Financing Receivables - Schedule for Delinquent Payments for Both Principal and Interest (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Book Value $ 3,394 $ 0
Amount of Payments Past Due 30-59 Days 35 0
Amount of Payments Past Due 60-89 Days 0 0
Amount of Payments Past Due Greater Than 90 Days 0 0
Amount of Payments Past Due, Total 35 0
Industrial    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Book Value 0 0
Amount of Payments Past Due 30-59 Days 0 0
Amount of Payments Past Due 60-89 Days 0 0
Amount of Payments Past Due Greater Than 90 Days 0 0
Amount of Payments Past Due, Total 0 0
Office    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Book Value 3,394 0
Amount of Payments Past Due 30-59 Days 35 0
Amount of Payments Past Due 60-89 Days 0 0
Amount of Payments Past Due Greater Than 90 Days 0 0
Amount of Payments Past Due, Total 35 0
Medical    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Book Value 0 0
Amount of Payments Past Due 30-59 Days 0 0
Amount of Payments Past Due 60-89 Days 0 0
Amount of Payments Past Due Greater Than 90 Days 0 0
Amount of Payments Past Due, Total 0 0
Other    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Book Value 0 0
Amount of Payments Past Due 30-59 Days 0 0
Amount of Payments Past Due 60-89 Days 0 0
Amount of Payments Past Due Greater Than 90 Days 0 0
Amount of Payments Past Due, Total $ 0 $ 0