v2.4.0.8
Condensed Consolidated Statements of Changes in Capital (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Increase (Decrease) in Stockholders' Equity:        
Beginning Balance     $ 2,270,580 $ 2,164,453
Common shares issued for compensation     2,805 2,213
Share-based compensation 2,400 2,900 4,708 5,072
Net effect of restricted and performance shares issued and stock options exercised     (3,446) (2,378)
Dividends to shareholders     (30,842) (15,329)
Other comprehensive income (loss)     (70,318) 10,014
Net income 50,451 58,453 163,301 114,098
Ending Balance 2,336,788 2,278,143 2,336,788 2,278,143
Common Stock
        
Increase (Decrease) in Stockholders' Equity:        
Beginning Balance     619 346
Common shares issued for compensation     0 0
Share-based compensation     0 0
Net effect of restricted and performance shares issued and stock options exercised     2 1
Dividends to shareholders     0 0
Other comprehensive income (loss)     0 0
Net income     0 0
Ending Balance 621 347 621 347
Additional Paid-in Capital
        
Increase (Decrease) in Stockholders' Equity:        
Beginning Balance     341,780 538,625
Common shares issued for compensation     2,805 2,213
Share-based compensation     4,708 5,072
Net effect of restricted and performance shares issued and stock options exercised     (3,448) (2,379)
Dividends to shareholders     0 0
Other comprehensive income (loss)     0 0
Net income     0 0
Ending Balance 345,845 543,531 345,845 543,531
Accumulated Other Comprehensive Income (Loss)
        
Increase (Decrease) in Stockholders' Equity:        
Beginning Balance     145,380 130,037
Common shares issued for compensation     0 0
Share-based compensation     0 0
Net effect of restricted and performance shares issued and stock options exercised     0 0
Dividends to shareholders     0 0
Other comprehensive income (loss)     (70,318) 10,014
Net income     0 0
Ending Balance 75,062 140,051 75,062 140,051
Retained Earnings
        
Increase (Decrease) in Stockholders' Equity:        
Beginning Balance     1,782,857 1,699,853
Common shares issued for compensation     0 0
Share-based compensation     0 0
Net effect of restricted and performance shares issued and stock options exercised     0 0
Dividends to shareholders     (30,842) (15,329)
Other comprehensive income (loss)     0 0
Net income     163,301 114,098
Ending Balance 1,915,316 1,798,622 1,915,316 1,798,622
Treasury Stock
        
Increase (Decrease) in Stockholders' Equity:        
Beginning Balance     (56) (204,408)
Common shares issued for compensation     0 0
Share-based compensation     0 0
Net effect of restricted and performance shares issued and stock options exercised     0 0
Dividends to shareholders     0 0
Other comprehensive income (loss)     0 0
Net income     0 0
Ending Balance $ (56) $ (204,408) $ (56) $ (204,408)