XML 63 R38.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stockholders' Equity - Summary of Stock Option Activity (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Number of Shares, Outstanding at December 31, 2013 1,734
Number of Shares, Granted 83
Number of Shares, Exercised (30)
Number of Shares, Forfeited (15)
Number of Shares, Outstanding at March 31, 2014 1,772
Number of Shares, Exercisable at March 31, 2014 790
Weighted - Average Exercise Price Per Share, Outstanding, Beginning balance $ 31.85
Weighted - Average Exercise Price Per Share, Granted $ 36.96
Weighted - Average Exercise Price Per Share, Exercised $ 27.58
Weighted - Average Exercise Price Per Share, Forfeited $ 33.65
Weighted - Average Exercise Price Per Share, Outstanding, Ending balance $ 32.14
Weighted - Average Exercise Price Per Share, Exercisable at March 31, 2014 $ 28.96
Weighted - Average Remaining Contractual Term, Outstanding at March 31, 2014 6 years 11 months 12 days
Weighted - Average Remaining Contractual Term, Exercisable at March 31, 2014 4 years 11 months 1 day
Aggregate Intrinsic Value, Outstanding at March 31, 2014 $ 7,076
Aggregate Intrinsic Value, Exercisable at March 31, 2014 $ 5,536