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Incentive and Deferred Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2017
Compensation Related Costs [Abstract]  
Schedule of deferred executive and outside directors' compensation liability
The following summarizes our deferred executive and outside directors' compensation liability for December 31:
(in thousands)
 
 
 
 
2017
 
2016
 
2015
 
 
 

 
 

 
 

Annual incentive plan awards
 
$
6,118

 
$
6,460

 
$
7,057

Long-term incentive plan awards
 
10,931

 
11,321

 
14,228

Employer match and hypothetical earnings on deferred compensation
 
2,664

 
1,164

 
2,042

Total plan awards and earnings
 
19,713

 
18,945

 
23,327

Total plan awards paid
 
(20,621
)
 
(20,418
)
 
(14,317
)
Compensation deferred
 
680

 
1,214

 
996

Distributions from the deferred compensation plans
 
(853
)
 
(435
)
 
(1,688
)
Forfeitures (1)
 
(593
)
 
(3,117
)
 
(821
)
Funding of rabbi trust
 
(1,177
)
 
(738
)
 
(9,018
)
Incentive plan and deferred compensation liabilities at end of period
 
$
30,057

 
$
32,908

 
$
37,457


(1)    Forfeitures are the result of plan participants who separated from service with the Company.