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Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2020
Retirement Benefits [Abstract]  
Pension Plan and Post-Retirement Healthcare and Life Insurance Plans
The following table sets forth information regarding the pension plan and post-retirement healthcare and life insurance plans (in thousands):
 PensionPost-retirement
 202020192018202020192018
Change in benefit obligation:
Benefit obligation at beginning of year$33,058 28,878 31,970 23,323 20,028 22,757 
Service cost— — — 78 80 115 
Interest cost1,000 1,198 1,094 712 837 786 
Actuarial loss 381 63 — (169)— 18 
Benefits paid(1,630)(1,493)(1,401)(627)(600)(590)
Change in actuarial assumptions2,361 4,412 (2,785)(4,512)2,978 (3,058)
Benefit obligation at end of year$35,170 33,058 28,878 18,805 23,323 20,028 
Change in plan assets:
Fair value of plan assets at beginning of year$49,932 43,449 46,870 — — — 
Actual return on plan assets6,315 7,976 (2,020)— — — 
Employer contributions— — — 627 600 590 
Benefits paid(1,630)(1,493)(1,401)(627)(600)(590)
Fair value of plan assets at end of year54,617 49,932 43,449 — — — 
Funded status at end of year$19,447 16,874 14,571 (18,805)(23,323)(20,028)
Components of Accumulated Other Comprehensive Loss (Gain) related to Pension Plan and Other Post-retirement Benefits
The components of accumulated other comprehensive loss (gain) related to the pension plan and other post-retirement benefits, on a pre-tax basis, at December 31, 2020 and 2019 are summarized in the following table (in thousands):
 PensionPost-retirement
 2020201920202019
Unrecognized prior service cost$— — — — 
Unrecognized net actuarial loss (gain)9,026 10,346 (8,055)(3,621)
Total accumulated other comprehensive loss (gain)$9,026 10,346 (8,055)(3,621)
Net Periodic Benefit Cost (Increase)
Net periodic (benefit) increase cost for the years ending December 31, 2020, 2019 and 2018, included the following components (in thousands):
 PensionPost-retirement
 202020192018202020192018
Service cost$— — — 78 80 115 
Interest cost1,000 1,198 1,094 712 837 786 
Return on plan assets(2,949)(2,562)(2,769)— — — 
Amortization of:
Net loss (gain) 696 1,015 795 (248)(825)(396)
Unrecognized prior service cost— — — — — — 
Net periodic (benefit) increase cost$(1,253)(349)(880)542 92 505 
Weighted Average Actuarial Assumptions Used
The weighted average actuarial assumptions used in the plan determinations at December 31, 2020, 2019 and 2018 were as follows:
 PensionPost-retirement
 202020192018202020192018
Discount rate2.30 %3.10 %4.25 %2.30 %3.10 %4.25 %
Rate of compensation increase— — — — — — 
Expected return on plan assets6.00 6.00 6.00 — — — 
Medical and life insurance benefits cost rate of increase— — — 6.00 6.00 6.00 
Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rate A 1% change in the assumed health care cost trend rate would have had the following effects on post-retirement benefits at December 31, 2020 (in thousands):
1% increase1% decrease
Effect on total service cost and interest cost$140 110 
Effect on post-retirement benefits obligation$3,900 3,100 
Estimated Future Benefit Payments
Estimated future benefit payments, which reflect expected future service, as appropriate for the next five years, are as follows (in thousands):
PensionPost-retirement
2021$1,721 780 
20221,740 789 
20231,774 821 
20241,779 822 
20251,772 850 
Weighted-Average Asset Allocation of Pension Plan Assets
The weighted-average asset allocation of pension plan assets at December 31, 2020 and 2019 were as follows:
Asset Category20202019
Domestic equities39 %37 %
Foreign equities12 %11 %
Fixed income47 %50 %
Real estate%%
Cash— %— %
Total100 %100 %
Target Allocation of Assets and Acceptable Ranges The target allocation of assets and acceptable ranges around the targets are as follows:
Asset CategoryTargetAllowable Range
Domestic equities37 %
30-41%
Foreign equities11 %
5-13%
Fixed income50 %
40-65%
Real estate%
0-4%
Cash%
0%
Total100 %
Assets Measured at Fair Value on Recurring Basis
The following tables present the assets that are measured at fair value on a recurring basis by level within the U.S. GAAP fair value hierarchy as reported on the statements of net assets available for Plan benefits at December 31, 2020 and 2019, respectively. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
 Fair value measurements at December 31, 2020
(in thousands)Total(Level 1)(Level 2)(Level 3)
Group annuity contracts$64 — 64 — 
Mutual funds:
Fixed income25,418 25,418 — — 
International equity6,581 6,581 — — 
Large U.S. equity1,677 1,677 — — 
Small/Mid U.S. equity1,225 1,225 — — 
Total mutual funds34,901 34,901 — — 
Pooled separate accounts19,652 — 19,652 — 
Total Plan assets$54,617 34,901 19,716 — 

 Fair value measurements at December 31, 2019
(in thousands)Total(Level 1)(Level 2)(Level 3)
Group annuity contracts$81 — 81 — 
Mutual funds:
Fixed income16,609 16,609 — — 
International equity5,535 5,535 — — 
Large U.S. equity1,496 1,496 — — 
Small/Mid U.S. equity996 996 — — 
Total mutual funds24,636 24,636 — — 
Pooled separate accounts25,215 — 25,215 — 
Total Plan assets$49,932 24,636 25,296 — 
Status of Unvested Stock Awards
A summary status of the granted but unvested stock awards as of December 31, and changes during the year, is presented below:
 Restricted Stock Awards
 202020192018
Outstanding at beginning of year668,826 651,099 660,783 
Granted429,122 291,034 296,411 
Forfeited(59,938)(46,914)(56,296)
Vested(252,829)(226,393)(249,799)
Outstanding at the end of year785,181 668,826 651,099 
Status of Unexercised Stock Options
A summary of the status of the granted but unexercised stock options as of December 31, 2020, 2019 and 2018, and changes during the year is presented below:
 202020192018
 
Number
of
stock
options
Weighted
average
exercise
price
Number
of
stock
options
Weighted
average
exercise
price
Number
of
stock
options
Weighted
average
exercise
price
Outstanding at beginning of year499,201 $19.32 470,979 $18.36 507,656 $16.84 
Granted107,240 20.62 41,685 27.25 43,124 25.58 
Exercised— — (13,463)10.35 (79,801)12.61 
Forfeited(10,000)14.68 — — — — 
Expired— — — — — — 
Outstanding at the end of year596,441 $17.96 499,201 $19.32 470,979 $18.36 
Stock Options Outstanding
The following table summarizes information about stock options outstanding at December 31, 2020:
 Options OutstandingOptions Exercisable
Range of exercise prices
Number
of
options
outstanding
Average
remaining
contractual
life
Weighted
average
exercise
price
Number
of
options
exercisable
Weighted
average
exercise
price
$14.50-15.23
138,475 1.1$14.89 138,475 $14.89 
$16.38-27.25
457,966 6.1$20.83 279,901 $19.50 
Weighted Average Assumptions of Fair Value Option Grants
The fair value of the option grants was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:
 For the year ended December 31,
 202020192018
Expected dividend yield4.46 %3.38 %3.13 %
Expected volatility20.33 %22.01 %20.65 %
Risk-free interest rate0.75 %2.53 %2.65 %
Expected option life8 years8 years8 years