Revolving Credit Facilities (Details) (USD $)
0 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Jul. 17, 2013
Line of credit
Mar. 31, 2014
Line of credit
Property
credit_advance
Jul. 17, 2013
Line of credit
Minimum
Jul. 17, 2013
Line of credit
Maximum
Jul. 17, 2013
Line of credit
Base Rate
Minimum
Jul. 17, 2013
Line of credit
Base Rate
Maximum
Jul. 17, 2013
Line of credit
LIBOR
Minimum
Jul. 17, 2013
Line of credit
LIBOR
Maximum
Mar. 31, 2014
Revolving Credit Facility
Jul. 15, 2013
Revolving Credit Facility
Mar. 31, 2014
Revolving Credit Facility
Special Purpose Entity
Property
credit_advance
Mar. 31, 2014
Revolving Credit Facility
Deferred Charges And Other Assets
Mar. 31, 2014
Revolving Credit Facility
Prime Rate
Special Purpose Entity
Mar. 31, 2014
Revolving Credit Facility
Floor Rate
Special Purpose Entity
Line of Credit Facility [Line Items]                                
Line of credit facility maximum borrowing capacity     $ 400,000,000                 $ 100,000,000.0        
Extension term     12 months                          
Basis spread on variable rate             1.00% 2.00% 2.00% 3.00%         0.50% 4.00%
Commitment fee on unused capacity         0.25% 0.35%                    
Commitment fee       300,000                        
Deferred Costs                     4,500,000     3,500,000    
Weighted Average Effective Interest Rates                     8.09%          
Interest rate excluding noncash amortization of deferred financing costs and non-utilization fee                     2.68%          
Amount outstanding 135,606,000 35,120,000   120,000,000                 15,600,000      
Number of separate advances       3                 3      
Number of properties securing borrowings       231                 3      
Maximum borrowing capacity increase                         $ 40,000,000      
Term                         24 months      
Weighted average interest rate                         4.26%