Financial Instruments	6 Months Ended
Financial Instruments	Jul. 02, 2017
Fair Value Disclosures [Abstract]
Financial Instruments	Financial Instruments Fair Value The carrying amounts of cash and cash equivalents, trade receivables and trade payables approximate fair value because of the short maturity of these financial instruments. Cash equivalents are carried at cost which approximates fair value at the balance sheet date and are Level 1 financial instruments. On May 11, 2017, we entered into a new five year secured Credit Agreement (the "New Credit Agreement"), that provides for a $400 million revolving line of credit and a $100 million term loan which was funded at closing in full. The New Credit Agreement replaced and terminated the Company’s prior Credit Agreement, dated as of July 31, 2014 (the "Prior Credit Agreement"). The term loan requires quarterly principal payments of 1.125% beginning June 30, 2017. The Company has mandatory debt repayment obligations of $5 million per year ($1.3 million per quarter) until 2022 under the New Credit Agreement. The outstanding principal amounts bear interest at a fluctuating rate per annum (generally the 30 day LIBOR rate) plus an applicable margin, with such margin being determined in accordance with the leverage ratio of the Company. As of July 2, 2017 and December 31, 2016, the outstanding balance of the Company’s debt approximated its fair value based on current rates available to the Company for debt of the same maturity and is a Level 2 financial instrument. The Prior Credit Agreement, under which we had borrowings of approximately $254 million outstanding, was terminated, as of May 11, 2017 and replaced by the New Credit Agreement. Our New Credit Agreement is anticipated to be used to fund potential acquisitions, to support our operational growth initiatives and working capital needs, and for general corporate purposes. As of July 2, 2017, we had borrowings of $252.9 million outstanding under the New Credit Agreement and $40.1 million outstanding under letters of credit. The New Credit Agreement matures on May 11, 2022. Contingent consideration obligations are measured at fair value and are based on significant inputs not observable in the market, which represents a Level 3 measurement within the fair value hierarchy. The valuation of contingent consideration uses assumptions and estimates to forecast a range of outcomes and probabilities for the contingent consideration. Contingent consideration obligations are valued using a Monte Carlo simulation model. We assess these assumptions and estimates on a quarterly basis as additional data impacting the assumptions is obtained. Any changes in the fair value of contingent consideration related to updated assumptions and estimates will be recognized within the special and restructuring (recoveries) charges, net caption on our consolidated statements of income during the period in which the change occurs. Our contingent consideration liability is related to the acquisition of CFS on October 12, 2016, which included an estimate of the contingent payment relating to achievement of specified business performance targets by the acquired business in the twelve month period ending September 30, 2017. The estimated fair value of the contingent consideration is zero as of July 2, 2017 based on actual performance to date and revised forecasts. See Note 4 for additional details related to the transaction. Foreign Currency Contracts The Company is exposed to certain risks relating to its ongoing business operations including foreign currency exchange rate risk and interest rate risk. The Company has used derivative instruments to manage foreign currency risk on certain business transactions denominated in foreign currencies. To the extent the underlying transactions hedged are completed, these forward contracts do not subject us to significant risk from exchange rate movements because they offset gains and losses on the related foreign currency denominated transactions. These forward contracts do not qualify as hedging instruments and, therefore, do not qualify for fair value or cash flow hedge treatment. Any gains and losses on our contracts are recognized as a component of other expense (income), net in our consolidated statements of income. As of July 2, 2017, we had no forward contracts. As of December 31, 2016, we had four forward contracts. The fair value liability of the derivative forward contracts as of December 31, 2016 was $0.1 million and was included in accrued expenses and other current liabilities on our consolidated balance sheet. Our foreign currency forward contracts fall within Level 2 of the fair value hierarchy, in accordance with Accounting Standards Codification ("ASC") Topic 820.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.