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Commitments and Contingencies - Summary of Company's Minimum Aggregate Rental Commitments Under all Non-cancelable Operating Leases (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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|---|---|
| Leases Future Minimum Payments [Line Items] | |
| 2015 | $ 1,743 |
| 2016 | 1,754 |
| 2017 | 1,830 |
| 2018 | 1,899 |
| 2019 | 1,915 |
| Thereafter | 14,838 |
| Total | 23,979 |
| Ground Leases [Member] | |
| Leases Future Minimum Payments [Line Items] | |
| 2015 | 1,159 |
| 2016 | 1,161 |
| 2017 | 1,225 |
| 2018 | 1,283 |
| 2019 | 1,293 |
| Thereafter | 12,344 |
| Total | 18,465 |
| Office and Equipment Leases [Member] | |
| Leases Future Minimum Payments [Line Items] | |
| 2015 | 584 |
| 2016 | 593 |
| 2017 | 605 |
| 2018 | 616 |
| 2019 | 622 |
| Thereafter | 2,494 |
| Total | $ 5,514 |