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Pension Plans and Postretirement Benefit Plan
 6 Months Ended
Jun. 30, 2019
Retirement Benefits [Abstract]  
Pension Plans and Postretirement Benefit Plan Pension Plans and Postretirement Benefit Plan
Components of net periodic benefit cost for the Company’s pension plans and the postretirement benefit plan are presented in the following table for the three and six months ended June 30, 2019 and 2018.
 
Pension Benefits
 
Postretirement Benefits
(dollars in thousands)
2019

 
2018

 
2019

 
2018

Three Months Ended June 30,
 

 
 

 
 

 
 

Service Cost
$
—

 
$
—

 
$
117

 
$
115

Interest Cost
1,093

 
1,041

 
257

 
236

Expected Return on Plan Assets
(1,249
)
 
(1,282
)
 
—

 
—

Amortization of:
 

 
 

 
 

 
 

Prior Service Credit
—

 
—

 
(72
)
 
(142
)
Net Actuarial Losses (Gains)
484

 
498

 
(78
)
 
(62
)
Net Periodic Benefit Cost
$
328

 
$
257

 
$
224

 
$
147

 
 
 
 
 
 
 
 
Six Months Ended June 30,
 

 
 

 
 

 
 

Service Cost
$
—

 
$
—

 
$
235

 
$
230

Interest Cost
2,187

 
2,082

 
515

 
471

Expected Return on Plan Assets
(2,498
)
 
(2,564
)
 
—

 
—

Amortization of:
 

 
 

 
 

 
 

Prior Service Credit
—

 
—

 
(144
)
 
(284
)
Net Actuarial Losses (Gains)
968

 
996

 
(156
)
 
(124
)
Net Periodic Benefit Cost
$
657

 
$
514

 
$
450

 
$
293



The service cost component of net periodic benefit cost are included in salaries and benefits and all other components of net periodic benefit cost are included in other noninterest expense in the consolidated statements of income for the Company’s pension plans and postretirement benefit plan. For the three and six months ended June 30, 2019, the Company contributed $0.1 million and $0.2 million, respectively, to the pension plans and $0.3 million and $0.6 million, respectively, to the postretirement benefit plan.  The Company expects to contribute a total of $0.5 million to the pension plans and $0.9 million to the postretirement benefit plan for the year ending December 31, 2019.