Unaudited Condensed Consolidated Statement of Equity Statement (USD $)
In Thousands, unless otherwise specified
Total
Common Stock [Member]
Treasury Stock [Member]
Capital in Excess of Par Value [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest [Member]
Balance at beginning of period at Dec. 31, 2011 $ 1,412,195 $ 224,666 $ (1,710) $ 1,430,330 $ (367,044) $ 105,852 $ 20,101
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]              
Comprehensive income 138,742 0 0 0 126,163 10,979 1,600
Dividends declared on common stock (36,582) 0 0 (36,582) 0 0 0
Employee share-based compensation earned 8,217 0 0 8,217 0 0 0
Stock option exercises 17,347 2,853 0 14,494 0 0 0
Restricted stock awards, net of forfeitures 0 483 0 (483) 0 0 0
Purchase of Company common stock (144,607) 0 (12,400) (79,828) (52,379) 0 0
Purchase of noncontrolling interest 0            
Noncontrolling interest payment (405) 0 0 0 0 0 (405)
Other 948 82 0 866 0 0 0
Balance at end of period at Sep. 30, 2012              
Balance at beginning of period at Dec. 31, 2012 1,362,827 211,057 (10) 1,307,058 (286,795) 111,717 19,800
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]              
Comprehensive income 110,779 0 0 0 118,015 (9,768) 2,532
Dividends declared on common stock (42,371) 0 0 (42,371) 0 0 0
Employee share-based compensation earned 8,887 0 0 8,887 0 0 0
Stock option exercises 5,097 573 0 4,524 0 0 0
Restricted stock awards, net of forfeitures 0 378 (3) (375) 0 0 0
Purchase of Company common stock 1,851 0 117 717 1,017 0 0
Cancellation of Company Stock 0 (8) 8 0 0 0 0
Tax Benefits Related to Share-Based Awards (6,083)       (6,083) 0 0 0
Purchase of noncontrolling interest (8,333) 0 0 1,696 0 0 6,637
Noncontrolling interest payment (1,700) 0 0 0 0 0 (1,700)
Other 1,356 82 0 1,274 0 0 0
Balance at end of period at Sep. 30, 2013 $ 1,440,774 $ 212,082 $ (122) $ 1,282,667 $ (169,797) $ 101,949 $ 13,995