Commitments and Contingencies - Future Minimum Rental Payments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
2015	$ 250,000		$ 250,000
2016	998,000		998,000
2017	998,000		998,000
2018	998,000		998,000
2019	998,000		998,000
2020 through 2034	8,756,000		8,756,000
Total	12,998,000		12,998,000
Other Expenses [Abstract]
Operating ground lease expense	$ 224,000	$ 114,000	$ 536,000	$ 289,000