Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net earnings	$ 119,833	$ 158,223	$ 131,824
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	54,317	53,945	55,994
Write-off of assets relating to restructuring and other exit charges	3,736	1,435	3,800
Non-cash write-off of property, plant and equipment	0	6,300	0
Impairment of goodwill	0	12,216	31,411
Impairment of indefinite-lived intangibles and fixed assets	0	1,800	4,841
Derivatives not designated in hedging relationships:
Net (gains) losses	(180)	471	409
Cash proceeds (settlements)	43	(1,225)	648
Provision for doubtful accounts	822	1,794	4,749
Deferred income taxes	(20,313)	1,455	(753)
Legal proceedings accrual / (reversal of legal accrual, net of fees)	0	23,725	(799)
Non-cash interest expense	1,603	1,388	2,794
Stock-based compensation	19,453	19,185	19,603
Loss (gain) on sale of facility	0	0	(4,348)
Gain on disposal of fixed assets	116	(7)	(114)
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(32,242)	(13,535)	31,142
Inventories	(38,075)	(42,792)	11,667
Prepaid and other current assets	14,470	3,721	4,751
Other assets	(1,150)	2,034	(331)
Accounts payable	21,266	845	12,178
Accrued expenses	(26,614)	9,333	(4,739)
Other liabilities	93,963	5,719	2,844
Net cash provided by operating activities	211,048	246,030	307,571
Cash flows from investing activities
Capital expenditures	(69,832)	(50,072)	(55,880)
Purchase of businesses, net of cash acquired	(2,988)	(12,392)	(35,439)
Proceeds from sale of facility	0	0	9,179
Proceeds from disposal of property, plant, and equipment	463	631	1,217
Net cash used in investing activities	(72,357)	(61,833)	(80,923)
Cash flows from financing activities
Net increase (decrease) in short-term debt	214	(4,600)	4,233
Proceeds from 2017 Term Loan	150,000	0	0
Proceeds from Notes	0	0	300,000
Repayments of 2011 Term Loan	(127,500)	(15,000)	(7,500)
Repayments of Convertible Notes	0	0	(172,266)
Debt issuance costs	(2,677)	0	(5,031)
Capital lease obligations and other	(29)	(98)	(127)
Proceeds from the issuance of common stock	958	3	4
Payment of taxes related to net share settlement of equity awards	(7,489)	(7,447)	(15,209)
Excess tax benefits from exercise of stock options and vesting of equity awards	0	0	4,291
Purchase of treasury stock	(121,191)	0	(178,244)
Dividends paid to stockholders	(29,674)	(30,400)	(30,880)
Net cash used by financing activities	(166,888)	(62,542)	(105,729)
Effect of exchange rate changes on cash and cash equivalents	49,986	(18,633)	7,467
Net increase in cash and cash equivalents	21,789	103,022	128,386
Cash and cash equivalents at beginning of year	500,329	397,307	268,921
Cash and cash equivalents at end of year	522,118	500,329	397,307
2017 Revolver borrowings
Cash flows from financing activities
Proceeds from Revolver borrowings	379,750	0	0
Repayments of Revolver borrowings	(244,250)	0	0
2011 Revolver borrowings
Cash flows from financing activities
Proceeds from Revolver borrowings	147,050	262,000	355,800
Repayments of Revolver borrowings	$ (312,050)	$ (267,000)	$ (360,800)