Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 1,905	$ 4,612
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for losses on accounts receivable	308	489
(Reversal)/deferred gain on sales to equity method investee	(71)	157
Depreciation and amortization	32,328	36,034
Amortization of deferred financing fees	183	369
Deferred income tax expense	4,762	5,070
Income tax deficit arising from restricted share vesting	(111)
Unrealized loss on ineffective portion of fuel hedges	75	757
Casualty premium credit		(4,000)
Stock-based compensation expense	151	982
Equity in income of affiliate	(2,180)	(1,225)
Gain on disposition of property and equipment	(1,191)	(4,783)
Changes in operating assets and liabilities:
Receivables and advances	991	(11,317)
Prepaid expenses and other assets	(1,946)	3,521
Inventory and supplies	(58)	128
Insurance and claims accrual	(2,412)	3,550
Accounts payable and accrued expenses	(2,763)	6,452
Net cash flows provided by operating activities	29,971	40,796
Cash flows from investing activities:
Acquisition of property and equipment	(82,344)	(20,780)
Investment in affiliated company	(500)	(1,000)
Return of investment in affiliated company		139
Proceeds from disposition of property and equipment	39,420	52,851
Net cash flows (used in)/provided by investing activities	(43,424)	31,210
Cash flows from financing activities:
Change in checks outstanding in excess of bank balances	(3,045)	2,230
Proceeds from issuance of notes payable	77,960	7,320
Income tax deficit arising from restricted share vesting	111
Repayments of notes payable	(64,697)	(62,971)
Repayments of capital lease obligations	(1,555)	(1,492)
Proceeds/(repayments) under revolving credit facility, net	8,910	(13,291)
Payment of minimum tax withholdings on stock compensation	(203)	(6)
Debt refinancing costs	(348)	(27)
Net cash provided by/(used in) financing activities	17,133	(68,237)
Net change in cash and cash equivalents	3,680	3,769
Cash and cash equivalents at beginning of period	6,846	3,895
Cash and cash equivalents at end of period	10,526	7,664
Cash paid during the year for:
Equipment purchased under capital leases	$ 1,576