Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Effects of Prior Period Errors in Consolidated Balance Sheets (Detail)

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Basis of Presentation - Effects of Prior Period Errors in Consolidated Balance Sheets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Condensed Financial Statements, Captions [Line Items]        
Prepaid expenses and other current assets $ 145,624 $ 134,605    
Deferred income taxes 49,339 54,949    
Total current assets 984,047 785,685    
Total assets 1,724,143 1,463,075    
Income taxes payable 61,325 62,283    
Total current liabilities 762,362 579,557    
Deferred income taxes 62,982 70,390    
Total liabilities 1,328,660 914,931    
Retained earnings 123,096 293,887    
Total shareholders' equity 395,483 548,144 473,996 351,218
Total liabilities and shareholders' equity 1,724,143 1,463,075    
As Previously Reported [Member]
        
Condensed Financial Statements, Captions [Line Items]        
Prepaid expenses and other current assets 125,425 117,073    
Deferred income taxes 49,339 55,615    
Total current assets 963,848 768,819    
Total assets 1,703,944 1,446,209    
Income taxes payable 15,854 31,415    
Total current liabilities 716,891 548,689    
Deferred income taxes 62,982 72,348    
Total liabilities 1,283,189 886,021    
Retained earnings 148,368 305,931    
Total shareholders' equity 420,755 560,188 487,212 359,311
Total liabilities and shareholders' equity 1,703,944 1,446,209    
As Adjusted [Member]
        
Condensed Financial Statements, Captions [Line Items]        
Prepaid expenses and other current assets 145,624 134,605    
Deferred income taxes 49,339 54,949    
Total current assets 984,047 785,685    
Total assets 1,724,143 1,463,075    
Income taxes payable 61,325 62,283    
Total current liabilities 762,362 579,557    
Deferred income taxes 62,982 70,390    
Total liabilities 1,328,660 914,931    
Retained earnings 123,096 293,887    
Total shareholders' equity 395,483 548,144 473,996 351,218
Total liabilities and shareholders' equity $ 1,724,143 $ 1,463,075