Securities Carried at Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
REIT Common shares [Member]
Securities carried at fair value
Cost	$ 8,920	$ 15,876
Fair Value	12,220	19,694
Loan securities [Member]
Securities carried at fair value
Cost	161	161
Fair Value	11	11
Securities Carried at Fair Value Total [Member]
Securities carried at fair value
Cost	9,081	16,037
Fair Value	$ 12,231	$ 19,705