Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (7,768)	$ (69,745)	$ (87,458)	$ (22,556)	$ (77,513)	$ (110,014)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	20,017		22,400		40,900	47,359
Amortization of debt discount and issuance costs					2,036	679
Share-based compensation					6,629	5,942
(Gain) loss on derivative financial instruments					(4,596)	11,423
Impairment loss	0		25,268		24,011	41,441
Deferred income taxes					(15,716)	(12,573)
Loss on sale of assets	375		1,729		648	1,729
Amortization of key money					(198)	(439)
Bad debt expense					(47)	(79)	$ 3,100
Other					668	(75)
Changes in assets and liabilities:
Trade and other receivables, net					(13,924)	44,462
Accounts receivable from related parties					73	2,855
Inventories					(637)	950
Prepayments and other assets					7,711	470
Trade and other payables					19,410	(61,207)
Payables to related parties					(2,442)	1,640
Income tax payable					(224)	(1,439)
Other liabilities					(367)	(1,520)
Net cash used in operating activities					(13,578)	(28,396)
INVESTING ACTIVITIES
Capital expenditures					(8,449)	(7,414)
Receipt of key money					0	8,500	8,500
Purchase of intangibles					(55)	(349)
Proceeds from the sale of assets, net					89,064	58,125
Net cash provided by investing activities					80,560	58,862
FINANCING ACTIVITIES
Proceeds from debt issuances, net of discount					0	199,600
Issuance costs of debt					0	(8,677)
Proceeds from ordinary shares, net of issuance costs					137,716	19,558
Repayments of debt					(29,429)	(5,050)
Proceeds from borrowings on revolving credit facility					0	40,000
Repayments of borrowings on revolving credit facility					(84,667)	(15,333)
Repurchase of ordinary shares					0	(2,500)
Repurchase of ordinary shares for tax withholdings					(55)	(54)
Principal payments on lease obligations					(45)	0
Net cash provided by financing activities					23,520	227,544
INCREASE IN CASH AND CASH EQUIVALENTS					90,502	258,010
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF THE PERIOD		$ 172,860		$ 20,931	172,860	20,931	20,931
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF THE PERIOD	263,362		278,941		263,362	278,941	172,860
RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Cash and cash equivalents	237,715		251,022		237,715	251,022	146,919
Restricted cash	25,647		27,919		25,647	27,919	25,941
TOTAL CASH, CASH EQUIVALENTS AND RESTRICTED CASH	$ 263,362		$ 278,941		263,362	278,941	$ 172,860
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest					38,701	28,919
Cash paid for income taxes, net					580	2,040
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Capital expenditures incurred but not yet paid					1,328	1,590
Intangible assets capitalized but not yet paid					111	208
Par value of vested restricted share awards					$ 109	$ 93