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Stock and Incentive Compensation Plans (Tables)
6 Months Ended
Jun. 30, 2015
Stock and Incentive Compensation Plans [Abstract]  
Summary of stock and incentive plans' vesting periods and contractual terms
The following table summarizes the vesting periods for awards granted under the Plan (in years):

  
Vesting Period
 
Performance awards (includes acheivement shares for grants after 2013)
  
3
 
Achievement shares from performance grants prior to 2013
  
3
 
Time-vested awards
  
3
 
Summary of stock and incentive plan activity
The following tables summarize the stock and incentive plan activity for the periods presented:

  
Three Months Ended June 30, 2015
 
  
Performance
Awards
  
Time-Vested
Awards
 
Outstanding/Nonvested shares, beginning of period
  
212,309
   
318,333
 
Granted
  
-
   
500
 
Exercised or released from restriction
  
-
   
(1,299
)
Forfeited
  
-
   
(4,456
)
Outstanding/Nonvested shares, end of period
  
212,309
   
313,078
 

  
Six Months Ended June 30, 2015
 
  
Performance
Awards
  
Time-Vested
Awards
 
Outstanding/Nonvested shares, beginning of period
  
181,195
   
263,905
 
Granted
  
84,899
   
120,814
 
Exercised or released from restriction
  
(47,360
)
  
(64,508
)
Forfeited
  
(6,425
)
  
(7,133
)
Outstanding/Nonvested shares, end of period
  
212,309
   
313,078
 
Compensation expense for stock and incentive plans
The following table presents information regarding compensation expense for awards under the Plan for the periods presented ($ in thousands):

  
Three Months Ended June 30,
  
Six Months Ended June 30,
 
  
2015
  
2014
  
2015
  
2014
 
Performance awards
 
$
318
  
$
267
  
$
564
  
$
530
 
Time-vested awards
  
612
   
777
   
1,217
   
1,705
 
Total compensation expense
 
$
930
  
$
1,044
  
$
1,781
  
$
2,235