Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Net income	$ 4,263	$ 1,905
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for losses on accounts receivable	536	308
Reversal of deferred gain on sales to equity method investee	(54)	(71)
Depreciation and amortization	36,410	32,328
Gain on disposition of property and equipment	(1,934)	(1,191)
Amortization of deferred financing fees	185	183
Deferred income tax benefit	5,043	4,762
Income tax (benefit) deficit arising from restricted share vesting	(145)	111
Unrealized loss on ineffective portion of fuel hedges	525	75
Stock-based compensation expense	963	151
Equity in income of affiliate	(2,530)	(2,180)
Changes in operating assets and liabilities:
Receivables and advances	208	991
Prepaid expenses and other assets	704	(1,946)
Inventory and supplies	214	(58)
Insurance and claims accrual	6,212	(2,412)
Accounts payable and accrued expenses	(2,007)	(2,763)
Net cash flows provided by operating activities	48,593	30,193
Cash flows from investing activities:
Acquisition of property and equipment	(93,416)	(82,344)
Return on investment (investment) in affiliated company	307	(500)
Proceeds from disposition of property and equipment	69,159	39,420
Net cash flows used in investing activities	(23,950)	(43,424)
Cash flows from financing activities:
Change in checks outstanding in excess of bank balances	(2,918)	(3,045)
Proceeds from issuance of notes payable	64,565	77,960
Proceeds from the exercise of stock options	152
Income tax benefit (deficit) arising from restricted share vesting	145	(111)
Repayments of notes payable	(65,570)	(64,697)
Repayments of capital lease obligations	(5,840)	(1,555)
(Repayments)/proceeds under revolving credit facility, net	(6,983)	8,910
Payment of minimum tax withholdings on stock compensation	(174)	(203)
Debt refinancing costs	(49)	(348)
Net cash (used in) provided by financing activities	(16,672)	16,911
Net change in cash and cash equivalents	7,971	3,680
Cash and cash equivalents at beginning of period	9,263	6,846
Cash and cash equivalents at end of period	$ 17,234	$ 10,526