| **Debt - Additional Information (Details) (USD $)**                                                                            |              |     | 12 Months Ended |              |              |            |              | 1 Months Ended |           |               |
|--------------------------------------------------------------------------------------------------------------------------------|--------------|-----|-----------------|--------------|--------------|------------|--------------|----------------|-----------|---------------|
||
| **Debt Instrument [Line Items]**                                                                                               |         |     |            |         |         |       |         |           |      |          |   |   |   |
| Long term debt                                                                                                                 | $ 49,415,000 | [1] | $ 44,217,000    | $ 29,300,000 | $ 26,100,000 |       | $ 11,000,000 |           |      |          |   | $ 16,800,000 | $ 6,400,000 |
| Long-term debt, excluding held-for-sale                                                                                        | 54,806,000   |     | 44,217,000      |         | 26,111,000   | 26,260,000 |         | 16,767,000     | 6,445,000 |          |   |   |   |
| Long term debt, year of balloon payment                                                                                        |         |     |            | 2015         |         |       |         |           |      |          |   |   |   |
| Total community development district debt                                                                                      | 33,700,000   |     | 34,800,000      |         |         |       | 11,000,000   |           |      |          |   |   |   |
| Construction loan                                                                                                              |         |     |            |         |         |       |         |           |      | 41,000,000    |   |   |   |
| Construction loan, term of optional renewal extension                                                                          |         |     |            |         |         |       |         |           |      | 2 years       |   |   |   |
| Principal repayment guarantee                                                                                                  |         |     |            |         |         |       |         |           |      | 33.00%        | 33.00% |   |   |
| Debt instrument, covenant compliance, minimum liquidity amount                                                                 |         |     |            |         |         |       |         |           |      | 25,000,000    |   |   |   |
| Net worth                                                                                                                      |         |     |            |         |         |       |         |           |      | $ 350,000,000 |   |   |   |
|                                                                                                                                |
| [1]Includes debt defeased in connection with the sale of the Company’s office portfolio in the amount of $26.1 million. |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Including the current and noncurrent portions, carrying value as of the balance sheet date of a type of municipal bond typically used to fund a development project. Also called special assessment limited liability bond, special district bond, special purpose bond, special tax bond and community development obligation. Interest owed to lenders is paid by taxes levied on the community benefiting from the particular bond-funded project. For example, if a bond of this sort was issued to pay for sidewalks to be repaved in a certain community, an additional tax would be levied on homeowners in the area benefiting from this project.
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                     |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Construction Loan, Term of Optional Renewal Extension
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                        |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Debt Instrument, Covenant Compliance, Minimum Liquidity Amount
+ References
No definition available.
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| X                                                                                                                                                                                                                                                            |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Long-Term Debt, Including Held-For-Sale
+ References
No definition available.
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| X                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Long Term Debt, Year of Balloon Payment
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Repayment Guarantee For Principal Amount Of Loan
+ References
No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the carrying value of a short-term real estate loan to finance building costs. The funds are disbursed as needed or in accordance with a prearranged plan; generally, a portion of the funds is disbursed at inception and the remainder as construction progresses. The money is repaid on completion of the project, usually from the proceeds of a mortgage loan. The rate is normally higher than the prime rate, and there is usually an origination fee. The effective yield on these loans tends to be high, and the lender has a security interest in the real property. Note that there are separate concepts for the current and noncurrent portions of long-term construction loans.
+ References
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| X                                                                                                                                                           |
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates.
+ References
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