XML 27 R62.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stockholders' Equity - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Sep. 30, 2012
Aug. 01, 2007
Maximum
Sep. 30, 2012
Employees
Sep. 30, 2012
Stock Repurchase Plan
Jun. 30, 2012
Stock Repurchase Plan
Jul. 25, 2012
Subsequent Event
Maximum
Oct. 24, 2012
Dividend Declared
Subsequent Event
Stockholders Equity Note [Line Items]                          
Dividend declaration date                         Oct. 24, 2012
Dividend per share, declared                         $ 0.05
Dividend payment date Sep. 28, 2012 Jun. 29, 2012 Mar. 30, 2012 Sep. 30, 2011 Jun. 30, 2011 Mar. 30, 2011             Dec. 28, 2012
Dividend record date                         Dec. 14, 2012
Amount approved for repurchases under stock buyback program               $ 250,000,000       $ 150,000,000  
Treasury stock shares acquired, Shares                   2,400,000 4,700,000    
Treasury stock shares acquired, Value                   38,800,000 70,100,000    
Treasury stock shares acquired                 83,229        
Purchase price for treasury stock acquired             $ 110,186,000   $ 1,200,000