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Financial Information Related to Guarantor Subsidiaries (Details 2) (USD $)
In Thousands
3 Months Ended9 Months Ended3 Months Ended9 Months Ended3 Months Ended9 Months Ended3 Months Ended9 Months Ended3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Parent [Member]
Sep. 30, 2010
Parent [Member]
Sep. 30, 2011
Parent [Member]
Sep. 30, 2010
Parent [Member]
Sep. 30, 2011
Issuer [Member]
Sep. 30, 2010
Issuer [Member]
Sep. 30, 2011
Issuer [Member]
Sep. 30, 2010
Issuer [Member]
Sep. 30, 2011
Guarantor Subsidiaries [Member]
Sep. 30, 2010
Guarantor Subsidiaries [Member]
Sep. 30, 2011
Guarantor Subsidiaries [Member]
Sep. 30, 2010
Guarantor Subsidiaries [Member]
Sep. 30, 2011
Non-Guarantor Subsidiaries [Member]
Sep. 30, 2010
Non-Guarantor Subsidiaries [Member]
Sep. 30, 2011
Non-Guarantor Subsidiaries [Member]
Sep. 30, 2010
Non-Guarantor Subsidiaries [Member]
Sep. 30, 2011
Consolidation, Eliminations [Member]
Dec. 31, 2010
Consolidation, Eliminations [Member]
Cash flows from operating activities:                      
Net income (loss)$ 59,580$ 33,217$ 123,192$ 78,808$ (35,102)$ (19,089)$ (67,451)$ (39,292)$ (24,086)$ (29,707)$ (76,439)$ (99,767)$ 126,522$ 87,194$ 299,087$ 216,601$ (7,754)$ (5,181)$ (32,005)$ 1,266  
Adjustments to reconcile net income (loss) to net cash provided by operating activities:                      
Depreciation, depletion, amortization and accretion64,87556,805187,552162,152    13112938838654,39547,040154,827134,20510,3499,63632,33727,561  
Deferred income taxes  38,9001,282  39,5032,236          (603)(954)  
Excess tax benefit from stock-based compensation  (10,262)(195)  (10,262)(195)              
Stock-based and performance share unit compensation expense  10,27318,347      10,27318,347          
Retirement and deferred compensation plans expense  1,9945,035      1,9945,035          
(Earnings)/losses from equity-method investments, net of cash received  (12,187)416      (11,061)4,524      (1,126)(4,108)  
Amortization of debt acquisition costs and note discount  19,33317,857      19,32117,857      12   
Gain on sale of businesses  (8,558)           (8,558)       
Other reconciling items, net  (4,659)(3,743)      (1,279)(244)  (3,380)(3,499)      
Changes in operating assets and liabilities, net of acquisitions and dispositions:                      
Accounts receivable  (28,599)(131,504)      (1,072)(338)  (23,515)(121,501)  (4,012)(9,665)  
Inventory and other current assets  11,415118,619      9944  14,281122,755  (2,965)(4,180)  
Accounts payable  3,064(1,547)      (2,956)(1,202)  2,8301,035  3,190(1,380)  
Accrued expenses  27,20721,710  (13)11  9,8102,249  11,03414,144  6,3765,306  
Income taxes  77736,482  5,44438,940          (4,667)(2,458)  
Other, net  2,68313,031  (44)(1,054)  (4,798)(1,956)  8,39517,508  (870)(1,467)  
Net cash provided by (used in) operating activities  362,125336,750  (32,823)646  (55,720)(55,065)  455,001381,248  (4,333)9,921  
Cash flows from investing activities:                      
Payments for capital expenditures  (329,229)(238,812)      (70)   (263,983)(153,336)  (65,176)(85,476)  
Purchases of short-term investments, net  (223,491)       (223,491)           
Acquisitions of businesses, net of cash acquired  (748)(262,048)          (200)(55,276)  (548)(206,772)  
Cash proceeds from sale of businesses  22,349           22,349       
Other, net  (720)(6,269)       963  (720)(6,980)   (252)  
Intercompany receivables/payables      10,648(2,742)  123,465(128,846)  (212,895)(169,464)  78,782301,052  
Net cash provided by (used in) investing activities  (531,839)(507,129)  10,648(2,742)  (100,096)(127,883)  (455,449)(385,056)  13,0588,552  
Cash flows from financing activities:                      
Net borrowings on revolving credit facility  (175,000)16,500      (175,000)16,500          
Proceeds from long-term debt  500,000       500,000           
Principal payments on long-term debt  (405)(405)              (405)(405)  
Payment of debt acquisition costs  (9,558)(5,164)      (9,558)(5,164)          
Proceeds from exercise of stock options  10,211396  10,211396              
Excess tax benefit from stock-based compensation  10,262195  10,262195              
Proceeds from issuance of stock through employee benefit plans  1,7021,505  1,7021,505              
Other  (8,453)(2,100)      (6,100)       (2,353)(2,100)  
Net cash provided by (used in) financing activities  328,75910,927  22,1752,096  309,34211,336      (2,758)(2,505)  
Effect of exchange rate changes on cash  409328              409328  
Net increase (decrease) in cash and cash equivalents  159,454(159,124)      153,526(171,612)  (448)(3,808)  6,37616,296  
Cash and cash equivalents at beginning of period  50,727206,505  00  0171,903  5,4934,871  45,23429,73100
Cash and cash equivalents at end of period$ 210,181$ 47,381$ 210,181$ 47,381$ 0$ 0$ 0$ 0$ 153,526$ 291$ 153,526$ 291$ 5,045$ 1,063$ 5,045$ 1,063$ 51,610$ 46,027$ 51,610$ 46,027$ 0$ 0