Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012
Income Taxes
Current income tax expense recognized	$ 907	$ 1,637
Federal taxes included in current tax expense	547	897
Foreign taxes included in current tax expense	31	62
Certain state taxes that are payable without regard to entity's REIT status and TRS tax loss carry forwards, included in current tax expense	329	678
Deferred tax benefit primarily related to the restructuring of certain of our TRSs	$ 6,857	$ 7,068	$ 419