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Beneficiaries Equity of the Parent Company - Textual (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 14, 2021 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jan. 03, 2019
Class of Stock [Line Items] |  |  |  |  |  |
Dividends, common stock | $ 32,800,000 |  |  |  |  |
Share repurchase, authorized amount |  |  |  |  |  | $ 150,000,000
Shares repurchased and retired (in shares) |  |  |  | 0 | 6,248,483 |
Share price (in dollars per share) |  |  |  |  | $ 9.60 |
Value of stock repurchased and retired |  | $ 6,141,000 | $ 53,858,000 |  | $ 60,000,000.0 |
One and Two Commerce Square |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Units issued to acquire noncontrolling interest |  |  |  | 226,695 |  |
Percent of noncontrolling interest acquired |  |  |  | 1.00% |  |
Dividend declared |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Dividends payable (in dollars per share) | $ 0.19 |  |  |  |  |
Redeemable Common Limited Partnership Units |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Redeemable common limited partnership units (in shares) |  |  |  | 823,983 | 981,634 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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