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Subsequent Events (Details) ¥ in Millions, $ in Millions	Jul. 02, 2025 USD ($)	Nov. 02, 2022 USD ($)	Nov. 12, 2021 USD ($)	May 31, 2025 USD ($)	May 31, 2025 CNY (¥)	Nov. 02, 2022 CNY (¥)
New Credit Facility | Subsequent Event | Minimum | SOFR
Subsequent Event [Line Items]
Interest spread on variable rate	1.25%
New Credit Facility | Subsequent Event | Minimum | Base Rate
Subsequent Event [Line Items]
Interest spread on variable rate	0.25%
New Credit Facility | Subsequent Event | Maximum | SOFR
Subsequent Event [Line Items]
Interest spread on variable rate	2.50%
New Credit Facility | Subsequent Event | Maximum | Base Rate
Subsequent Event [Line Items]
Interest spread on variable rate	1.50%
Revolving Credit Facility
Subsequent Event [Line Items]
Credit facility, maximum borrowing capacity		$ 1.8		$ 1.9	¥ 13.4	¥ 13.4
Interest spread on variable rate		0.80%
Revolving Credit Facility | New Credit Facility
Subsequent Event [Line Items]
Credit facility, maximum borrowing capacity			$ 175.0
Option to increase capacity, amount			75.0
Revolving Credit Facility | New Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Credit facility, maximum borrowing capacity	$ 50.0
Option to increase capacity, amount	15.0
Standby Letters of Credit | New Credit Facility
Subsequent Event [Line Items]
Credit facility, maximum borrowing capacity			10.0
Standby Letters of Credit | New Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Credit facility, maximum borrowing capacity	$ 10.0
Swingline | New Credit Facility
Subsequent Event [Line Items]
Credit facility, maximum borrowing capacity			$ 20.0

X

- Definition

Line Of Credit Facility, Option To Increase Capacity, Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	rgp_
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Balance Type:	credit
Period Type:	duration

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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Balance Type:	credit
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X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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