Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Net earnings	$ 164,958	$ 143,967	$ 113,426
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	50,502	50,360	44,393
Write-off of assets related to restructuring activities	3,689
Derivatives not designated in hedging relationships:
Net (gains) losses	(2,496)	1,083
Cash settlements	(851)	(3,763)
Provision for doubtful accounts	998	1,395	1,513
Deferred income taxes	1,673	(3,227)	(3,064)
Non-cash interest expense	8,492	7,983	7,776
Stock-based compensation	14,737	11,585	9,056
Write-off of deferred financing fees			2,308
Loss (gain) on disposal of fixed assets	170	(432)
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	5,421	7,106	(61,892)
Inventory	(921)	(19,655)	(67,250)
Prepaid and other current assets	(15,754)	8,834	(15,658)
Other assets	3,293	(955)	(2,552)
Accounts payable	5,370	(12,377)	42,422
Accrued expenses	2,997	13,505	(3,822)
Other liabilities	2,122	(1,213)	9,803
Net cash provided by operating activities	244,400	204,196	76,459
Cash flows from investing activities
Capital expenditures	(55,286)	(48,943)	(59,940)
Purchase of businesses, net of cash acquired		(23,553)	(32,200)
Proceeds from disposal of property, plant, and equipment	194	76	479
Net cash used in investing activities	(55,092)	(72,420)	(91,661)
Cash flows from financing activities
Net increase (decrease) in short-term debt	7,435	(462)	3,084
Proceeds from revolving credit borrowings	246,050	111,550	100,000
Repayment of revolving credit borrowings	(325,450)	(132,150)
Proceeds from long-term debt-other	5,556		6,112
Payments of long-term debt-other	(16,468)	(308)	(212,238)
Deferred financing fees incurred in connection with refinancing prior credit facility			(3,500)
Capital lease obligations and other	(358)	(1,375)	(111)
Net effect from exercising of stock options and vesting of equity awards	10,033	974	17,894
Excess tax benefits from exercise of stock options and vesting of equity awards	1,351	1,772	6,082
Purchase of treasury stock	(22,593)	(58,383)
Purchase of noncontrolling interests	(2,131)	(1,000)
Proceeds from noncontrolling interests	613
Net cash used in financing activities	(95,962)	(79,382)	(82,677)
Effect of exchange rate changes on cash and cash equivalents	(4,488)	(773)	5,706
Net increase (decrease) in cash and cash equivalents	88,858	51,621	(92,173)
Cash and cash equivalents at beginning of year	160,490	108,869	201,042
Cash and cash equivalents at end of year	$ 249,348	$ 160,490	$ 108,869