XML 155 R88.htm IDEA: XBRL DOCUMENT v2.4.0.8
Share Capital - Additional Information (Detail) (USD $)
 12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Employee Stock Option
Dec. 31, 2012
Employee Stock Option
Dec. 31, 2011
Employee Stock Option
Dec. 31, 2013
Restricted Stock Units (RSUs)
Dec. 31, 2011
Restricted Stock Units (RSUs)
Oct. 27, 2011
Maximum
Nov. 22, 2011
Plan 1
Nov. 22, 2011
Plan 1
Maximum
Nov. 22, 2011
Plan 2
Nov. 22, 2011
Plan 2
Maximum
Feb. 21, 2012
Plan 3
Feb. 21, 2012
Plan 3
Maximum
Apr. 27, 2012
Plan 4
Apr. 27, 2012
Plan 4
Maximum
Jul. 30, 2012
Plan 5
Jul. 30, 2012
Plan 5
Maximum
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]                                      
Share allotment description Every holder of an ordinary share present in person or proxy at a general meeting of shareholders shall have one vote, for each ordinary share held with no individual having more than one vote.                                    
Options exercised by employees       1,249,759 890,236 430,340                          
Average exercise price of Option per share       $ 21.60 $ 14.62 $ 10.84                          
Total proceeds from exercise of stock options by employees       $ 27,000,000 $ 13,000,000 $ 4,700,000                          
Ordinary shares issued in respect of certain RSU's previously awarded by the Company             50,000 3,768                      
Share repurchase program value                 50,000,000   10,000,000   10,000,000   20,000,000   20,000,000   10,000,000
Share repurchase plans, start date                   Nov. 23, 2011   Jan. 01, 2012   Feb. 22, 2012   Apr. 27, 2012   Jul. 30, 2012  
Share repurchase plans, end date                   Dec. 31, 2011   Feb. 20, 2012   Apr. 22, 2012   Jul. 18, 2012   Oct. 26, 2012  
Ordinary shares repurchased    738,341 545,597                                
Ordinary shares repurchased, value    15,605,000 9,005,000                                
Total ordinary shares repurchased   1,283,938                                  
Total ordinary shares repurchased, value   $ 24,600,000