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Subsequent Events (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended		0 Months Ended
	Sep. 28, 2012	Oct. 24, 2012	Nov. 05, 2012 Dental Distribution Business [Member]
Subsequent Events [Abstract]
Sale of Stock, Price Per Share		$ 29.00
Debt Instrument, Covenant Description	If a change in control of the Company occurs, each holder of the 2012 Notes will have the right to require the Company to repurchase all or part of their outstanding notes for cash at 101% of the aggregate principal amount of the securities repurchased plus accrued and unpaid interest.
Sale of business [Line Items]
Sale price of divestiture			$ 68,000

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

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