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Consolidated Statements of Comprehensive Income (Parenthetical)
Apr. 25, 2019
$ / $
Dec. 31, 2018
$ / $
Dec. 31, 2018
Q / $
Dec. 31, 2018
₡ / $
Dec. 31, 2017
$ / $
Dec. 31, 2017
Q / $
Dec. 31, 2017
₡ / $
Dec. 31, 2016
$ / $
Dec. 31, 2016
Q / $
Dec. 31, 2016
₡ / $
Consolidated Statements of Comprehensive Income                    
Convenience translation to U.S. dollars 18.9578 19.6829 7.7440 609.6100 19.7354 7.3448 572.5600 20.6640 7.5221 561.1000