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Consolidated Statement of Changes in Shareholders' Equity (USD $)
In Thousands
Total
Common stock [Member]
Additional paid-in capital
Retained earnings
Accumulated other comprehensive income
Treasury stock
Balance at Dec. 31, 2012 $ 3,542,612 $ 125,114 $ 1,052,253 $ 2,756,166 $ 295,271 $ (686,192)
Net earnings 105,850     105,850    
Other Comprehensive Income Loss Net Of Tax (27,171)       (27,171)  
Issuance of 222 shares for exercise of options, including tax effect 6,919 222 6,697      
Purchase of 734 common shares (28,769)         (28,769)
Stock-based compensation 2,380 58 2,322      
Cash dividends declared, $0.165 per share (16,572)     (16,572)    
Balance at Mar. 31, 2013 $ 3,585,249 $ 125,394 $ 1,061,272 $ 2,845,444 $ 268,100 $ (714,961)