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401(k) Profit Sharing, Deferred Compensation and Long-term Incentive Plans (Tables)
12 Months Ended
Dec. 31, 2017
Postemployment Benefits [Abstract]  
Schedule of Long-term Incentive Plan
The following is a summary related to our LTIP (in thousands):
Year Ended December 31,
 
2017
 
2016
 
2015
Compensation expense
 
$
1,059

 
$
1,081

 
$
1,812

Total discretionary contribution
 
$
1,730

 
$
1,785

 
$
2,249

Guaranteed annual return
 
5.00
%
 
5.25
%
 
5.25
%