Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 1,326	$ 5,687
Customer receivables, net of allowance of $207 and $63 at June 30, 2020 and December 31, 2019, respectively	185,035	183,706
Other receivables	16,573	15,253
Prepaid insurance and licenses	9,392	11,326
Operating supplies	7,950	7,193
Assets held for sale	12,715	17,732
Other current assets	14,553	15,831
Total current assets	247,544	256,728
Property and equipment, at cost	912,264	880,101
Less accumulated depreciation and amortization	(400,641)	(388,318)
Net property and equipment	511,623	491,783
Other assets
Operating lease right of use assets	277,362	276,618
Goodwill	59,221	57,708
Intangible assets, net	26,364	27,214
Other	31,327	30,058
Total other assets	394,274	391,598
Total assets	1,153,441	1,140,109
Current liabilities
Accounts payable	72,459	68,918
Book overdraft	4,945	1,313
Accrued wages and benefits	26,970	24,110
Claims and insurance accruals, current	48,881	51,910
Other accrued liabilities	6,642	9,127
Current portion of operating lease liabilities	70,438	69,866
Current maturities of long-term debt and finance leases	87,106	80,247
Total current liabilities	317,441	305,491
Long-term debt and finance leases, net of current maturities	295,858	315,797
Less debt issuance costs	(335)	(1,223)
Net long-term debt and finance leases	295,523	314,574
Deferred income taxes	20,993	20,692
Other long-term liabilities	12,325	5,249
Claims and insurance accruals, long-term	60,306	56,910
Noncurrent operating lease liabilities	206,616	206,357
Commitments and contingencies (Note 6)
Stockholders' Equity abstract
Additional paid-in capital	258,557	250,700
Accumulated deficit	(20,700)	(20,982)
Total stockholders' equity	238,351	230,208
Noncontrolling interest	1,886	628
Total stockholders' equity	240,237	230,836
Total liabilities and stockholders' equity	1,153,441	1,140,109
Class A common stock
Stockholders' Equity abstract
Common stock	336	333
Common Class B [Member]
Stockholders' Equity abstract
Common stock	$ 158	$ 157