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Components of Net Periodic (Benefit) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Compensation And Retirement Disclosure [Abstract]
Service Cost - Benefits Earned During the Period		$ 85
Interest Cost of Projected Benefit Obligation	$ 304	338
Expected Return on Plan Assets	(355)	(426)
Recognized Net Actuarial Loss	33	43
Net Periodic Pension (Benefit) Cost	$ (18)	$ 40

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