Equity, Fair Value Disclosure, In Excess

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Share Based Compensation, Annual Retainer Payable

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Share Based Compensation, Annual Retainer Payable, Cash Percentage

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Share Based Compensation, Annual Retainer Payable, Restricted Stock Units Percentage

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Share-Based Compensation Arrangement By Share-Based Payment Award, Absolute Shareholder Return, Percent

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Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Shares Authorized, Value

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Share-Based Compensation Arrangement By Share-Based Payment Award, Relative Shareholder Return Excess, Rate

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Share-based Compensation Arrangement by Share-based Payment Award, Percent of Distributions

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Amount of increase to additional paid-in capital (APIC) for recognition of cost for award under share-based payment arrangement, classified as other.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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- Definition

Fair value of the entity's equity.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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Number of shares issued under share-based payment arrangement.

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Price of a single share of a number of saleable stocks of a company.

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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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Equity-Based Compensation - Narrative (Details)		3 Months Ended		6 Months Ended		12 Months Ended
Equity-Based Compensation - Narrative (Details)	Jul. 19, 2018 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 USD ($) shares	Dec. 31, 2019 shares	Feb. 28, 2019 USD ($)	Jan. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation		$ 2,513,000	$ 2,429,000	$ 5,001,000	$ 4,538,000
Distributions paid				$ (234,000)	$ (270,000)
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in lieu of cash (in shares) \| shares				0	0
Incentive Restricted Share Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual retainer payable, cash		50.00%		50.00%
Annual retainer payable, restricted stock units		50.00%		50.00%
Incentive Restricted Share Plan \| Independent Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual retainer payable		$ 100,000		$ 100,000
Incentive Restricted Share Plan \| Non-Executive Chair
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual retainer payable		105,000		105,000
Incentive Restricted Share Plan \| Directors, Servicing on Committees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual retainer payable		$ 30,000		$ 30,000
2015 OPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distribution percent entitled to by LTIP holders		10.00%		10.00%
2018 Multi Year Outperformance Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period				2 years 9 months 18 days
Maximum award value	$ 50,000,000.0
Share price (in dollars per share) \| $ / shares	$ 19.57
2018 Multi Year Outperformance Plan \| Minimum \| Tier One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute TSR	24.00%
Relative TSR excess	(0.06)
2018 Multi Year Outperformance Plan \| Minimum \| Tier Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute TSR	36.00%
Relative TSR excess	0.00
2018 Multi Year Outperformance Plan \| Maximum \| Tier One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute TSR	30.00%
Relative TSR excess	0.00
2018 Multi Year Outperformance Plan \| Maximum \| Tier Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute TSR	30.00%
Relative TSR excess	0.06
Stock Options \| Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares) \| shares		500,000		500,000
Shares issued during the period (in shares) \| shares				0		0
Restricted Stock Units (RSUs) \| Incentive Restricted Share Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of maximum common stock available for issuance				10.00%
Restricted Stock Units (RSUs) \| Incentive Restricted Share Plan \| Directors, Servicing on Committees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs award vesting period				3 years
Restricted Stock Units (RSUs) \| Incentive Restricted Share Plan \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs award vesting period				3 years
Restricted Stock \| Incentive Restricted Share Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 200,000	100,000	$ 300,000	$ 200,000
Restricted Stock \| Restricted Share Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		600,000		$ 600,000
Weighted average period of recognition				2 years 2 months 12 days
LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Distributions paid				$ (200,000)	(300,000)
LTIP Units \| 2018 Multi Year Outperformance Plan \| Advisor
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued during the period (in shares) \| shares	2,554,930
Share-Based Payment Arrangement, Nonemployee \| 2015 OPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period				2 years 9 months 18 days
Share-Based Payment Arrangement, Nonemployee \| LTIP Units \| 2015 OPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity fair value									$ 18,800,000
Share-Based Payment Arrangement, Nonemployee \| LTIP Units \| 2018 Multi Year Outperformance Plan Amendment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense			2,400,000		4,400,000
Equity fair value							$ 29,900,000	$ 23,300,000
Fair value in excess		6,600,000		$ 6,600,000
Non-controlling interest
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation		2,358,000	$ 2,358,000	4,717,000	$ 4,351,000
Non-controlling interest \| Share-Based Payment Arrangement, Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation		$ 2,400,000		$ 4,700,000