Debt instrument, default interest.

No definition available.

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- Definition

Income recognized from tax credit transactions.

+ References

No definition available.

+ Details

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- Definition

Number of properties collateralized.

+ References

No definition available.

+ Details

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- Definition

Percentage of tax credits on qualifying invested equity loans.

+ References

No definition available.

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- Definition

Redemption of loan expiration period.

+ References

No definition available.

+ Details

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- Definition

Transfer of tax credit transactions to investors exchange amount.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Number of mortgage loans within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Footnote 3
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Footnote 3))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

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- Definition

Amount of outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(c))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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.

+ References

No definition available.

+ Details

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Average fixed interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 1A
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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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-Name Accounting Standards Codification
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- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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-Topic 235
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Debt - Mortgage Payable - Additional Information (Details)		3 Months Ended		12 Months Ended
	Nov. 09, 2017 USD ($)	Mar. 31, 2020 USD ($) property	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) property loan	Dec. 31, 2012 USD ($)
Debt Instrument [Line Items]
Scheduled principal payment		$ 1,500,000
Mortgages
Debt Instrument [Line Items]
Scheduled principal payment				$ 5,900,000
Borrowings, amount				$ 258,900,000
Number of properties collateralized \| property		44		44
Mortgages \| Maturing from May 2019 to January 2021
Debt Instrument [Line Items]
Number of mortgage loans \| loan				3
Borrowings, amount				$ 69,000,000.0
Mortgages \| Maturing from April 2022 though December 2024.
Debt Instrument [Line Items]
Borrowings, amount				$ 71,800,000
Mortgages \| Maturities Ranging from November 2019 through January 2020
Debt Instrument [Line Items]
Number of mortgage loans \| loan				3
Borrowings, amount				$ 135,900,000
Mortgages \| Maturing Ranging from December 2020 though May 2021
Debt Instrument [Line Items]
Borrowings, amount				125,300,000
Mortgages \| Interest Rate Swaps
Debt Instrument [Line Items]
Derivative, notional amount				$ 283,600,000
Derivative weighted average interest rate				1.78%
Fund II \| New Market Tax Credit
Debt Instrument [Line Items]
Percentage of tax credits on qualifying invested equity loans			39.00%
Transfer of tax credit transactions to investors exchange amount					$ 5,200,000
Redemption of loan expiration period		7 years
Fund II \| New Market Tax Credit \| Other Income
Debt Instrument [Line Items]
Income recognized from tax credit transactions		$ 1,400,000	$ 5,000,000.0
Fund II \| City Point Project \| New Market Tax Credit
Debt Instrument [Line Items]
Income recognized from tax credit transactions			$ 5,000,000.0
Fund II \| Mortgages
Debt Instrument [Line Items]
Number of mortgage loans \| loan				1
Fund IV \| Mortgages
Debt Instrument [Line Items]
Number of mortgage loans \| loan				3
Repayments of debt				$ 38,200,000
Fund IV \| Mortgages Two
Debt Instrument [Line Items]
Repayments of debt				$ 18,400,000
Fund V \| Mortgages
Debt Instrument [Line Items]
Number of mortgage loans \| loan				5
Fund III \| Mortgages
Debt Instrument [Line Items]
Repayments of debt				$ 4,700,000
Fund III \| Mortgages One
Debt Instrument [Line Items]
Repayments of debt				9,800,000
Core Portfolio
Debt Instrument [Line Items]
Derivative, notional amount		562,297,000
Core Portfolio \| Mortgages \| Brandywine Portfolio
Debt Instrument [Line Items]
Debt default, amount		$ 26,300,000		$ 26,300,000
Debt instrument, maturity date		Jul. 01, 2016
Interest rate, stated percentage		6.00%
Debt default interest		5.00%
Claim amount exclusive of accruing interest, default interest, late charges, and fees and costs	$ 33,000,000.0
LIBOR \| Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate				1.70%
LIBOR \| Mortgages \| Maturing from May 2019 to January 2021
Debt Instrument [Line Items]
Basis spread on variable rate				2.08%
LIBOR \| Mortgages \| Maturing from April 2022 though December 2024.
Debt Instrument [Line Items]
Basis spread on variable rate				1.86%
LIBOR \| Mortgages \| Maturities Ranging from November 2019 through January 2020
Debt Instrument [Line Items]
Basis spread on variable rate				3.65%
LIBOR \| Mortgages \| Maturing Ranging from December 2020 though May 2021
Debt Instrument [Line Items]
Basis spread on variable rate				2.96%
LIBOR \| Fund IV \| Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate				2.35%
LIBOR \| Fund III \| Mortgages
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Interest Rate Swaps
Debt Instrument [Line Items]
Derivative, notional amount		$ 50,000,000.0