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Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2022
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The net periodic pension cost for the Corporation's Pension Plan consisted of the following components:
Three months ended June 30Six months ended June 30
 2022202120222021
         (in thousands)
Interest cost$598 $561 $1,196 $1,122 
Expected return on plan assets(1,099)(1,011)(2,197)(2,022)
Net amortization and deferral164 504 327 1,008 
Net periodic pension cost$(337)$54 $(674)$108 

The components of the net benefit for the Corporation's Postretirement Plan consisted of the following components:
Three months ended June 30Six months ended June 30
 2022202120222021
         (in thousands)
Interest cost$9 $$17 $16 
Net accretion and deferral(131)(134)(262)(268)
Net periodic benefit$(122)$(126)$(245)$(252)