Annual report pursuant to Section 13 and 15(d)

Stock-Based Awards (Summary Of Status Of Outstanding Stock Options And SARs) (Details)

v3.3.1.900
Stock-Based Awards (Summary Of Status Of Outstanding Stock Options And SARs) (Details) - Stock Options And Stock Appreciation Rights [Member]
 12 Months Ended
Dec. 31, 2015
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Outstanding, beginning balance (in shares) 2,296,680
Granted (in shares) 508,420
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 343,485
Exercised (in shares) (1,239,846)
Forfeited (in shares) (96,242)
Expired (in shares) (1,524)
Outstanding, ending balance (in shares) 1,810,973
Vested and expected to vest (in shares) 1,721,799
Exercisable at December (in shares) 979,546
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Outstanding at January 1, weighted average exercise price (in usd per share) | $ / shares $ 40.54
Granted, weighted average exercise price (in usd per share) | $ / shares 65.24
Exercised, weighted average exercise price (in usd per share) | $ / shares 30.58
Forfeited, weighted average exercise price (in usd per share) | $ / shares 55.77
Expired, weighted average exercise price (in usd per share) | $ / shares 13.29
Outstanding at December 31, weighted average exercise price (in usd per share) | $ / shares 45.80
Vested and expected to vest at December 31, weighted average exercise price (in usd per share) | $ / shares 45.07
Exercisable at December 31, weighted average exercise price (in usd per share) | $ / shares $ 35.53
Outstanding at December 31, Weighted Average Remaining Contractual Term 6 years 5 months
Vested and expected to vest at December 31, Weighted Average Remaining Contractual Term 6 years 4 months
Exercisable at December 31, Weighted Average Remaining Contractual Term 4 years 7 months
Outstanding at December 31, Aggregate Intrinsic Value | $ $ 15,771,007
Vested and expected to vest at December 31, Aggregate Intrinsic Value | $ 15,694,922
Exercisable at December 31, Aggregate Intrinsic Value | $ $ 14,990,911