Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements Of Cash Flows

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Condensed Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Cash flows from operating activities:    
Net income $ 158,957 $ 129,971
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 93,265 80,795
(Gain) loss on sale of property and equipment (2,194) 789
Deferred income taxes 30,301 11,875
Other operating activities, net (26,943) (692)
Net cash provided by operating activities 253,386 222,738
Cash flows from investing activities:    
Purchase of property and equipment (229,199) (309,661)
Proceeds from sale of property and equipment 9,354 5,445
Net cash used in investing activities (219,845) (304,216)
Cash flows from financing activities:    
Proceeds from issuance of long-term debt 0 412
Principal payments under long-term debt agreements (36,290) (37,260)
Net proceeds (payments) from revolving line of credit 1,996 49,380
Net Change Other Financing Activities 0 (2)
Net cash provided by (used in) financing activities (34,294) 12,530
(Decrease) increase in cash and cash equivalents (753) (68,948)
Cash and cash equivalents at beginning of period 12,857 75,850
Cash and cash equivalents at end of period 12,104 6,902
Supplemental disclosure of noncash investing activities:    
Acquisition of property and equipment by capital lease $ 0 $ 1,094