Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 187,164	$ 179,668
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	145,795	135,517
Amortization	15,657	14,476
Deferred income taxes	(6,702)	3,183
Gain on sales of plant and equipment	(1,338)	(828)
Stock-based compensation expense	20,833	19,965
Changes in assets and liabilities, excluding effects of business acquisitions:
Trade receivables, net	(12,812)	9,632
Inventories, net	(7,226)	8,424
Prepaid expenses and other current assets	(5,395)	6,913
Accounts payable, trade	6,513	(13,948)
Accrued expenses and other current liabilities	2,514	18,766
Other, net	(3,085)	(574)
Net cash provided by operating activities	341,918	381,194
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(220,872)	(168,483)
Proceeds from sales of plant and equipment	10,634	7,292
Business acquisitions and holdback settlements	(29,834)	(15,745)
Other, net	716	(1,869)
Net cash used in investing activities	(239,356)	(178,805)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in short-term debt	45,112	0
Proceeds from borrowings of long-term debt	306,254	4,666
Repayment of long-term debt	(403,757)	(119,863)
Financing costs	(2,398)	0
Purchase of treasury stock	0	(8,127)
Proceeds from the exercise of stock options	19,830	22,946
Stock issued for the Employee Stock Purchase Plan	8,994	8,797
Excess tax benefit realized from the exercise of stock options	5,091	6,568
Dividends paid to stockholders	(81,942)	(70,505)
Change in cash overdraft and other	(3,595)	(21,992)
Net cash used in financing activities	(106,411)	(177,510)
Change in cash	(3,849)	24,879
Cash – Beginning of period	69,561	86,386
Cash – End of period	$ 65,712	$ 111,265