Credit Agreement (Notes)	12 Months Ended
Credit Agreement (Notes)	Dec. 31, 2013
Debt Disclosure [Abstract]
Credit Agreement [Text Block]	Credit Agreement In September 2013, we entered into a credit agreement (the "Credit Agreement") with Wells Fargo Bank, National Association, as administrative agent, and the lenders from time to time party thereto. The Credit Agreement provides for a $75.0 million revolving credit facility with a $10.0 million letter of credit sub-limit. Loans under the Credit Agreement mature on September 25, 2018. The Credit Agreement permits us to request one or more increases in the aggregate commitments provided that such increases do not exceed $25.0 million in the aggregate. We expect to use the proceeds from any revolving loans under the credit facility for general corporate purposes, including future acquisitions. Our obligations under the Credit Agreement are guaranteed by certain of our domestic subsidiaries and secured by substantially all of our and the subsidiary guarantors’ assets. To date, we have not yet drawn any funds under the credit facility. Amounts drawn under the Credit Agreement bear interest, at our election, at a Eurodollar rate plus a margin of 1.75% per annum, or an alternate base rate equal to the highest of (a) the prime rate, (b) the federal funds rate plus 0.50%, and (c) LIBOR for an interest period of one month plus 1.75%. We are required to pay a commitment fee of 0.25% per annum on the aggregate undrawn amount of the commitments under the credit facility. The Credit Agreement contains customary affirmative and negative covenants, including, among other things, restrictions on indebtedness, liens, investments, mergers, dispositions, dividends and other distributions. The Credit Agreement contains financial covenants that require us to, among other things, maintain a maximum consolidated total leverage ratio and a minimum consolidated fixed charge coverage ratio, in each case, as of the last day of each fiscal quarter. We were in full compliance with all covenants at December 31, 2013.

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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