Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 25,049	$ 26,297
Accounts and notes receivable, net of allowance of $2,401 and $2,079 as of March 31, 2016 and December 31, 2015, respectively	73,924	72,009
Inventory, net	9,652	10,675
Restricted cash	28,591	31,565
Current portion of deferred tax asset, net		16,300
Prepaid expenses, deferred costs, and other current assets	57,740	56,678
Total current assets	194,956	213,524
Property and equipment, net of accumulated depreciation of $376,050 and $360,722 as of March 31, 2016 and December 31, 2015, respectively	369,032	375,488
Intangible assets, net	140,508	150,780
Goodwill	546,392	548,936
Deferred tax asset, net	13,299	11,950
Prepaid expenses, deferred costs, and other noncurrent assets	22,989	19,257
Total assets	1,287,176	1,319,935
Current liabilities:
Current portion of other long-term liabilities	32,194	32,732
Accounts payable	27,117	25,850
Accrued liabilities	217,096	219,058
Total current liabilities	276,407	277,640
Long-term liabilities:
Long-term debt	540,314	568,331
Asset retirement obligations	52,009	51,685
Deferred tax liability, net	3,693	21,829
Other long-term liabilities	46,519	30,657
Total liabilities	$ 918,942	$ 950,142
Commitments and contingencies (See Note 13)
Stockholders' equity:
Common stock, $0.0001 par value; 125,000,000 shares authorized; 52,524,969 and 52,129,395 shares issued as of March 31, 2016 and December 31, 2015, respectively; 45,220,304 and 44,953,620 shares outstanding as of March 31, 2016 and December 31, 2015, respectively	$ 5	$ 5
Additional paid-in capital	377,564	374,564
Accumulated other comprehensive loss, net	(104,083)	(88,126)
Retained earnings	201,281	185,897
Treasury stock: 7,304,665 and 7,175,775 shares at cost as of March 31, 2016 and December 31, 2015, respectively	(106,529)	(102,566)
Total parent stockholders' equity	368,238	369,774
Noncontrolling interests	(4)	19
Total stockholders' equity	368,234	369,793
Total liabilities and stockholders' equity	$ 1,287,176	$ 1,319,935