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Retirement Benefit Plans
 6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Retirement Benefit Plans RETIREMENT BENEFIT PLANS (Dollars in Thousands)
Arrow sponsors qualified and non-qualified defined benefit pension plans and other postretirement benefit plans for its employees. Arrow maintains a non-contributory pension plan, which covers substantially all employees.  Effective December 1, 2002, all active participants in the qualified defined benefit pension plan were given a one-time irrevocable election to continue participating in the traditional plan design, for which benefits were based on years of service and the participant’s final compensation (as defined), or to begin participating in the new cash balance plan design.  All employees who participate in the plan after December 1, 2002 automatically participate in the cash balance plan design.  The interest credits under the cash balance plan are based on the 30-year U.S. Treasury rate in effect for November of the prior year with a minimum interest credit of 3%.  The service credits under the cash balance plan are equal to 6.0% of eligible salaries for employees who become participants on or after January 1, 2003.  For employees in the plan prior to January 1, 2003, the service credits are scaled based on the age of the participant, and range from 6.0% to 12.0%.  The funding policy is to contribute up to the maximum amount that can be deducted for federal income tax purposes and to make all payments required under The Employee Retirement Income Security Act (ERISA).  Arrow also maintains a supplemental non-qualified unfunded retirement plan to provide eligible employees of Arrow and its subsidiaries with benefits in excess of qualified plan limits imposed by federal tax law.

Arrow has multiple non-pension postretirement benefit plans.  The health care, dental and life insurance plans are contributory, with participants’ contributions adjusted annually.  Arrow’s policy is to fund the cost of postretirement benefits based on the current cost of the underlying policies.  However, the health care plan provision for automatic increases of Company contributions each year is based on the increase in inflation and is limited to a maximum of 5%.  

As of December 31, 2019, Arrow updated its mortality assumption to the Pri-2012 mortality tables for employees, healthy annuitants and contingent survivors, adjusted for mortality improvements with the Scale MP-2019 mortality improvement scale on a generational basis to reflect newly published mortality tables. The Pension Plan uses the sex-distinct amount-weighted tables, the Select Executive Retirement Plan uses the sex-distinct white collar amount-weighted tables, and the Postretirement Benefit Plan uses the sex-distinct headcount-weighted tables. The change in mortality tables resulted in a decrease in liabilities for the Employee's Pension Plan, the Select Executive Retirement Plan and the Postretirement Benefit Plan.

The mortality table used in determining the present value of a lump sum payment/annuitizing cash balance accounts was changed to the applicable mortality table for the determination of present values under Internal Revenue Code (IRC) Section 417(e)(3)(B). This table is currently a 50/50 blend of male and female rates from the 2020 sex distinct optional combined mortality tables, as prescribed under IRC Section 430. The change in mortality table was made to reflect the continued improvement in mortality rates and resulted in an increase in liabilities for the Employee's Pension Plan and the Select Executive Retirement Plan.

The interest rates used in determining the present value of a lump sum payment/annuitizing cash balance accounts were changed to the segment rates in effect for the January 1, 2020 plan year (2.04%, 3.09%, 3.68%) as of December 31, 2019. This change resulted in a decrease in liability for the Employees' Pension Plan and the Select Executive Retirement Plan.

The following tables provide the components of net periodic benefit costs for the three and six month periods ended June 30, 2020 and 2019.
Employees'Select ExecutivePostretirement
PensionRetirementBenefit
PlanPlanPlans
Net Periodic Benefit Cost
For the Three Months Ended June 30, 2020
Service Cost 1
$401  $101  $29  
Interest Cost 2
355  42  77  
Expected Return on Plan Assets 2
(900) —  —  
Amortization of Prior Service Cost 2
16  10  26  
Amortization of Net Loss (Gain) 2
40  40  (2) 
Net Periodic Cost$(88) $193  $130  
Plan Contributions During the Period$—  $116  $59  
For the Three Months Ended June 30, 2019:
Service Cost 1
$365  $65  $31  
Interest Cost 2
343  56  93  
Expected Return on Plan Assets 2
(761) —  —  
Amortization of Prior Service Cost 2
18  13  26  
Amortization of Net Loss (Gain) 2
154  30  (5) 
Net Periodic Cost$119  $164  $145  
Plan Contributions During the Period$—  $117  $54  
Net Periodic Benefit Cost
For the Six Months Ended June 30, 2020:
Service Cost 1
$831  $204  $62  
Interest Cost 2
772  96  155  
Expected Return on Plan Assets 2
(1,804) —  —  
Amortization of Prior Service Cost 2
32  21  53  
Amortization of Net Loss 2
41  73  —  
Net Periodic (Benefit) Cost$(128) $394  $270  
Plan Contributions During the Period$—  $233  $137  
Estimated Future Contributions in the Current Fiscal Year$—  $—  $—  
For the Six Months Ended June 30, 2019:
Service Cost 1
$764  $162  $61  
Interest Cost 2
740  108  182  
Expected Return on Plan Assets 2
(1,531) —  —  
Amortization of Prior Service Cost 2
35  27  51  
Amortization of Net Loss (Benefit) 2
307  57  (22) 
Net Periodic Cost$315  $354  $272  
Plan Contributions During the Period$—  $233  $91  
Footnotes:
1. Included in Salaries and Employee Benefits on the Consolidated Statements of Income
2. Included in Other Operating Expense on the Consolidated Statements of Income
A contribution to the qualified pension plan in 2020 was not required, and currently, additional contributions in 2020 are not expected. Arrow makes contributions to its other post-retirement benefit plans in an amount equal to benefit payments for the year.