Derivative Instruments - Offsetting Assets (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	$ 10,973	$ 3,221
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Assets Presented on the Condensed Consolidated Balance Sheets	10,973
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(10,973)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Received	0
Net Assets Exposed	0
Counterparty A
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	724
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Assets Presented on the Condensed Consolidated Balance Sheets	724
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(724)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Received	0
Net Assets Exposed	0
Counterparty B
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	3,887
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Assets Presented on the Condensed Consolidated Balance Sheets	3,887
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(3,887)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Received	0
Net Assets Exposed	0
Counterparty C
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	2,029
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Assets Presented on the Condensed Consolidated Balance Sheets	2,029
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(2,029)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Received	0
Net Assets Exposed	0
Counterparty D
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	3,771
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Assets Presented on the Condensed Consolidated Balance Sheets	3,771
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(3,771)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Received	0
Net Assets Exposed	0
Counterparty E
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets	562
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Assets Presented on the Condensed Consolidated Balance Sheets	562
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Financial Instruments	(562)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets, Cash Collateral Received	0
Net Assets Exposed	$ 0

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, after effects of master netting arrangements, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against an obligation to return collateral. Includes assets not subject to a master netting arrangement and not elected to be offset.

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