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Revolving Credit Facility	3 Months Ended
Revolving Credit Facility	Mar. 31, 2016
Debt Disclosure [Abstract]
Revolving Credit Facility	Revolving Credit Facility The Company entered into a Credit Agreement, dated as of August 2, 2010, subsequently amended most recently as of September 25, 2014, among the Company, the lenders party thereto and Bank of America, N.A., as Administrative Agent (the “Credit Agreement”). The Credit Agreement includes a revolving commitment amount of $175 million in the aggregate with a maturity date of September 25, 2019, and provides the Company the right to increase the aggregate commitment amount by an additional $50 million. Outstanding borrowings under the revolving credit facility are guaranteed by the Company’s material domestic subsidiaries, as defined in the Credit Agreement. The Company’s obligations under the Credit Agreement and such domestic subsidiaries’ guaranty obligations are secured by substantially all of their respective assets. The ranges of applicable rates charged for interest on outstanding loans and letters of credit are 125-250 basis point spread for letter of credit fees and loans based on the Eurodollar rate and 25-150 basis point spread for loans based on the base rate. The terms of the Credit Agreement include various covenants, including covenants that require the Company to maintain a maximum leverage ratio and a minimum interest coverage ratio. The Credit Agreement requires the Company to maintain a leverage ratio of no more than 3.00 to 1.0 for the quarter ended March 31, 2016 and 3.00 to 1.0 for each period thereafter. The Company is also required to maintain an interest coverage ratio of no less than 5.00 to 1.0. The Company is in compliance with all debt covenants as of March 31, 2016. At March 31, 2016, the Company had $32.7 million of unused availability under the Credit Agreement and $0.7 million of letters of credit which have not been drawn upon. The fair value of the debt under this Credit Agreement is not materially different from its book value as of March 31, 2016.