Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Details)

v2.3.0.15
Significant Accounting Policies (Details) (USD $)
In Thousands, except Per Share data
 3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2010
Consolidated Balance Sheet          
Paid-in-capital in excess of par value $ 280,515   $ 280,515   $ 248,693
Retained earnings 271,860   271,860   265,686
Consolidated Statements of Income          
Income Taxes 42,980 19,879 116,852 62,048  
Net Income 108,022 78,884 307,221 212,930  
Basic earnings per share $ 0.92 $ 0.67 $ 2.60 $ 1.79  
Diluted earnings per share $ 0.87 $ 0.63 $ 2.44 $ 1.69  
Common share amounts used to compute earnings per share          
Weighted average shares used in basic computations 116,975 118,442 118,059 119,286  
Dilutive effect of exercise of equity grants outstanding 7,034 6,731 7,572 6,516  
Dilutive effect of warrants 266 440 258 414  
Weighted average shares used in diluted computations 124,275 125,613 125,889 126,216  
Consolidated Statement of Cash Flows          
Net income 108,022 78,884 307,221 212,930  
Excess tax benefits from share-based payment arrangements     (24,030) (6,572)  
Increase (Decrease) in Income Taxes Payable     35,914 (16,955)  
Net cash provided by operating activities     393,626 271,121  
Excess tax benefits from share-based payment arrangements     24,030 6,572  
Net cash used in financing activities     (252,919) (168,469)  
As Reported [Member]
          
Consolidated Balance Sheet          
Paid-in-capital in excess of par value         257,375
Retained earnings         257,004
Consolidated Statements of Income          
Income Taxes   23,024   65,435  
Net Income   75,739   209,543  
Basic earnings per share   $ 0.64   $ 1.76  
Diluted earnings per share   $ 0.61   $ 1.68  
Common share amounts used to compute earnings per share          
Weighted average shares used in basic computations   118,442   119,286  
Dilutive effect of exercise of equity grants outstanding   5,010   4,800  
Dilutive effect of warrants   440   414  
Weighted average shares used in diluted computations   123,892   124,500  
Consolidated Statement of Cash Flows          
Net income   75,739   209,543  
Excess tax benefits from share-based payment arrangements       (9,959)  
Increase (Decrease) in Income Taxes Payable       (13,568)  
Net cash provided by operating activities       267,734  
Excess tax benefits from share-based payment arrangements       9,959  
Net cash used in financing activities       (165,082)  
As Adjusted [Member]
          
Consolidated Balance Sheet          
Paid-in-capital in excess of par value         248,693
Retained earnings         265,686
Consolidated Statements of Income          
Income Taxes   19,879   62,048  
Net Income   78,884   212,930  
Basic earnings per share   $ 0.67   $ 1.79  
Diluted earnings per share   $ 0.63   $ 1.69  
Common share amounts used to compute earnings per share          
Weighted average shares used in basic computations   118,442   119,286  
Dilutive effect of exercise of equity grants outstanding   6,731   6,516  
Dilutive effect of warrants   440   414  
Weighted average shares used in diluted computations   125,613   126,216  
Consolidated Statement of Cash Flows          
Net income   78,884   212,930  
Excess tax benefits from share-based payment arrangements       (6,572)  
Increase (Decrease) in Income Taxes Payable       (16,955)  
Net cash provided by operating activities       271,121  
Excess tax benefits from share-based payment arrangements       6,572  
Net cash used in financing activities       (168,469)  
As Computed Under Prior Method [Member]
          
Consolidated Statements of Income          
Income Taxes 44,594   120,800    
Net Income 106,408   303,273    
Basic earnings per share $ 0.91   $ 2.57    
Diluted earnings per share $ 0.87   $ 2.45    
Consolidated Statement of Cash Flows          
Net income $ 106,408   $ 303,273