Commitments and Contingencies - Narrative (Details) $ in Millions	Jun. 30, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit and performance bonds	$ 1.2
Future obligations under leases to fund tenant improvements and other future construction obligations	$ 193.8

Outstanding letters of credit and performance bonds as of the balance sheet date.

No definition available.

Name:	cuz_OutstandingLettersOfCreditAndPerformanceBonds
Namespace Prefix:	cuz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant