Fair Value Measurements - Additional Information (Details)	3 Months Ended
Mar. 31, 2026 USD ($)
Fair Value Disclosures [Abstract]
Fair value, assets, transfers between levels 1, 2 and 3	$ 0
Fair value, liabilities, transfers between levels 1, 2 and 3	$ 0

Fair value measurement with unobservable inputs reconciliation recurring basis liability transfers level 1,2 and 3 net.

No definition available.

Name:	ck0000885275_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersLevel12And3Net
Namespace Prefix:	ck0000885275_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration