Business combinations - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 01, 2018	Dec. 31, 2019	Dec. 31, 2018
Net assets acquired
Goodwill, net		$ 78,339	$ 83,656
Sagicor
Business Acquisition [Line Items]
Total purchase consideration	$ 308,528
Net assets acquired
Working capital	(1,665)
Property and equipment	298,349
Identifiable intangible assets and liabilities	(449)
Deferred income taxes	(20,483)
Goodwill, net	32,776
Total net assets acquired	308,528
As Previously Reported | Sagicor
Business Acquisition [Line Items]
Total purchase consideration	308,528
Net assets acquired
Working capital	(1,665)
Property and equipment	304,299
Identifiable intangible assets and liabilities	(449)
Deferred income taxes	(25,582)
Goodwill, net	31,925
Total net assets acquired	308,528
Adjustments | Sagicor
Business Acquisition [Line Items]
Total purchase consideration	0
Net assets acquired
Working capital	0
Property and equipment	(5,950)
Identifiable intangible assets and liabilities	0
Deferred income taxes	5,099
Goodwill, net	851
Total net assets acquired	$ 0