Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Current assets:
Cash and cash equivalents	$ 15,508	$ 1,315
Trade receivables, net of allowance for doubtful accounts of $942 and $919 in 2014 and 2013, respectively	105,968	77,623
Prepaid expenses and other current assets	26,288	13,434
Tires in service	2,227	1,245
Equipment held for resale	3,148	9,923
Income tax receivable	6,395	9,506
Deferred income taxes	7,651	4,342
Total current assets	167,185	117,388
Property and equipment	643,888	612,236
Less accumulated depreciation and amortization	151,059	115,366
Net property and equipment	492,829	496,870
Tires in service	2,720	1,785
Goodwill	22,810	17,730
Investment in joint venture		4,604
Other assets	5,271	2,785
Total assets	690,815	641,162
Current liabilities:
Accounts payable	11,017	10,401
Accrued salaries and benefits	13,902	11,197
Accrued insurance and claims	11,568	10,092
Accrued fuel expense	11,306	7,461
Other accrued expenses	33,453	20,070
Current maturities of capital lease obligations	67,439	25,669
Current maturities of long-term debt	3,690
Total current liabilities	152,375	84,890
Capital lease obligations, net of current maturities	119,665	190,625
Long-term debt	83,497	78,137
Deferred income taxes	76,275	61,821
Stockholders' equity:
Common stock, $0.033 par value, authorized 40,000 shares; issued and outstanding 24,060 and 23,887 shares at June 30, 2014 and 2013, respectively	794	788
Treasury stock at cost; 500 and 696 shares at June 30, 2014 and 2013, respectively	(3,453)	(4,811)
Additional paid-in capital	107,579	103,749
Retained earnings	160,068	131,224
Accumulated other comprehensive loss	(5,985)	(5,261)
Total stockholders' equity	259,003	225,689
Total liabilities and stockholders' equity	$ 690,815	$ 641,162