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Note 8 - Retirement Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Service Cost	$ 2,442	$ 1,981	$ 4,885	$ 3,963
Interest Cost	2,243	1,985	4,486	3,971
Expected Return on Plan Assets	(3,596)	(3,482)	(7,192)	(6,967)
Amortization of Prior Service Cost	30	0	60	0
Amortization of Net Gain	303	30	605	60
Net Periodic Benefit Cost	$ 1,422	$ 514	$ 2,844	$ 1,027

X

- Definition

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

+ References

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- Definition

Amount of transition asset (obligation) recognized in net periodic benefit (cost) credit of defined benefit plan.

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- Definition

Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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