This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Company may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Level 4 Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended			3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Accounts Receivable [Member] Credit Concentration Risk [Member]	Dec. 31, 2012 Accounts Receivable [Member] Credit Concentration Risk [Member]	Mar. 31, 2013 6.375% senior notes [Member]	Dec. 31, 2012 6.375% senior notes [Member]
Vendor rebates and allowances	$ 1,700,000		$ 4,100,000
Customer rebates payable	16,600,000		19,700,000
Rental expense	3,600,000	3,600,000
Money market funds, fair value	175,700,000		10,600,000
6.375% senior notes, book value						250,000,000	250,000,000
6.375% senior notes, fair value						$ 270,800,000
Concentration of credit risk				12.00%	14.00%