	1,656	[1]
Real estate, funding commitments	140,821	[1]
Real estate investment, amount funded	105,026
Real estate held-for-sale, amount funded	1,540
Real estate, amount funded	106,566
Real estate investment, remaining commitment	34,139
Real estate held-for-sale, remaining commitment	116
Real estate, remaining commitment	$ 34,255

[1] Includes land, construction costs and tenant improvements.