Property and equipment - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
	May 22, 2020	May 21, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Depreciation expense			$ 22,000	$ 25,600	$ 46,700	$ 47,700
Interest expense capitalized on qualifying assets			$ 0	$ 2,900	0	5,000
Lessor, Lease, Description [Line Items]
Cash consideration from sale of assets held for sale, after customary closing costs					$ 58,125	$ 6
Minimum
Lessor, Lease, Description [Line Items]
Contractual term			1 year		1 year
Maximum
Lessor, Lease, Description [Line Items]
Contractual term			3 years		3 years
Sale of Assets | Jewel Dunn's River Beach Resort & Span and Jewel Runaway Bay Beach Resort & Waterpark
Lessor, Lease, Description [Line Items]
Cash consideration for sale of assets	$ 60,000
Impairment loss recorded based on expected sale price of the properties		$ 25,300
Cash consideration from sale of assets held for sale, after customary closing costs	58,700
Loss recognized upon closing of sale	$ 1,800
Portion of net proceeds used to prepay Term Loan, deduction of incremental expenses and capital expenditures, period post sale	18 months