WARRANTS	3 Months Ended
Mar. 31, 2018
Other Liabilities [Abstract]
WARRANTS	WARRANTS In 2010 and 2011, the Company entered into warrant agreements with various parties to purchase shares of HHC common stock. The Sponsor Warrants and Management Warrants were exercised and settled in 2017. Prior to their exercise, the fair values for the Sponsor Warrants and Management Warrants were recorded as liabilities in the Company's Consolidated Balance Sheets because the holders of these warrants could require the Company to settle such warrants in cash upon a change of control. The fair values prior to their settlement in 2017 were estimated using an option pricing model and Level 3 inputs due to the unavailability of comparable market data, as further discussed in Note 8 – Fair Value in the Company's Condensed Consolidated Financial Statements. Decreases and increases in the fair value of the Sponsor and Management Warrants prior to their settlements were recognized as warrant liability gains or losses in the Condensed Consolidated Statements of Operations. On October 7, 2016, the Company entered into a warrant agreement with its Chief Financial Officer, David R. O’Reilly, prior to his appointment to the position. Upon exercise of his warrant, Mr. O’Reilly may acquire 50,125 shares of common stock at an exercise price of $112.08 per share. Mr. O’Reilly’s warrant was issued at fair value in exchange for a $1.0 million payment in cash from Mr. O’Reilly. The O’Reilly Warrant becomes exercisable on April 6, 2022, subject to earlier exercise upon certain change in control, separation and termination provisions. On June 16, 2017 and October 4, 2017, the Company also entered into new warrant agreements with its Chief Executive Officer, David R. Weinreb and President, Grant Herlitz to acquire 1,965,409 shares and 87,951 shares of common stock for the purchase price of $50.0 million and $2.0 million, respectively. Mr. Weinreb’s new warrant becomes exercisable on June 15, 2022, at an exercise price of $124.64 per share, and Mr. Herlitz’s new warrant becomes exercisable on October 3, 2022, at an exercise price of $117.01 per share, subject to earlier exercise upon certain change in control, separation and termination provisions. The purchase prices paid by the respective executives for the O’Reilly Warrant and Mr. Weinreb’s and Mr. Herlitz’s new warrants, which qualify as equity instruments, are included within additional paid-in capital in the Condensed Consolidated Balance Sheets at March 31, 2018 and December 31, 2017.

WARRANTS

3 Months Ended

Mar. 31, 2018

In 2010 and 2011, the Company entered into warrant agreements with various parties to purchase shares of HHC common stock. The Sponsor Warrants and Management Warrants were exercised and settled in 2017. Prior to their exercise, the fair values for the Sponsor Warrants and Management Warrants were recorded as liabilities in the Company's Consolidated Balance Sheets because the holders of these warrants could require the Company to settle such warrants in cash upon a change of control. The fair values prior to their settlement in 2017 were estimated using an option pricing model and Level 3 inputs due to the unavailability of comparable market data, as further discussed in Note 8 – Fair Value in the Company's Condensed Consolidated Financial Statements. Decreases and increases in the fair value of the Sponsor and Management Warrants prior to their settlements were recognized as warrant liability gains or losses in the Condensed Consolidated Statements of Operations.

On October 7, 2016, the Company entered into a warrant agreement with its Chief Financial Officer, David R. O’Reilly, prior to his appointment to the position. Upon exercise of his warrant, Mr. O’Reilly may acquire 50,125 shares of common stock at an exercise price of $112.08 per share. Mr. O’Reilly’s warrant was issued at fair value in exchange for a $1.0 million payment in cash from Mr. O’Reilly. The O’Reilly Warrant becomes exercisable on April 6, 2022, subject to earlier exercise upon certain change in control, separation and termination provisions. On June 16, 2017 and October 4, 2017, the Company also entered into new warrant agreements with its Chief Executive Officer, David R. Weinreb and President, Grant Herlitz to acquire 1,965,409 shares and 87,951 shares of common stock for the purchase price of $50.0 million and $2.0 million, respectively. Mr. Weinreb’s new warrant becomes exercisable on June 15, 2022, at an exercise price of $124.64 per share, and Mr. Herlitz’s new warrant becomes exercisable on October 3, 2022, at an exercise price of $117.01 per share, subject to earlier exercise upon certain change in control, separation and termination provisions. The purchase prices paid by the respective executives for the O’Reilly Warrant and Mr. Weinreb’s and Mr. Herlitz’s new warrants, which qualify as equity instruments, are included within additional paid-in capital in the Condensed Consolidated Balance Sheets at March 31, 2018 and December 31, 2017.