Convertible Debt	3 Months Ended
Convertible Debt	Mar. 31, 2012
Convertible Debt [Abstract]
Convertible Debt	4. Convertible Debt On March 31, 2012, the Company had $34.9 million of 5.5.% Senior Convertible Notes outstanding, or 2007 Notes, and an outstanding tender offer for the 2007 Notes, which expired on March 30, 2012. All noteholders validly tendered their 2007 Notes in response to the tender offer, and the Company repurchased the remaining $34.9 million in principal amount outstanding as of April 2, 2012 for a total cash payment of $35.8 million, including accrued and unpaid interest. No further obligation remains outstanding for the notes as of April 2, 2012.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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