Consolidated Statements of Operations and (Accumulated Deficit) Retained Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Revenues [Abstract]
Net sales	$ 153,225	$ 142,750	$ 452,710	$ 432,373
Cost of products sold	109,428	104,147	322,687	318,897
Gross profit	43,797	38,603	130,023	113,476
Operating Expenses [Abstract]
Selling expenses	16,390	15,980	49,204	47,515
General and administrative expenses	12,725	11,605	39,448	33,956
Restructuring charges	0	(1,467)		(1,037)
Amortization of intangibles	493	485	1,481	1,515
Total operating expenses	29,608	26,603	90,133	81,949
Income (loss) from operations	14,189	12,000	39,890	31,527
Other Income & Expenses [Abstract]
Interest and debt expense	3,413	3,590	10,418	10,651
Investment income	(354)	(275)	(1,017)	(824)
Foreign currency exchange (loss) gain	293	(97)	147	121
Other income, net	65	(1,399)	(429)	(1,880)
(Loss) income from continuing operations before income tax expense (benefit)	10,772	10,181	30,771	23,459
Income Tax Expense Benefit [Abstract]
Income Tax Expense Benefit	1,193	1,666	4,504	5,898
Income (Loss) from continuing operations	9,579	8,515	26,267	17,561
Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax & Other [Abstract]
Income from discontinued operations		0	0	409
Profit Loss	9,579	8,515	26,267	17,970
Retained Earnings Accumulated Deficit [Abstract]
New Accounting Pronouncement Or Change In Accounting Principle Name	-			-
(Accumulated Deficit) retained earnings - beginning of period	42,583	8,383	25,895	(1,072)
Accumulated deficit (retained earnings) - end of period	$ 52,162	$ 16,898	$ 52,162	$ 16,898
Weighted Average Number Of Shares Outstanding Basic [Abstract]
Weighted Average Number Of Shares Outstanding Basic	19,451	19,313	19,406	19,256
Weighted Average Number Of Shares Outstanding [Abstract]
Weighted Average Number Of Diluted Shares Outstanding	19,697	19,488	19,620	19,526
Earnings Per Share Basic [Abstract]
Income Loss From Continuing Operations Per Basic Share	$ 0.49	$ 0.44	$ 1.35	$ 0.91
Income Loss From Discontinued Operations Net Of Tax Per Basic Share		$ 0	$ 0.00	$ 0.02
Earnings Per Share Basic	$ 0.49	$ 0.44	$ 1.35	$ 0.93
Earnings Per Share Diluted [Abstract]
Income Loss From Continuing Operations Per Diluted Share	$ 0.49	$ 0.44	$ 1.34	$ 0.90
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share		$ 0	$ 0.00	$ 0.02
Earnings Per Share Diluted	$ 0.49	$ 0.44	$ 1.34	$ 0.92