Revenue Recognition - Summary of Disaggregation of Revenue By Revenue Source and Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 19, 2019	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Total revenues	$ 118,452	$ 443,781	$ 120,925	$ 540,778
Service [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	91,280	339,793	93,682	410,927
Service [Member] | Maritime [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	81,170	308,090	81,395	368,498
Service [Member] | Destination Resorts [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	10,110	31,703	12,287	42,429
Product [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	27,172	103,988	27,243	129,851
Product [Member] | Maritime [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	25,794	99,308	23,441	123,761
Product [Member] | Destination Resorts [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	633	2,003	975	2,524
Product [Member] | Timetospa.com [Member]
Disaggregation Of Revenue [Line Items]
Total revenues	$ 745	$ 2,677	$ 2,827	$ 3,566