Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 51,370	$ 73,534
Accounts and notes receivable, net of allowance for doubtful accounts of $2,001 and $1,931 as of December 31, 2017 and December 31, 2016, respectively	105,245	84,156
Inventory, net	14,283	12,527
Restricted cash	48,328	32,213
Prepaid expenses, deferred costs, and other current assets	96,106	67,107
Total current assets	315,332	269,537
Property and equipment, net of accumulated depreciation of $404,141 and $397,972 as of December 31, 2017 and December 31, 2016, respectively	497,902	392,735
Intangible assets, net	209,862	121,230
Goodwill	774,939	533,075
Deferred tax asset, net	6,925	13,004
Prepaid expenses, deferred costs, and other noncurrent assets	57,756	35,115
Total assets	1,862,716	1,364,696
Current liabilities:
Current portion of other long-term liabilities	31,370	28,237
Accounts payable	44,235	44,965
Accrued liabilities	306,945	240,618
Total current liabilities	382,550	313,820
Long-term liabilities:
Long-term debt	917,721	502,539
Asset retirement obligations	59,920	45,086
Deferred tax liability, net	37,130	27,625
Other long-term liabilities	75,002	18,691
Total liabilities	1,472,323	907,761
Commitments and contingencies (See Note 13)
Shareholders' equity:
Ordinary shares, $0.01 nominal value; 45,696,338 and 45,326,430 issued and outstanding as of December 31, 2017 and December 31, 2016, respectively	457	453
Additional paid-in capital	316,940	311,041
Accumulated other comprehensive loss, net	(33,595)	(107,135)
Retained earnings	106,670	252,656
Total parent shareholders' equity	390,472	457,015
Noncontrolling interests	(79)	(80)
Total shareholders' equity	390,393	456,935
Total liabilities and shareholders' equity	$ 1,862,716	$ 1,364,696