Concentration of Revenue (Details) - Tenants [Member] - United States Government [Member] |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Rental revenue [Member] | |||
| Concentration Risk | |||
| Percentage of revenue | 20.00% | 18.00% | 18.00% |
| Construction contract revenue [Member] | |||
| Concentration Risk | |||
| Percentage of revenue | 90.00% | 90.00% | 90.00% |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|