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Derivative Instruments - Offsetting Liabilities (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 34,877	$ 49,456
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Liabilities Presented on the Condensed Consolidated Balance Sheets	34,877
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 Pledged	0
Net Liabilities Exposed	23,904
Counterparty A
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	6,445
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Liabilities Presented on the Condensed Consolidated Balance Sheets	6,445
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 Pledged	0
Net Liabilities Exposed	5,721
Counterparty B
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	15,043
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Liabilities Presented on the Condensed Consolidated Balance Sheets	15,043
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 Pledged	0
Net Liabilities Exposed	11,156
Counterparty C
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	12,211
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Liabilities Presented on the Condensed Consolidated Balance Sheets	12,211
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 Pledged	0
Net Liabilities Exposed	10,182
Counterparty D
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	1,114
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Liabilities Presented on the Condensed Consolidated Balance Sheets	1,114
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 Pledged	0
Net Liabilities Exposed	(2,657)
Counterparty E
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	64
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts of Liabilities Presented on the Condensed Consolidated Balance Sheets	64
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 Pledged	0
Net Liabilities Exposed	$ (498)

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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

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