Summary Financial Information (Statement of Financial Position) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Mar. 31, 2011
Summary Financial Information [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	7.875%	7.875%
Assets Current [Abstract]
Cash And Cash Equivalents At Carrying Value	$ 94,927		$ 89,473	$ 78,746	$ 80,139
Accounts Receivable Net Current	82,933		88,642
Inventory Net	112,051		108,055
Prepaid Expense Current	13,662		10,449
Assets Current	303,573		296,619
Property Plant And Equipment Net	59,842		61,709
Goodwill and other intangibles, net	119,881		122,226
Intercompany	0
Other assets	33,412		34,853
Investment in subsidiaries	0		0
Assets	516,708		515,407
Liabilities Current	92,795		103,909
Long-term debt, less current portion	151,426		151,889
Other Liabilities Noncurrent	96,131		99,143
Total liabilities	340,352		354,941
Stockholders Equity Including Portion Attributable To Noncontrolling Interest	176,356		160,466
Liabilities And Stockholders Equity	516,708		515,407
Parent Company [Member]
Assets Current [Abstract]
Cash And Cash Equivalents At Carrying Value	59,593		55,958	47,904	45,954
Accounts Receivable Net Current	36,348		44,375
Inventory Net	32,913		29,161
Prepaid Expense Current	6,746		5,398
Assets Current	135,600		134,892
Property Plant And Equipment Net	33,283		32,679
Goodwill and other intangibles, net	40,919		40,906
Intercompany	(4,154)		(41,502)
Other assets	5,786		6,449
Investment in subsidiaries	203,753		228,138
Assets	415,187		401,562
Liabilities Current	35,411		37,480
Long-term debt, less current portion	148,276		148,140
Other Liabilities Noncurrent	55,144		55,476
Total liabilities	238,831		241,096
Stockholders Equity Including Portion Attributable To Noncontrolling Interest	176,356		160,466
Liabilities And Stockholders Equity	415,187		401,562
Guarantor Subsidiaries [Member]
Assets Current [Abstract]
Cash And Cash Equivalents At Carrying Value	0		5	6	7
Accounts Receivable Net Current	5,662		5,579
Inventory Net	18,442		20,087
Prepaid Expense Current	1,798		502
Assets Current	25,902		26,173
Property Plant And Equipment Net	12,018		13,050
Goodwill and other intangibles, net	31,025		31,025
Intercompany	68,028		102,471
Other assets	783		784
Investment in subsidiaries	0		0
Assets	137,756		173,503
Liabilities Current	13,806		18,772
Long-term debt, less current portion	1,810		1,961
Other Liabilities Noncurrent	6,796		6,842
Total liabilities	22,412		27,575
Stockholders Equity Including Portion Attributable To Noncontrolling Interest	115,344		145,928
Liabilities And Stockholders Equity	137,756		173,503
Non-Guarantor Subsidiaries [Member]
Assets Current [Abstract]
Cash And Cash Equivalents At Carrying Value	35,334		33,510	30,836	34,178
Accounts Receivable Net Current	40,923		38,688
Inventory Net	60,696		61,347
Prepaid Expense Current	5,118		4,004
Assets Current	142,071		137,549
Property Plant And Equipment Net	14,541		15,980
Goodwill and other intangibles, net	47,937		50,295
Intercompany	(62,359)		(61,149)
Other assets	26,843		27,620
Investment in subsidiaries	0		0
Assets	169,033		170,295
Liabilities Current	45,093		49,472
Long-term debt, less current portion	1,340		1,788
Other Liabilities Noncurrent	34,191		36,825
Total liabilities	80,624		88,085
Stockholders Equity Including Portion Attributable To Noncontrolling Interest	88,409		82,210
Liabilities And Stockholders Equity	169,033		170,295
Consolidation, Eliminations [Member]
Assets Current [Abstract]
Inventory Net	0		(2,540)
Prepaid Expense Current	0		545
Assets Current	0		(1,995)
Intercompany	(1,515)		180
Investment in subsidiaries	(203,753)		(228,138)
Assets	(205,268)		(229,953)
Liabilities Current	(1,515)		(1,815)
Total liabilities	(1,515)		(1,815)
Stockholders Equity Including Portion Attributable To Noncontrolling Interest	(203,753)		(228,138)
Liabilities And Stockholders Equity	$ (205,268)		$ (229,953)