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Supplemental Cash Flow Information - Summary of Supplemental (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Supplemental cash flow information: |  |  |
Interest paid, net of capitalized interest | $ 209,843 | $ 201,784 | $ 275,690
Income taxes paid (refunded) | (786) | 1,426 | 4,480
Capitalized interest | 27,041 | 30,459 | 21,056
Accrued construction costs | 95,293 | 126,006 | 88,826
Retained equity method investment from U.K. JV transaction | 0 | 0 | 104,922
Derecognition of U.K. Bridge Loan receivable | 0 | 0 | 147,474
Consolidation of net assets related to U.K. Bridge Loan | 0 | 0 | 106,457
Vesting of restricted stock units and conversion of non-managing member units into common stock | 4,746 | 5,614 | 537
Net noncash impact from the consolidation of previously unconsolidated joint ventures | 369,223 | 17,850 | 68,293
Mortgages assumed with real estate acquisitions | 251,280 | 172,565 | 8,457
Noncash or Part Noncash Acquisition, Other Liabilities Assumed | 307,954 | 0 | 0
Conversion of DFLs to real estate | 0 | 350,540 | 0
Retained investment in connection with SWF SH JV | 0 | 427,328 | 0
Seller financing provided on disposition of real estate asset | $ 73,498 | $ 44,812 | $ 0

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- Definition Future cash outflow to pay for construction in progress expenditures that have occurred. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4313-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
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