Debt and Financial Instruments	9 Months Ended
Sep. 30, 2019
Debt Disclosure [Abstract]
Debt and Financial Instruments	Debt On November 30, 2018, we entered into a Credit Agreement with PNC Bank, National Association, as administrative agent and a syndicate of lenders (the “Credit Agreement”), replacing the prior credit agreement with Wells Fargo dated December 21, 2016, as amended on April 28, 2018 and June 29, 2018 (the "Original Credit Agreement"). The Credit agreement provides for a revolving credit facility, which expires on November 29, 2023, and consists of: a revolving loan facility with a borrowing limit of $200 million, including a $20 million sublimit for foreign borrowings; an accordion feature allowing the Company to request increases in commitments to the credit facility by up to an additional $100 million; a $20 million letter of credit sublimit; and a swingline loan credit sublimit of $20 million. The obligations under the Credit Agreement are guaranteed by certain of the Company's subsidiaries (the "Guarantors"). As collateral security under the Credit Agreement and the guarantees thereof, the Company and the Guarantors have granted to the administrative agent, for the benefit of the lenders, a lien on, and first priority security interest in substantially all of their tangible and intangible assets. The proceeds of the Credit Agreement were used, in part, to repay in full all outstanding borrowings under the Original Credit Agreement, and additional proceeds of the revolving credit facility are expected to be used for working capital and other general corporate purposes of the Company and its subsidiaries, including the issuance of letters of credit and Permitted Acquisitions, as defined. Borrowings under the Credit Agreement may be in the form of Base Rate loans or Euro-Rate loans, at the option of the borrowers, and bear interest at the Base Rate plus 0.25% to 1.25% or the Daily LIBOR Rate plus 1.25% to 2.25% respectively. Base Rate loans will bear interest at a fluctuating per annum Base Rate equal to the highest of (i) the Overnight Bank Funding Rate, plus 0.5%, (ii) the Prime Rate, and (iii) the Daily LIBOR Rate, plus 100 basis points (1.0%); plus an Applicable Margin. Determination of the Applicable Margin is based on a pricing grid that is generally dependent upon the Company's Leverage Ratio (as defined) as of the end of the fiscal quarter for which consolidated financial statements have been most recently delivered. We may prepay the revolving loan, in whole or in part, at any time without premium or penalty, subject to certain conditions. The Credit Agreement contains customary representations, warranties and affirmative covenants. The Credit Agreement also contains customary negative covenants, subject to negotiated exceptions, including but not limited to: (i) liens, (ii) investments, (iii) indebtedness, (iv) significant corporate changes, including mergers and acquisitions, (v) dispositions, (vi) restricted payments, including stock dividends, and (vii) certain other restrictive agreements. The Credit Agreement also requires the Company to maintain compliance with the following financial covenants; (i) a maximum leverage ratio, and (ii) a minimum interest expense coverage ratio. On June 28, 2019 we entered into an amendment to the Credit Agreement that modified the maximum leverage ratio requirements for 2019.We were in compliance with each of these financial covenants under the Credit Agreement, as amended, as of September 30, 2019. As of September 30, 2019, there were $113.2 million of borrowings outstanding and $8.5 million of available borrowings under the revolving loan facility based on our Leverage Ratio. For the nine months ended September 30, 2019 and 2018, the weighted average interest rate on our borrowings was 4.7% and 3.8%, respectively. As of September 30, 2019, the fair value of our borrowings under the Credit Agreement approximated its carrying value as it bears interest at variable rates. There were $1.3 million of unamortized debt issue costs related to the Credit Agreement as of September 30, 2019 which are being amortized to interest expense over the term of the Credit Agreement and are included in Other assets on our consolidated balance sheet.

Debt

On November 30, 2018, we entered into a Credit Agreement with PNC Bank, National Association, as administrative agent and a syndicate of lenders (the “Credit Agreement”), replacing the prior credit agreement with Wells Fargo dated December 21, 2016, as amended on April 28, 2018 and June 29, 2018 (the "Original Credit Agreement"). The Credit agreement provides for a revolving credit facility, which expires on November 29, 2023, and consists of: a revolving loan facility with a borrowing limit of $200 million, including a $20 million sublimit for foreign borrowings; an accordion feature allowing the Company to request increases in commitments to the credit facility by up to an additional $100 million; a $20 million letter of credit sublimit; and a swingline loan credit sublimit of $20 million. The obligations under the Credit Agreement are guaranteed by certain of the Company's subsidiaries (the "Guarantors"). As collateral security under the Credit Agreement and the guarantees thereof, the Company and the Guarantors have granted to the administrative agent, for the benefit of the lenders, a lien on, and first priority security interest in substantially all of their tangible and intangible assets. The proceeds of the Credit Agreement were used, in part, to repay in full all outstanding borrowings under the Original Credit Agreement, and additional proceeds of the revolving credit facility are expected to be used for working capital and other general corporate purposes of the Company and its subsidiaries, including the issuance of letters of credit and Permitted Acquisitions, as defined.

Borrowings under the Credit Agreement may be in the form of Base Rate loans or Euro-Rate loans, at the option of the borrowers, and bear interest at the Base Rate plus 0.25% to 1.25% or the Daily LIBOR Rate plus 1.25% to 2.25% respectively. Base Rate loans will bear interest at a fluctuating per annum Base Rate equal to the highest of (i) the Overnight Bank Funding Rate, plus 0.5%, (ii) the Prime Rate, and (iii) the Daily LIBOR Rate, plus 100 basis points (1.0%); plus an Applicable Margin. Determination of the Applicable Margin is based on a pricing grid that is generally dependent upon the Company's Leverage Ratio (as defined) as of the end of the fiscal quarter for which consolidated financial statements have been most recently delivered. We may prepay the revolving loan, in whole or in part, at any time without premium or penalty, subject to certain conditions.

The Credit Agreement contains customary representations, warranties and affirmative covenants. The Credit Agreement also contains customary negative covenants, subject to negotiated exceptions, including but not limited to: (i) liens, (ii) investments, (iii) indebtedness, (iv) significant corporate changes, including mergers and acquisitions, (v) dispositions, (vi) restricted payments, including stock dividends, and (vii) certain other restrictive agreements. The Credit Agreement also requires the Company to maintain compliance with the following financial covenants; (i) a maximum leverage ratio, and (ii) a minimum interest expense coverage ratio. On June 28, 2019 we entered into an amendment to the Credit Agreement that modified the maximum leverage ratio requirements for 2019.We were in compliance with each of these financial covenants under the Credit Agreement, as amended, as of September 30, 2019.

As of September 30, 2019, there were $113.2 million of borrowings outstanding and $8.5 million of available borrowings under the revolving loan facility based on our Leverage Ratio.

For the nine months ended September 30, 2019 and 2018, the weighted average interest rate on our borrowings was 4.7% and 3.8%, respectively. As of September 30, 2019, the fair value of our borrowings under the Credit Agreement approximated its carrying value as it bears interest at variable rates. There were $1.3 million of unamortized debt issue costs related to the Credit Agreement as of September 30, 2019 which are being amortized to interest expense over the term of the Credit Agreement and are included in Other assets on our consolidated balance sheet.