Leases - Narrative (Details) $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)
Leases [Abstract]
Remeasurement of existing lease right-of-use assets	$ (4.4)

Increase (Decrease) in Operating Lease Right-Of-Use Asset

No definition available.

Name:	cnr_IncreaseDecreaseInOperatingLeaseRightOfUseAsset
Namespace Prefix:	cnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration