XML 51 R41.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation (Summary of Restricted Share Activity) (Details) - $ / shares
3 Months Ended 9 Months Ended
Mar. 31, 2017
Sep. 30, 2017
Performance Shares    
Number of Shares    
Vested (in shares) (55,000)  
Time-Based | Restricted Stock    
Number of Shares    
Outstanding - beginning of years (in shares) 216,916 216,916
Granted (in shares)   104,670
Vested (in shares)   (89,404)
Canceled or expired (in shares)   (2,000)
Outstanding - end of periods (in shares)   340,182
Weighted Average Grant Date Fair Value    
Outstanding - beginning of year (in dollars per share) $ 36.94 $ 36.94
Granted (in dollars per share)   38.41
Vested (in dollars per share)   44.39
Canceled or expired (in dollars per share)   37.87
Outstanding - end of year (in dollars per share)   $ 34.73
Vesting period   2 years
Time-Based | Restricted Stock and Performance Shares    
Number of Shares    
Performance- to time-based (in shares)   110,000
Weighted Average Grant Date Fair Value    
Performance- to time-based (in dollars per share)   $ 34.78
Performance-Based | Restricted Stock    
Number of Shares    
Outstanding - beginning of years (in shares) 165,000 165,000
Granted (in shares)   165,000
Vested (in shares)   (55,000)
Performance- to time-based (in shares)   110,000
Canceled or expired (in shares)   0
Outstanding - end of periods (in shares)   165,000
Weighted Average Grant Date Fair Value    
Outstanding - beginning of year (in dollars per share) $ 34.78 $ 34.78
Granted (in dollars per share)   38.10
Vested (in dollars per share)   34.78
Canceled or expired (in dollars per share)   0.00
Outstanding - end of year (in dollars per share)   $ 38.10
Performance-Based | Performance Shares and Service Time Shares    
Number of Shares    
Performance- to time-based (in shares)   (110,000)
Weighted Average Grant Date Fair Value    
Performance- to time-based (in dollars per share)   $ 34.78