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Consolidated Statement of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities      
Net income $ 198,744 $ 159,158 $ 231,315
Add (deduct) adjustments to reconcile net income to net cash flows from operating activities      
Depreciation, amortization and accretion 573,557 570,955 564,935
Bad debts expense 62,157 76,292 107,991
Stock-based compensation expense 20,183 18,044 16,362
Deferred income taxes, net 203,264 73,727 47,260
Equity in earnings of unconsolidated entities (83,566) (97,318) (96,800)
Distributions from unconsolidated entities 91,768 100,359 91,105
Loss on impairment of intangible assets     14,000
(Gain) loss on asset disposals and exchanges, net (1,873) 10,717 16,169
Gain on investment (11,373)    
Noncash interest expense 10,040 2,540 2,442
Other operating activities 102 (2,483) (24)
Changes in assets and liabilities from operations      
Accounts receivable (82,175) (75,252) (114,646)
Inventory (14,640) 40,277 (35,992)
Accounts payable - trade 28,410 (52,568) 36,195
Accounts payable - affiliate 1,392 (3,940) 5,119
Customer deposits and deferred revenues 34,927 6,180 (9,921)
Accrued taxes (39,984) (70,057) 48,218
Accrued interest 225 204 (2,121)
Other assets and liabilities (3,296) 77,552 (49,798)
Cash flows from operating activities 987,862 834,387 871,809
Cash flows from investing activities      
Cash used for additions to property, plant and equipment (771,798) (569,323) (530,769)
Cash received from divestitures     50
Cash paid for acquisitions and licenses (23,773) (17,101) (16,027)
Cash paid for investments (110,000) (250,250) (450)
Cash received for investments 145,250 60,330 120
Other investing activities 718 (953) 1,614
Cash flows from investing activities (759,603) (777,297) (545,462)
Cash flows from financing activities      
Repayment of long-term debt (330,338) (316) (140,236)
Issuance of long-term debt 342,000    
Common shares reissued for benefit plans, net of tax payments 1,935 509 (82)
Common shares repurchased (62,294) (52,827) (33,585)
Payment of debt issuance costs (11,400) (2,229) (4,421)
Distributions to noncontrolling interests (21,094) (19,631) (18,426)
Payments to acquire additional interest in subsidiaries   (8,786) (285)
Other financing activities 172 114 93
Cash flows from financing activities (81,019) (83,166) (196,942)
Net increase (decrease) in cash and cash equivalents 147,240 (26,076) 129,405
Cash and cash equivalents      
Beginning of period 276,915 302,991 173,586
End of period $ 424,155 $ 276,915 $ 302,991