Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	3. Summary of Significant Accounting Policies For a detailed discussion about the Company’s significant accounting policies, see Note 3, Summary of Significant Accounting Policies, in our consolidated financial statements included in Part II, Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2017. Other than the following, during the six months ended June 30, 2018, there were no significant changes made to the Company’s significant accounting policies. Equity Investments: Effective January 1, 2018, in accordance with the new guidance on recognition and measurement of equity investments, the Company carries its marketable equity securities at fair value and recognizes any changes in fair value in “Other income (loss)” in the Company’s unaudited condensed consolidated statements of operations. Further, the Company has elected to use a measurement alternative for its equity investments without a readily determinable fair value, pursuant to which these investments are initially recognized at cost and remeasured through earnings when there is an observable transaction involving the same or similar investment of the same issuer, or due to an impairment. See Note 9—“Marketable Securities” and Note 18—“Investments” for additional information. Unrealized gains (losses) related to marketable securities and investments carried under the measurement alternative was ($2.4) million and $26.3 million for the three and six months ended June 30, 2018, which was included as part of “Other income (loss)” in the Company’s unaudited condensed consolidated statements of operations. Revenue Recognition: The accounting policy changes are attributable to the adoption of ASU No. 2014-09, Revenue from Contracts with Customers, and related amendments on January 1, 2018. These revenue recognition policy updates are applied prospectively in the Company’s unaudited condensed consolidated financial statements from January 1, 2018 onward. Financial information for the historical comparable periods was not revised and continues to be reported under the accounting standards in effect during those historical periods. Real Estate Management and Other Services: For certain revenues based, in part, on future contingent events (e.g., tenant move-in or payment of first month’s rent), the Company’s performance obligation is typically satisfied at lease signing and, therefore, the portion of the commission that is contingent on a future event is recognized as revenue, if deemed not subject to significant reversal. Further, the Company incurs expenses on behalf of customers for certain management services subject to reimbursement. The Company concluded that it controls the services provided by a third party on behalf of customers and, therefore, acts as a principal under those contracts. As a result, for these service contracts the Company presents expenses incurred on behalf of customers along with corresponding reimbursement revenue on a gross basis in the Company’s unaudited consolidated condensed statements of operations. Refer to Note 30—“Revenue from Contracts with Customers” for additional information. Restricted Cash: Restricted cash represents cash set aside for amounts pledged for the benefit of Fannie Mae in excess of the required cash to secure the Company’s financial guarantee liability.

3. Summary of Significant Accounting Policies

For a detailed discussion about the Company’s significant accounting policies, see Note 3, Summary of Significant Accounting Policies, in our consolidated financial statements included in Part II, Item 8 of our Annual Report on Form 10-K for the year ended December 31, 2017. Other than the following, during the six months ended June 30, 2018, there were no significant changes made to the Company’s significant accounting policies.

Equity Investments:

Effective January 1, 2018, in accordance with the new guidance on recognition and measurement of equity investments, the Company carries its marketable equity securities at fair value and recognizes any changes in fair value in “Other income (loss)” in the Company’s unaudited condensed consolidated statements of operations. Further, the Company has elected to use a measurement alternative for its equity investments without a readily determinable fair value, pursuant to which these investments are initially recognized at cost and remeasured through earnings when there is an observable transaction involving the same or similar investment of the same issuer, or due to an impairment. See Note 9—“Marketable Securities” and Note 18—“Investments” for additional information. Unrealized gains (losses) related to marketable securities and investments carried under the measurement alternative was ($2.4) million and $26.3 million for the three and six months ended June 30, 2018, which was included as part of “Other income (loss)” in the Company’s unaudited condensed consolidated statements of operations.

Revenue Recognition:

The accounting policy changes are attributable to the adoption of ASU No. 2014-09, Revenue from Contracts with Customers, and related amendments on January 1, 2018. These revenue recognition policy updates are applied prospectively in the Company’s unaudited condensed consolidated financial statements from January 1, 2018 onward. Financial information for the historical comparable periods was not revised and continues to be reported under the accounting standards in effect during those historical periods.

Real Estate Management and Other Services:

For certain revenues based, in part, on future contingent events (e.g., tenant move-in or payment of first month’s rent), the Company’s performance obligation is typically satisfied at lease signing and, therefore, the portion of the commission that is contingent on a future event is recognized as revenue, if deemed not subject to significant reversal.

Further, the Company incurs expenses on behalf of customers for certain management services subject to reimbursement. The Company concluded that it controls the services provided by a third party on behalf of customers and, therefore, acts as a principal under those contracts. As a result, for these service contracts the Company presents expenses incurred on behalf of customers along with corresponding reimbursement revenue on a gross basis in the Company’s unaudited consolidated condensed statements of operations.

Refer to Note 30—“Revenue from Contracts with Customers” for additional information.

Restricted Cash:

Restricted cash represents cash set aside for amounts pledged for the benefit of Fannie Mae in excess of the required cash to secure the Company’s financial guarantee liability.