Short-Term Borrowings	9 Months Ended
Short-Term Borrowings	Sep. 30, 2012
Short-term Debt [Abstract]
Debt Disclosure [Text Block]	Short-Term Borrowings At September 30, 2012, there were $2.8 million of outstanding borrowings, $3.6 million of letters of credit outstanding, and $43.6 million available to borrow under the Credit Agreement with JPMorgan Chase Bank, N.A., the term of which expires on November 30, 2012. The Company is evaluating options to address the expiration of the Credit Facility including refinancing with a new credit facility. At December 31, 2011 there were no outstanding borrowings. The Company was in compliance with all covenants under the Credit Agreement as of September 30, 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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