Consolidated Statements of Operations and (Accumulated Deficit) Retained Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues [Abstract]
Net sales	$ 146,472	$ 149,863	$ 299,485	$ 289,623
Cost of products sold	104,070	110,632	213,259	214,750
Gross profit	42,402	39,231	86,226	74,873
Operating Expenses [Abstract]
Selling expenses	16,447	15,509	32,814	31,535
General and administrative expenses	12,546	10,899	26,724	22,351
Restructuring charges	0		430	430
Amortization of intangibles	489	509	988	1,030
Total operating expenses	29,482	26,917	60,526	55,346
Income (loss) from operations	12,920	12,314	25,700	19,527
Other Income & Expenses [Abstract]
Interest and debt expense	3,505	3,557	7,004	7,061
Investment income	(382)	(287)	(662)	(549)
Foreign currency exchange (loss) gain	190	200	(146)	218
Other income, net	(173)	(300)	(495)	(481)
(Loss) income from continuing operations before income tax expense (benefit)	9,780	9,144	19,999	13,278
Income Tax Expense Benefit [Abstract]
Income Tax Expense Benefit	1,528	2,877	3,311	4,232
Income (Loss) from continuing operations	8,252	6,267	16,688	9,046
Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax & Other [Abstract]
Income from discontinued operations		409	0	409
Profit Loss	8,252	6,676	16,688	9,455
Retained Earnings Accumulated Deficit [Abstract]
New Accounting Pronouncement Or Change In Accounting Principle Name	-	-
(Accumulated Deficit) retained earnings - beginning of period	34,331	1,707	25,895	(1,072)
Accumulated deficit (retained earnings) - end of period	$ 42,583	$ 8,383	$ 42,583	$ 8,383
Weighted Average Number Of Shares Outstanding Basic [Abstract]
Weighted Average Number Of Shares Outstanding Basic	19,419	19,274	19,384	19,224
Weighted Average Number Of Shares Outstanding [Abstract]
Weighted Average Number Of Diluted Shares Outstanding	19,581	19,471	19,546	19,511
Earnings Per Share Basic [Abstract]
Income Loss From Continuing Operations Per Basic Share	$ 0.42	$ 0.33	$ 0.86	$ 0.47
Income Loss From Discontinued Operations Net Of Tax Per Basic Share		$ 0.02	$ 0.00	$ 0.02
Earnings Per Share Basic	$ 0.42	$ 0.35	$ 0.86	$ 0.49
Earnings Per Share Diluted [Abstract]
Income Loss From Continuing Operations Per Diluted Share	$ 0.42	$ 0.32	$ 0.85	$ 0.46
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share		$ 0.02	$ 0.00	$ 0.02
Earnings Per Share Diluted	$ 0.42	$ 0.34	$ 0.85	$ 0.48