v2.4.0.8
Stock Plans (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Summary of Stock Option and RSA Activity  
Beginning Balance, Shares 31,861
Granted, shares 463
Exercised, shares (13,672)
Forfeited, shares (22)
Expired, shares (15)
Ending Balance, Shares 18,615
Beginning balance, weighted average exercise price $ 43.62
Granted, weighted average exercise price $ 61.76
Exercised, weighted average exercise price $ 42.39
Forfeitures, weighted average exercise price $ 39.25
Expired, weighted average exercise price $ 45.61
Ending balance, weighted average exercise price $ 44.98
Options vested and expected to vest, shares 18,600
Options vested and expected to vest, Weighted Average Exercise Price $ 44.98
Options exercisable, shares 16,842
Options exercisable, Weighted Average Exercise Price $ 44.51
Beginning balance, shares 11,800
Granted, shares 3,867
Vested, shares (5,559)
Forfeited, shares (530)
Ending balance, shares 9,578
Beginning Balance, Weighted Average Grant Price $ 40.31
Granted, Weighted Average Grant Price $ 60.13
Vested, Weighted Average Grant Price $ 33.24
Forfeited, Weighted Average Grant Price $ 50.31
Ending Balance, Weighted Average Grant Price $ 51.88