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Consolidated Statements of Comprehensive Earnings (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net Earnings	$ 60,237	$ 29,819	$ 105,581	$ 67,581
Change in Funded Status of Defined Benefit Plans:
Amortization of Net Actuarial Loss	500	508	1,000	1,016
Tax Expense	(188)	(188)	(376)	(376)
Comprehensive Earnings	$ 60,549	$ 30,139	$ 106,205	$ 68,221

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- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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