XML 54 R41.htm IDEA: XBRL DOCUMENT v3.8.0.1
Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2017
Shareholders' Equity [Abstract]  
Changes in restricted stock units
Changes in restricted stock units during the year ended December 31, 2017 are as follows:

  
2017
  
Weighted Average
Grant Date
 Fair Value
 
Unvested restricted stock units, beginning of year
  
112
  
$
41.48
 
Units granted
  
83
   
65.20
 
Units forfeited
  
(3
)
  
53.11
 
Units vested
  
(31
)
  
43.51
 
Unvested restricted stock units, end of year
  
161
   
53.09