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Nonqualified Benefit Plans Components of NPBC (Details 11) - Unfunded Plan - Nonqualified Plan - Supplemental Employee Retirement Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 58
Interest cost	2,142	1,912	2,606
Recognized net actuarial loss	950	1,164	1,192
Net periodic benefit cost	$ 3,092	$ 3,076	$ 3,856

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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