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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Stock awards excluded from the calculation of diluted EPS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Year ended December 31,

 

 

2015

 

2014

 

2013

Stock awards subject to performance conditions

 

 

 266 

 

 

 385 

 

 

 381 

Stock awards that were antidilutive

 

 

 289 

 

 

 232 

 

 

 393 

Total stock awards excluded from diluted earnings per share

 

 

 555 

 

 

 617 

 

 

 774 

 

Earnings Per Share

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Year ended December 31,

 

 

2015

 

2014

 

2013

Net income

 

$

 475,602 

 

$

 445,374 

 

$

 327,438 

Shares:

 

 

 

 

 

 

 

 

 

Weighted average number of common shares outstanding

 

 

 31,092 

 

 

 31,038 

 

 

 30,957 

Dilutive stock awards

 

 

 402 

 

 

 474 

 

 

 324 

Diluted weighted average number of common shares outstanding

 

 

 31,494 

 

 

 31,512 

 

 

 31,281 

Basic earnings per share

 

$

 15.30 

 

$

 14.35 

 

$

 10.58 

Diluted earnings per share

 

$

 15.10 

 

$

 14.13 

 

$

 10.47