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Cash and cash equivalents:
 12 Months Ended
Dec. 31, 2018
Cash and cash equivalents [abstract]  
Disclosure of cash and cash equivalents [text block]
Note 5 - Cash and cash equivalents:
 
 
 
December 31,
 
 
 
 
 
 
 
 
 
 
2017
 
 
2018
 
 
 
 
 
 
 
 
Cash and cash held at banks
 
Ps
4,417,791
 
 
Ps
3,713,072
 
Short-term investments
 
 
240,701
 
 
 
841,295
 
Fiduciary rights
(*)
 
 
18,962
 
 
 
30,140
 
 
 
 
 
 
 
 
 
 
Total cash and cash equivalents
 
Ps
4,677,454
 
 
Ps
4,584,507
 
 
(*)
Corresponds to the fiduciary’s agreement 2875 of Airplan, Company’s subsidiary, signed with Fiduciaria Bancolombia to administer the resources of the concession contract. See Notes 8.2 and 18.5.
 
5.1) Restricted cash and cash equivalents
 
At December 31, 2017 and 2018 restricted cash and cash equivalents includes Ps
106,350
and Ps
47,332
,  respectively, that amount was collected by Aerostar from PFCs and are restricted to funding investment projects in airport infrastructure authorized by the FAA.  See Notes 18.6 and 9.