Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 197,363	$ 174,242
Accounts and notes receivable	94,775	96,902
Less: Allowance for credit losses	(7,005)	(7,035)
Accounts and notes receivable, net	87,770	89,867
Inventory, net	6,210	6,598
Restricted cash	141,859	137,353
Prepaid expenses, deferred costs, and other current assets	50,338	53,953
Total current assets	483,540	462,013
Property and equipment, net of accumulated depreciation of $657,069 and $637,835 as of March 31, 2021 and December 31, 2020, respectively	412,861	429,842
Operating lease assets	56,434	60,368
Intangible assets, net net of accumulated amortization of $460,841 and $454,533 as of March 31, 2021 and December 31, 2020 , respectively	75,250	84,629
Goodwill	760,811	759,102
Deferred tax assets, net	17,774	17,382
Prepaid expenses, deferred costs, and other noncurrent assets	23,188	18,109
Total assets	1,829,858	1,831,445
Current liabilities:
Current portion of long-term debt	5,000	5,000
Current portion of other long-term liabilities	51,744	64,799
Accounts payable	46,053	39,901
Accrued liabilities	373,015	366,285
Total current liabilities	475,812	475,985
Long-term liabilities:
Long-term debt	772,693	773,177
Asset retirement obligations	56,859	56,973
Deferred tax liabilities, net	55,471	51,484
Operating lease liabilities	53,681	56,683
Other long-term liabilities	21,886	37,727
Total liabilities	1,436,402	1,452,029
Commitments and contingencies (See Note 13)
Shareholders' equity:
Ordinary shares, $0.01 nominal value; 45,255,680 and 44,539,433 issued and outstanding as of March 31, 2021 and December 31, 2020, respectively	453	445
Additional paid-in capital	333,596	343,042
Accumulated other comprehensive loss, net	(76,062)	(93,731)
Retained earnings	135,568	129,693
Total parent shareholders' equity	393,555	379,449
Noncontrolling interests	(99)	(33)
Total shareholders’ equity	393,456	379,416
Total liabilities and shareholders’ equity	$ 1,829,858	$ 1,831,445