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Related party transactions (Detail) $ in Thousands |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 30, 2019 USD ($) | Nov. 28, 2018 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jul. 02, 2020 CAD ($) | May 31, 2019 USD ($) | May 31, 2019 CAD ($) | May 24, 2019 USD ($) | May 24, 2019 CAD ($)
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Note payable to related party |  |  | $ 30,493,000 | $ 0 |  |  |  |  |
Interest income |  |  | 91,448,000 | 100,886,000 |  |  |  |  |
Fair value loss |  |  | (559,701,000) | (278,084,000) |  |  |  |  |
Amount reclassified from AOCI into earnings, net of tax |  |  | 4,698,000 | 3,579,000 |  |  |  |  |
Contributions from redeemable non-controlling interests |  |  | 3,717,000 | 3,403,000 |  |  |  |  |
Non-controlling interest incurred |  |  | (6,955,000) | (9,006,000) |  |  |  |  |
Distribution to redeemable non-controlling interest |  |  | 951,000 | 1,848,000 |  |  |  |  |
Non-controlling interests |  |  | 458,612,000 | 531,541,000 |  |  |  |  |
San Antonio Water System, Joint Venture |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Investments in joint venture |  |  |  | 1,500,000 | $ 1,581 |  |  |  |
Ownership interest acquired (percent) |  |  |  |  | 50.00% |  |  |  |
AYES Canada |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Interest income |  |  | 14,731,000 | 25,572,000 |  |  |  |  |
Fair value loss |  |  | (20,272,000) | 6,649,000 |  |  |  |  |
Non-controlling interests |  |  | 59,125,000 | 73,707,000 |  | $ 96,752,000 |  |  |
Redeemable Non-Controlling Interest |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Contributions from redeemable non-controlling interests |  | $ 305,000,000 |  |  |  |  |  |  |
Non-controlling interest incurred |  |  | 12,651,000 | 16,482,000 |  |  |  |  |
Distribution to redeemable non-controlling interest |  |  | 12,198,000 | 18,241,000 |  |  |  |  |
Redeemable Non-Controlling Interest | Secured Credit Facility |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Debt instrument, term |  | 3 years |  |  |  |  |  |  |
Secured credit facility, maximum borrowing capacity |  | $ 306,500,000 |  |  |  |  |  |  |
Related Party |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Distribution from interest in noncontrolling interest |  |  | 16,064,000 | 26,465,000 |  |  |  |  |
Equity Method Investee |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Reimbursement of expenses |  |  | 25,829,000 | 16,248,000 |  |  |  |  |
Development fees charged to the Company |  |  | (26,015,000) | (3,924,000) |  |  |  |  |
Equity Method Investee | Sugar Creek |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Exchange of notes receivable |  |  |  | 21,107,000 |  |  |  |  |
Amount reclassified from AOCI into earnings, before tax |  |  |  | 15,765,000 |  |  |  |  |
Amount reclassified from AOCI into earnings, net of tax |  |  |  | 11,412,000 |  |  |  |  |
Third party | San Antonio Water System, Joint Venture |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Investments in joint venture |  |  |  | 1,500,000 |  |  |  |  |
Related Party | AWUSA |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Exchange of notes receivable | $ 30,293,000 |  |  |  |  |  |  |  |
Gain (loss) on sale of investments | $ 0 |  |  |  |  |  |  |  |
Interest income |  |  |  | 6,007,000 |  |  |  |  |
Fair value loss |  |  |  | 6,007,000 |  |  |  |  |
Related Party | AYES Canada |  |  |  |  |  |  |  |  |
Transactions with Third Party [Line Items] |  |  |  |  |  |  |  |  |
Non-controlling interests |  |  |  |  |  | $ 96,752,000 | $ 130,103 | $ 96,752,000 | $ 130,103
Distribution from interest in noncontrolling interest |  |  | $ 16,064,000 | $ 26,465,000 |  |  |  |  |

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