Fair Value of Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value of Financial Instruments
Mortgage notes payable	$ 90,727	$ 93,127
5.73% Mortgage notes due in 2015
Fair Value of Financial Instruments
Mortgage notes payable	48,377	49,274
Interest rate (as a percent)	5.73%	5.73%
Unamortized fair value premium included in mortgage notes	409	621
6.21% Mortgage notes due in 2016
Fair Value of Financial Instruments
Mortgage notes payable	24,147	24,441
Interest rate (as a percent)	6.21%	6.21%
7% Mortgage notes due in 2019
Fair Value of Financial Instruments
Mortgage notes payable	9,919	10,247
Interest rate (as a percent)	7.00%	7.00%
Unamortized fair value premium included in mortgage notes	749	878
8.15% Mortgage notes due in 2021
Fair Value of Financial Instruments
Mortgage notes payable	8,284	9,165
Interest rate (as a percent)	8.15%	8.15%
Unamortized fair value premium included in mortgage notes	525	651
Carrying Amount
Fair Value of Financial Instruments
Mortgage notes payable	90,727
Carrying Amount | 5.73% Mortgage notes due in 2015
Fair Value of Financial Instruments
Mortgage notes payable	48,377
Carrying Amount | 6.21% Mortgage notes due in 2016
Fair Value of Financial Instruments
Mortgage notes payable	24,147
Carrying Amount | 7% Mortgage notes due in 2019
Fair Value of Financial Instruments
Mortgage notes payable	9,919
Carrying Amount | 8.15% Mortgage notes due in 2021
Fair Value of Financial Instruments
Mortgage notes payable	8,284
Fair Value
Fair Value of Financial Instruments
Mortgage notes payable	95,385
Fair Value | 5.73% Mortgage notes due in 2015
Fair Value of Financial Instruments
Mortgage notes payable	49,924
Fair Value | 6.21% Mortgage notes due in 2016
Fair Value of Financial Instruments
Mortgage notes payable	26,251
Fair Value | 7% Mortgage notes due in 2019
Fair Value of Financial Instruments
Mortgage notes payable	10,448
Fair Value | 8.15% Mortgage notes due in 2021
Fair Value of Financial Instruments
Mortgage notes payable	$ 8,762