Investments in and Advances to Affiliates

Unconsolidated Affiliates

We have equity interests of up to 50.0% in various joint ventures with unrelated third parties that are accounted for using the equity method of accounting because we have the ability to exercise significant influence over the operating and financial policies of the joint venture investment. The difference between the cost of these investments and the net book value of the underlying net assets was $0.7 million and $(1.2) million at December 31, 2017 and 2016, respectively.

The following table sets forth our ownership in unconsolidated affiliates at December 31, 2017:



Joint Venture	Location	Ownership Interest
Plaza Colonnade, Tenant-in-Common	Kansas City	50.0%
Kessinger/Hunter & Company, LC	Kansas City	26.5%
Highwoods DLF Forum, LLC	Raleigh	25.0%
Highwoods DLF 98/29, LLC	Orlando	22.8%

We receive development, management and leasing fees for services provided to certain of our joint ventures. These fees are recognized in income to the extent of our respective joint venture partner's interest. During the years ended December 31, 2017, 2016 and 2015, we recognized $1.4 million, $0.8 million and $1.4 million, respectively, of development/construction, management and leasing fees from our unconsolidated joint ventures. At both December 31, 2017 and 2016, we had receivables of $0.1 million related to these fees in accounts receivable.

4. Investments in and Advances to Affiliates - Continued

Consolidated Affiliates

The following summarizes our consolidated affiliates:

- Highwoods-Markel Associates, LLC (“Markel”)

We have a 50.0% ownership interest in Markel. We are the manager and leasing agent for Markel's properties, which are located in Richmond in exchange for customary management and leasing fees. We consolidate Markel since we are the managing member and control the major operating and financial policies of the entity. As controlling member, we have an obligation to cause this property-owning entity to distribute proceeds of liquidation to the noncontrolling interest member in these partially owned properties only if the net proceeds received by the entity from the sale of any of Markel's assets warrant a distribution as determined

by the agreement governing the joint venture. We estimate the value of such noncontrolling interest distributions would have been $26.1 million had the entity been liquidated at December 31, 2017. This estimated settlement value is based on the fair value of the underlying properties which is based on a number of assumptions that are subject to economic and market uncertainties including, among others, demand for space, competition for customers, changes in market rental rates and costs to operate each property. If the entity's underlying assets are worth less than the underlying liabilities on the date of such liquidation, we would have no obligation to remit any consideration to the noncontrolling interest holder.

- Harborview

We had a 20.0% interest in Harborview, which had been accounted for as a financing obligation since our partner had the right to put its 80.0% equity interest back to us any time prior to September 11, 2015. During 2012, we also provided a three-year $20.8 million interest-only secured loan to Harborview that was scheduled to mature in September 2015.

During the second quarter of 2015, as a result of our partner’s irrevocable exercise of a buy-sell provision in our Harborview joint venture agreement, our partner’s right to put its 80.0% equity interest back to us became no longer exercisable, which resulted in recording the original contribution transaction as a partial sale. As a result, we were required to begin accounting for Harborview using the equity method of accounting. See Note 1.

During the third quarter of 2015, we sold our 20.0% interest in Harborview to our partner for net proceeds of $6.9 million and recorded a $4.2 million gain on disposition of investment in unconsolidated affiliate. The $20.8 million interest-only secured loan previously provided by us to Harborview was paid in full upon consummation of the sale.