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Employee Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2019
Postemployment Benefits [Abstract]  
Summary of Change in Projected Benefit Obligation
The following tables summarize the SERP as of and for the year ended December 31, 2019:
 
Change in Projected Benefit Obligation
     
Benefit obligation at beginning of year
  $9,038,825 
Interest cost
   340,302 
Actuarial (gain) loss
   712,728 
Benefits paid
   (367,989
   
 
 
 
Benefit obligation at end of year
  $9,723,866 
The following tables summarize the Pension Plan and SERP as of and for the year ended December 31, 2018:
 
   
Pension Plan
   
SERP
 
Change in Projected Benefit Obligation
          
Benefit obligation at beginning of year
  $52,197,520   $9,616,702 
Interest cost
   28,282    319,143 
Actuarial (gain) loss
   77,121    (540,666
Settlements
   (52,057,333   —   
Benefits paid
   (245,590   (356,354
   
 
 
   
 
 
 
Benefit obligation at end of year
  $—     $9,038,825 
   
 
 
   
 
 
 
Summary of Change in Plan Assets
Change in Plan Assets
     
Fair value of plan assets at beginning of year
  $—   
Employer contribution
   367,989 
Benefits paid
   (367,989
   
 
 
 
Fair value of plan assets at end of year
  $—   
   
 
 
 
Funded status
  $(9,723,866
Unrecognized net actuarial (gain) loss
   593,326 
   
 
 
 
Cumulative employer contributions in excess of the net periodic pension cost
  $(9,130,540
   
 
 
 
 
   
Pension Plan
   
SERP
 
Change in Plan Assets
          
Fair value of plan assets at beginning of year
  $52,203,372   $—   
Actual return on plan assets
   (113,981   —   
Employer contribution
   213,532    356,354 
Settlements
   (52,057,333   —   
Benefits paid
   (245,590   (356,354
   
 
 
   
 
 
 
Fair value of plan assets at end of year
  $—     $—   
Funded status
  $—     $(9,038,825
Unrecognized net actuarial (gain) loss
   —      (119,402
Cumulative employer contributions in excess of the net periodic pension cost
  $—     $(9,158,227
Summary of Amounts Recognized in Statement of Financial Position
Amounts Recognized in the Statement of Financial Position
 
Current liabilities
   (493,735
Noncurrent liabilities
   (9,230,131
   
 
 
 
Net amount recognized
  $(9,723,866
   
Pension Plan
   
SERP
 
Amounts Recognized in the Statement of Financial Position
 
     
Current liabilities
  $—      (512,786
Noncurrent liabilities
   —      (8,526,039
Net amount recognized
  $—     $(9,038,825
Summary of Amounts Recognized in Accumulated Other Comprehensive Income
Amounts Recognized in Accumulated Other Comprehensive Income
 
Net actuarial loss (gain)
  $593,326 
Total (before tax effects)
  $593,326 
   
Pension Plan
  
SERP
 
Amounts Recognized in Accumulated Other Comprehensive Income
     
Net actuarial loss (gain)
  $—    $(119,402
Total (before tax effects)
  $—    $(119,402
Summary of Information for Pension Plans With Accumulated Benefit Obligation in Excess of Plan Assets
Information for Pension Plans about Benefit Obligation and Plan Assets
 
Projected benefit obligation
  $9,723,866 
Accumulated benefit obligation
  $9,723,866 
   
Pension Plan
   
SERP
 
Information for Pension Plans with an Accumulated Benefit Obligation in excess of Plan Assets
 
 
 
 
 
 
 
 
Projected benefit obligation
  $—     $9,038,825 
Accumulated benefit obligation
  $—     $9,038,825 
Summary of Weighted-Average Assumptions for Disclosure
Weighted-average assumptions for Disclosure
     
Discount rate
   2.95
Mortality table
   
Pri-2012
 
Mortality improvement scale
   
MP-2019
 
   
Pension Plan
  
 
 
 
SERP
 
 
 
 
Weighted-average assumptions for Disclosure
         
Discount rate
   N/A   4.00
Summary of Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income
Net periodic benefit cost
     
Interest cost
  $340,302 
   
 
 
 
Net periodic benefit cost
  $340,302 
   
Pension Plan
  
SERP
 
Net periodic benefit cost
         
Interest cost
  $28,282  $319,143 
Recognized actuarial (gain) loss due to settlements
   (801,622  —   
Net periodic benefit cost
  $(773,340 $319,143 
Summary of Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
 
Net actuarial (gain) loss
  $712,728 
   
 
 
 
Total recognized in other comprehensive income (before tax effects)
  $712,728 
Total recognized in net cost and other comprehensive income (before tax effects)
  $1,053,030 
   
Pension Plan
  
SERP
 
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
 
Net actuarial (gain) loss
  $191,102  $(540,666)
Recognized actuarial (gain) loss due to settlements
   801,622   —   
Total recognized in other comprehensive income (before tax effects)
  $992,724  $(540,666)
Total recognized in net benefit cost and other comprehensive income (before tax effects)
  $219,384  $(221,523)
Summary of Amounts Expected to be Recognized in Net Periodic Cost in Coming Year
Amounts Expected to be Recognized in Net Periodic Cost in the Coming Year
 
(Gain) loss recognition
  $—   
Prior service cost recognition
  $—   
Net initial obligation (asset) recognition
  $—   
   
Pension Plan
  
SERP
 
Amounts Expected to be Recognized in Net Periodic Cost in the Coming Year
 
    
(Gain) loss recognition
   N/A  $—   
Prior service cost recognition
   N/A  $—   
Net initial obligation (asset) recognition
   N/A  $—   
Summary of Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Weighted-average assumptions used to determine Net Periodic Benefit Cost
 
Discount rate
   4.00%
Corridor
   10.00%
Average future working lifetime
   6.46 
Mortality table
   
RP-2014
 
Mortality improvement scale
   
MP-2018
 
   
Pension Plan
  
SERP
 
Weighted-average assumptions used to determine Net Periodic Benefit Cost
 
Discount rate
   1.80  3.35
Expected return on plan assets
   0.00  N/A 
Corridor
   10.00  10.00
Summary of Estimated Future Benefit Payments
Estimated Future Benefit Payments
     
2020
  $493,735 
2021
  $526,686 
2022
  $525,699 
2023
  $536,247 
2024
  $558,823 
2025-2029
  $2,871,799 
 
 
 
 
 
Summary of Estimated Contributions
Contributions
     
Estimated contributions for 2020
  $493,735