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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Gross number of share options (or share units) granted during the period.

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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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STOCK BASED COMPENSATION PLANS - Additional Information (Details)													3 Months Ended		9 Months Ended
	Jun. 22, 2017 USD ($) shares	Jun. 19, 2017 USD ($) shares	Mar. 17, 2017	Mar. 03, 2017 USD ($) shares	Feb. 21, 2017 USD ($)	Feb. 18, 2017 USD ($) shares anniversary installment	Jan. 24, 2017 USD ($) shares	Feb. 18, 2016 USD ($) shares	Feb. 10, 2016 USD ($)	Jun. 10, 2015 USD ($) shares	Feb. 18, 2015 USD ($) Vesting_Installment shares	Feb. 11, 2014	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($) shares	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($) shares	Dec. 31, 2016 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of recognition for unrecognized compensation costs															34 months	29 months
Unrecognized compensation cost \| $													$ 7,400,000	$ 10,700,000	$ 7,400,000	$ 10,700,000
Weighted average remaining vesting period															21 months 21 days	20 months 6 days
Days following the end of the participant’s employment			60 days
Stock price, days following the end of the participant’s employment			45 days
Compensation bonus \| $					$ 39,500,000				$ 46,800,000
Bonus payment allocated to equity based compensation \| $					$ 10,200,000				$ 10,300,000
Compensation expense \| $													$ 7,400,000	$ 8,300,000	$ 19,900,000	$ 17,600,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares granted (in shares)															874,621	960,532
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted (in shares)													0	0	0	380,949
2014 Omnibus Incentive Plan \| Senior Management \| Restricted Stock \| Performance-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of installments in which awards are vested \| Vesting_Installment											3
Minimum performance target percentage											8.00%
Performance period											3 years
2014 Omnibus Incentive Plan \| Senior Management \| Restricted Stock \| Time-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of installments in which awards are vested \| Vesting_Installment											3
2014 Omnibus Incentive Plan \| Senior Management \| Stock Options \| Time-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate grant date fair value of stock options granted \| $								$ 1,000,000.0			$ 1,400,000
Number of options granted (in shares)											670,256
Fair value valuation assumptions: risk-free rate								1.50%			1.79%
Fair value valuation assumptions: dividend yield								9.80%			5.30%
Fair value valuation assumptions: expected life								6 years			6 years
Fair value valuation assumptions: volatility rate								48.00%			24.00%
2014 Omnibus Incentive Plan \| Members of Management and Employees \| Restricted Stock \| Performance-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period												3 years
2014 Omnibus Incentive Plan \| Members of Management and Employees \| Restricted Stock \| Time-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage												50.00%
2014 Omnibus Incentive Plan \| Members of Management and Employees \| Restricted Stock \| Time Based Vesting on Eighteen Months Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage												25.00%
2014 Omnibus Incentive Plan \| Members of Management and Employees \| Restricted Stock \| Time Based Vesting on Three Year Anniversary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period												3 years
2014 Omnibus Incentive Plan \| Harris \| Restricted Stock \| Time-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period												3 years
2014 Omnibus Incentive Plan \| Douglas Durst \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period												3 years
2014 Omnibus Incentive Plan \| Board of Directors \| Restricted Stock \| Time-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate grant date fair value of stock options granted \| $								$ 100,000
2016 Compensation Plan \| Senior Management \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of recognition for unrecognized compensation costs						3 years
2016 Compensation Plan \| Executive Officers \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of recognition for unrecognized compensation costs						3 years
2016 Compensation Plan \| Executive Officers \| Restricted Stock \| Performance-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						50.00%
Number of installments in which awards are vested \| installment						3
Number of anniversaries in which awards are vested \| anniversary						3
2016 Compensation Plan \| Executive Officers \| Restricted Stock \| Time-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						50.00%
2016 Compensation Plan \| Non-Management Employees \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of recognition for unrecognized compensation costs						3 years
2016 Compensation Plan \| Non-Management Employees \| Restricted Stock \| Performance-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						50.00%
2016 Compensation Plan \| Non-Management Employees \| Restricted Stock \| Time-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage						50.00%
2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of recognition for unrecognized compensation costs	3 years			3 years
2016 Compensation Plan \| Michael Mazzei \| Upfront Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of recognition for unrecognized compensation costs	3 years
Phantom Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)													279,935		279,935		373,871
Units vested (in shares)													373,871		373,871
Total employee's contribution, net of forfeitures and payouts related to terminations \| $													$ 3,900,000		$ 3,900,000		$ 6,100,000
2014 Deferred Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units outstanding (in shares)													343,933		343,933		273,709
Units unvested (in shares)													221,723		221,723		134,281
Total employee's contribution, net of forfeitures and payouts related to terminations \| $													$ 4,700,000		$ 4,700,000		$ 3,600,000
Class A common stock \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares granted (in shares)													0	0	859,061	793,598
Class A common stock \| 2014 Omnibus Incentive Plan \| Senior Management \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $											$ 12,600,000
Number of restricted shares granted (in shares)								289,326			688,400
Class A common stock \| 2014 Omnibus Incentive Plan \| Senior Management \| Restricted Stock \| Performance-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage											50.00%
Class A common stock \| 2014 Omnibus Incentive Plan \| Senior Management \| Restricted Stock \| Time-based vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage											50.00%
Class A common stock \| 2014 Omnibus Incentive Plan \| Senior Management \| Restricted Stock \| Period 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						3 years					3 years
Class A common stock \| 2014 Omnibus Incentive Plan \| Harris \| Restricted Stock \| Period 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period											2 years
Class A common stock \| 2014 Omnibus Incentive Plan \| Board of Directors \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted shares granted (in shares)								12,636		4,223	7,962
Grant date fair value of awards granted \| $										$ 100,000	$ 100,000
Class A common stock \| 2014 Omnibus Incentive Plan \| Board of Directors \| Restricted Stock \| Period 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period										3 years
Class A common stock \| 2014 Omnibus Incentive Plan \| Executive Officers \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $								$ 9,100,000
Number of restricted shares granted (in shares)								793,598
Class A common stock \| 2016 Compensation Plan \| Board of Directors \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $						$ 200,000
Number of restricted shares granted (in shares)						16,245
Period of recognition for unrecognized compensation costs						1 year
Class A common stock \| 2016 Compensation Plan \| Executive Officers \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $						$ 10,200,000
Number of restricted shares granted (in shares)						736,461
Class A common stock \| 2016 Compensation Plan \| Management Grantees \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $						$ 48,475
Number of restricted shares granted (in shares)						3,500
Cash dividends received \| $						$ 1,000,000.0
Class A common stock \| 2016 Compensation Plan \| Management Grantees \| Restricted Stock With Dividend Equivalent Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $							$ 30,455
Number of restricted shares granted (in shares)							2,191
Class A common stock \| 2016 Compensation Plan \| New Employee \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $						$ 400,000
Number of restricted shares granted (in shares)						28,881
Number of installments in which awards are vested						2
Number of anniversaries in which awards are vested \| installment						2
Class A common stock \| 2016 Compensation Plan \| Non-Management Employees \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $						$ 600,000
Number of restricted shares granted (in shares)						40,000
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $		$ 300,000		$ 100,000
Number of restricted shares granted (in shares)		21,307		5,130
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock \| Year 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares)		1,775
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock \| Period 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares)		1,775
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock \| Period 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares)		1,775
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock \| Period 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares)		1,775
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock \| Period 4
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares)		1,775
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock \| Period 5
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares)		1,775
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock \| Period 6
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares)		1,775
Class A common stock \| 2016 Compensation Plan \| New Member of Board of Directors \| Upfront Restricted Stock \| Period 7
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to vest (in shares)		1,780
Class A common stock \| 2016 Compensation Plan \| Michael Mazzei \| Upfront Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of awards granted \| $	$ 100,000
Number of restricted shares granted (in shares)	5,346