Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 46,673	$ 51,370
Accounts and notes receivable, net of allowance for doubtful accounts of $1,982 and $2,001 as of March 31, 2018 and December 31, 2017, respectively	94,345	105,245
Inventory, net	15,529	14,283
Restricted cash	73,003	48,328
Prepaid expenses, deferred costs, and other current assets	121,298	96,106
Total current assets	350,848	315,332
Property and equipment, net of accumulated depreciation of $403,473 and $404,141 as of March 31, 2018 and December 31, 2017, respectively	487,695	497,902
Intangible assets, net	195,378	209,862
Goodwill	779,394	774,939
Deferred tax asset, net	5,948	6,925
Prepaid expenses, deferred costs, and other noncurrent assets	75,245	57,756
Total assets	1,894,508	1,862,716
Current liabilities:
Current portion of other long-term liabilities	22,877	31,370
Accounts payable	32,332	44,235
Accrued liabilities	330,424	306,945
Total current liabilities	385,633	382,550
Long-term liabilities:
Long-term debt	915,586	917,721
Asset retirement obligations	61,392	59,920
Deferred tax liability, net	42,394	37,130
Other long-term liabilities	70,921	75,002
Total liabilities	1,475,926	1,472,323
Commitments and contingencies (See Note 14)
Shareholders' equity:
Ordinary shares, $0.01 nominal value; 45,921,203 and 45,696,338 issued and outstanding as of March 31, 2018 and December 31, 2017, respectively	459	457
Additional paid-in capital	316,996	316,940
Accumulated other comprehensive loss, net	(8,610)	(33,595)
Retained earnings	109,835	106,670
Total parent shareholders' equity	418,680	390,472
Noncontrolling interests	(98)	(79)
Total shareholders' equity	418,582	390,393
Total liabilities and shareholders' equity	$ 1,894,508	$ 1,862,716

The aggregate of amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.

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- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).