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Consolidated Condensed Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Net income (loss) $ 4,612 $ (12,022)
Provision for losses on accounts receivable 489 543
Deferred gain on sales to equity method investee 157  
Depreciation and amortization 36,034 39,490
Goodwill impairment   11,539
Amortization of deferred financing fees 369 296
Deferred income tax expense (benefit) 5,070 (1,792)
Income tax benefit arising from restricted share vesting   (432)
Deferred gain (reversal) on fuel hedges 757 (703)
Unrealized loss on ineffective portion of fuel hedges   150
Casualty premium credit (4,000)  
Stock-based compensation expense 982 1,066
Equity in income of affiliate (1,225) (475)
Gain on disposition of property and equipment (4,783) (5,987)
Receivables and advances (11,317) (2,079)
Prepaid expenses and other assets 3,521 3,244
Inventory and supplies 128 (81)
Insurance and claims accrual 3,550 (892)
Accounts payable and accrued expenses 6,452 (5,978)
Net cash flows provided by operating activities 40,796 25,887
Acquisition of property and equipment (20,780) (87,221)
Investment in affiliated company (1,000) (1,500)
Return of investment in affiliated company 139 241
Proceeds from disposition of property and equipment 52,851 51,869
Net cash flows provided by/(used in) investing activities 31,210 (36,611)
Change in checks outstanding in excess of bank balances 2,230 2,408
Proceeds from issuance of notes payable 7,320 60,465
Income tax benefit arising from restricted share vesting   432
Repayments of notes payable (62,971) (70,832)
Repayments of capital lease obligations (1,492) (1,194)
(Repayments)/proceeds under revolving credit facility, net (13,291) 14,051
Payment of minimum tax withholdings on stock compensation (6) (558)
Debt refinancing costs (27) (32)
Net cash used in financing activities (68,237) 4,740
Net change in cash and cash equivalents 3,769 (5,984)
Cash and cash equivalents at beginning of period 3,895 9,361
Cash and cash equivalents at end of period $ 7,664 $ 3,377