XML 13 R37.htm IDEA: XBRL DOCUMENT v2.4.0.6
Summary of RSU Activity (Detail) (Restricted Stock Units (RSUs), USD $)
3 Months Ended
Mar. 31, 2013
Restricted Stock Units (RSUs)
 
Options Outstanding Number of Shares  
Outstanding at beginning of period 496,000
Granted 18,450
Ordinary shares issued   
Forfeited   
Outstanding at ending of period 514,450
Weighted Average Fair Value  
Outstanding at beginning of period $ 20.26
Granted $ 31.49
Ordinary shares issued   
Forfeited   
Outstanding at end of period $ 20.66
Weighted Average Remaining Contractual Life  
Outstanding at end of period 1 year 9 months 4 days