Consolidated Statement Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 224,849	$ 187,195
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	182,224	166,610
Amortization	18,841	18,643
Impairment	2,500	0
Deferred income taxes	37,750	45,198
(Gain) loss on sales of plant and equipment	(65)	890
Stock-based compensation expense	21,352	19,535
Losses on the extinguishment of debt	0	4,162
Changes in assets and liabilities, excluding effects of business acquisitions:
Securitization of trade receivables	0	(295,000)
Trade receivables, net	(37,360)	(13,974)
Inventories, net	(27,059)	(24,978)
Prepaid expenses and other current assets	(10,908)	(4,238)
Accounts payable, trade	9,801	39,161
Accrued expenses and other current liabilities	(62,329)	28,289
Other non-current assets	2,059	1,385
Other non-current liabilities	(1,002)	(6,131)
Net cash provided by operating activities	341,051	88,425
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(263,398)	(180,522)
Proceeds from sales of plant and equipment	12,199	10,629
Business acquisitions and holdback settlements	(96,970)	(20,695)
Other, net	(1,473)	(1,072)
Net cash used in investing activities	(349,642)	(191,660)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in short-term debt	406,701	0
Proceeds from borrowings of long-term debt	1,065,560	882,341
Repayment of long-term debt	(1,147,735)	(774,729)
Financing costs	(4,567)	(8,439)
Premium paid on redemption of senior subordinated notes	0	(3,175)
Purchase of treasury stock	(300,000)	0
Proceeds from the exercise of stock options	22,890	17,999
Stock issued for the Employee Stock Purchase Plan	11,361	11,015
Tax benefit realized from the exercise of stock options	10,914	6,373
Dividends paid to stockholders	(70,819)	(60,340)
Change in cash overdraft	2,858	20,204
Net cash provided by financing activities	(2,837)	91,249
Change in cash	(11,428)	(11,986)
Cash - Beginning of period	57,218	47,001
Cash - End of period	$ 45,790	$ 35,015