Income Taxes (Details) (Taxable REIT Subsidiary, USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Taxable REIT Subsidiary
   
Deferred income tax (expense) benefit    
Federal $ 45 $ 53
State 10 11
Total income tax expense $ 55 $ 64
Effective tax rate (as a percent) 37.80% 38.10%