Other balance sheet items - Schedule of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Impairment of goodwill	$ 0	$ 19,800,000	$ 6,200,000
Goodwill [Roll Forward]
Gross carrying value	87,610,000	87,610,000
Accumulated impairment losses	(25,956,000)	(25,956,000)
Net carrying value	61,654,000	61,654,000
Yucatán Peninsula
Goodwill [Roll Forward]
Gross carrying value	51,731,000	51,731,000
Accumulated impairment losses	(6,168,000)	(6,168,000)
Net carrying value	45,563,000	45,563,000
Pacific Coast
Goodwill [Roll Forward]
Gross carrying value	0	0
Accumulated impairment losses	0	0
Net carrying value	0	0
Dominican Republic
Goodwill [Roll Forward]
Gross carrying value	0	0
Accumulated impairment losses	0	0
Net carrying value	0	0
Jamaica
Goodwill [Roll Forward]
Gross carrying value	35,879,000	35,879,000
Accumulated impairment losses	(19,788,000)	(19,788,000)
Net carrying value	$ 16,091,000	$ 16,091,000