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Debt	3 Months Ended
Debt	Mar. 31, 2012
Debt [Abstract]
Debt	(6) Debt: The Company maintains a revolving line of credit with a $30,000 limit, with an expiration date of September 23, 2014. Interest on this line of credit is referenced to LIBOR and can be fixed for periods of up to one year at the Company's option. Outstanding drawings on this line of credit were $10,000 as of March 31, 2012 and December 31, 2011. At March 31, 2012, the effective interest rate was 1.14%. The Company has $20,000 remaining unused under the line of credit at March 31, 2012. The current outstanding borrowings were used principally for treasury stock repurchases and extra dividend payments.

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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