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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The cash inflow from the additional capital contribution to the entity.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Subsequent Events - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions						12 Months Ended
	Jan. 15, 2021	Jan. 11, 2021	Nov. 08, 2019	Jul. 18, 2019	Feb. 01, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Proceeds from sale of common shares, net of offering costs						$ 411,101	$ 2,533,210	$ 94,239
Minimum [Member]
Subsequent Event [Line Items]
Commitment fee					0.125%
Maximum [Member]
Subsequent Event [Line Items]
Commitment fee					0.30%
Term Loan [Member]
Subsequent Event [Line Items]
Amount of senior unsecured debt					$ 200,000
Debt instrument maturity date					Feb. 01, 2022
Unsecured Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Amount of senior unsecured debt					$ 1,300,000
Debt instrument, maturity month and year					2021-02
Alternate Base Rate [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Applicable margin for revolving loans					0.00%
Alternate Base Rate [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Applicable margin for revolving loans					0.65%
Eurodollar Loans [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Applicable margin for revolving loans					0.875%
Eurodollar Loans [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Applicable margin for revolving loans					1.65%
Subsequent Event [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Commitment fee	0.125%
Subsequent Event [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Commitment fee	0.30%
Subsequent Event [Member] \| Term Loan [Member]
Subsequent Event [Line Items]
Amount of senior unsecured debt	$ 200,000
Debt instrument maturity date	Feb. 01, 2026
Subsequent Event [Member] \| Unsecured Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Debt instrument, maturity month and year	2024-02
Subsequent Event [Member] \| Alternate Base Rate [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Applicable margin for term loan	0.00%
Applicable margin for revolving loans	0.00%
Subsequent Event [Member] \| Alternate Base Rate [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Applicable margin for term loan	0.85%
Applicable margin for revolving loans	0.55%
Subsequent Event [Member] \| Eurodollar Loans [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Applicable margin for term loan	0.85%
Applicable margin for revolving loans	0.825%
Subsequent Event [Member] \| Eurodollar Loans [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Applicable margin for term loan	1.85%
Applicable margin for revolving loans	1.55%
Public Offering [Member]
Subsequent Event [Line Items]
Proceeds from sale of common shares, net of offering costs			$ 1,026,000	$ 6,750
Public Offering [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Shares issued in underwritten public offering		36.8
Proceeds from sale of common shares, net of offering costs		$ 711,000
Over-Allotment Option [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Shares issued in underwritten public offering		4.8