CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 6,117	$ 2,774
Accounts receivable trade, net of allowance for doubtful accounts of $3,341 and $2,979, respectively	407,046	373,633
Accounts receivable, related parties	7,206	7,669
Inventories	44,501	44,598
Prepaid expenses and other current assets	20,295	17,842
Total current assets	485,165	446,516
Property and equipment	1,051,970	1,034,995
Accumulated depreciation	(578,220)	(560,886)
Property and equipment, net	473,750	474,109
Goodwill	275,795	273,421
Other intangible assets, net	152,215	156,066
Other assets	4,084	6,256
Total assets	1,391,009	1,356,368
Current liabilities
Accounts payable	62,415	52,579
Accounts payable and accrued expenses, related parties	2,600	2,772
Accrued salaries and benefits	20,222	21,324
Accrued insurance	11,928	12,510
Sales tax payable	12,570	12,931
Accrued expenses and other current liabilities	91,400	81,112
Current portion of capital lease obligations	1,706	1,965
Total current liabilities	202,841	185,193
Accrued lease obligations	18,321	18,979
Other long term liabilities	13,577	13,827
Long-term debt	75,000	75,000
Total liabilities	309,739	292,999
Commitments and contingencies (Note 9)
Additional paid-in capital	675,895	673,141
Accumulated deficit	(7,760)	(17,859)
Accumulated other comprehensive income	43	302
Total stockholders’ equity	669,244	656,647
Noncontrolling interests	412,026	406,722
Total equity	1,081,270	1,063,369
Total liabilities and equity	1,391,009	1,356,368
Class A Common Stock
Current liabilities
Common stock	662	592
Total equity	662	592
Class A-2 Common Stock
Current liabilities
Common stock		67
Total equity		67
Class B Common Stock
Current liabilities
Common stock	404	404
Total equity	$ 404	$ 404