XML 41 R29.htm IDEA: XBRL DOCUMENT v3.7.0.1
COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS (Tables)
6 Months Ended
Jun. 30, 2017
Retirement Benefits [Abstract]  
Components of net periodic benefit costs
The components of net periodic expense for the Corporation’s pension and other benefit plans for the periods indicated are as follows (in thousands):
 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
 
2017
 
2016
 
2017
 
2016
Qualified Pension Plan
 
 
 
 
 
 
 
 
Service cost, benefits earned during the period
 
$

 
$
298

 
$

 
$
594

Interest cost on projected benefit obligation
 
403

 
470

 
806

 
940

Expected return on plan assets
 
(785
)
 
(756
)
 
(1,570
)
 
(1,511
)
Amortization of unrecognized transition obligation
 

 

 

 

Amortization of unrecognized prior service cost
 

 
2

 

 
4

Amortization of unrecognized net loss
 
58

 
383

 
116

 
767

Net periodic pension cost (benefit)
 
$
(324
)
 
$
397

 
$
(648
)
 
$
794

 
 
 
 
 
 
 
 
 
Supplemental Pension Plan
 
 

 
 

 
 

 
 

Service cost, benefits earned during the period
 
$

 
$
10

 
$

 
$
21

Interest cost on projected benefit obligation
 
12

 
13

 
24

 
26

Expected return on plan assets
 

 

 

 

Amortization of unrecognized prior service cost
 

 

 

 

Amortization of unrecognized net loss
 
1

 
7

 
2

 
13

Net periodic supplemental pension cost
 
$
13

 
$
30

 
$
26

 
$
60

 
 
 
 
 
 
 
 
 
Postretirement Plan, Medical and Life
 
 

 
 

 
 

 
 

Service cost, benefits earned during the period
 
$

 
$
12

 
$

 
$
24

Interest cost on projected benefit obligation
 
4

 
18

 
8

 
35

Expected return on plan assets
 

 

 

 

Amortization of unrecognized prior service cost
 
(55
)
 
(25
)
 
(110
)
 
(49
)
Amortization of unrecognized net loss
 
29

 
6

 
58

 
12

Net periodic postretirement, medical and life cost (benefit)
 
$
(22
)
 
$
11

 
$
(44
)
 
$
22