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Commitments And Contingencies (Ground Lease Agreements) (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Commitments And Contingencies [Abstract]
Ground lease expense incurred
$ 550,000
$ 590,000
X
- Definition
Operating Lease, Expense, Including Sublease Rentals
+ References
No definition available.
+ Details
Name:
cli_OperatingLeaseExpenseIncludingSubleaseRentals
Namespace Prefix:
cli_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration