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Employee Benefit Plans - Changes Recognized in OCI (Details) - Defined benefit plans - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Actuarial gain/(loss)		$ (5,296)	$ (5,478)	$ (7,765)
Prior service cost		0	0	(424)
Amortization of actuarial loss and prior service cost		(4,672)	(2,622)	(3,527)
Reclassification of actuarial loss related to settlement	$ 11,700	0	0	11,713
Total		$ (624)	$ (2,856)	$ 7,051

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- Definition

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

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Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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