Borrowings	9 Months Ended
Sep. 30, 2018
Debt Disclosure [Abstract]
Borrowings	Borrowings On October 24, 2014, the Company entered into a credit agreement that provided for a $50,000 revolving credit facility (the “Credit Facility”). On February 23, 2015, the Company increased the commitments under the Credit Facility by up to an additional $50,000. The Credit Facility had a maturity date of October 24, 2019 and was voluntarily pre-payable from time to time without premium or penalty. On November 21, 2017, the Company prepaid all outstanding amounts, including accrued interest and fees, and terminated all commitments, under the Credit Agreement. On November 21, 2017, the Company and each of the Company’s wholly owned material domestic subsidiaries entered into a Credit Agreement with certain lenders, and Citibank, N.A. as Administrative Agent (the “New Credit Agreement”). The New Credit Agreement provides for a $200,000 revolving credit facility (the “New Credit Facility”) with an option to increase the commitments by up to $100,000, subject to certain approvals and conditions as set forth in the New Credit Agreement. The New Credit Agreement also includes a letter of credit sub facility. The New Credit Facility has a maturity date of November 21, 2022 and is voluntarily pre-payable from time to time without premium or penalty. Borrowings under the New Credit Agreement were used to repay amounts outstanding under the Credit Facility and may otherwise be used for working capital and general corporate purposes, including permitted acquisitions. On July 2, 2018, the Company exercised its option under the New Credit Agreement to increase the commitments by $100,000 thereby utilizing the entire revolver under the New Credit Facility of $300,000, to fund SCIO acquisition. The incremental commitments were made pursuant to (and constitute part of) the existing commitments and shall be subject to the terms and conditions applicable to the existing commitments as set forth in the New Credit Agreement. Depending on the type of borrowing, loans under the New Credit Agreement bear interest at a rate equal to the specified prime rate (alternate base rate) or adjusted LIBO rate, plus, in each case, an applicable margin. The applicable margin is tied to the Company’s total net leverage ratio and ranges from 0% to 0.75% per annum with respect to loans pegged to the specified prime rate, and 1.00% to 1.75% per annum on loans pegged to the adjusted LIBO rate. The revolving credit commitments under the New Credit Agreement are subject to a commitment fee, which is also tied to the Company’s total net leverage ratio, and ranges from 0.15% to 0.30% per annum on the average daily amount by which the aggregate revolving commitments exceed the sum of outstanding revolving loans and letter of credit obligations. Obligations under the New Credit Agreement are guaranteed by the Company’s material domestic subsidiaries and are secured by all or substantially all of the assets of the Company and our material domestic subsidiaries. The New Credit Agreement contains affirmative and negative covenants, including, but not limited to, restrictions on the ability to incur indebtedness, create liens, make certain investments, make certain dividends and related distributions, enter into, or undertake, certain liquidations, mergers, consolidations or acquisitions and dispose of assets or subsidiaries. In addition, the New Credit Agreement contains a covenant to not permit the interest coverage ratio or the total net leverage ratio, both as defined for the four consecutive quarter period ending on the last day of each fiscal quarter, to be less than 3.5 to 1.0 or more than 3.0 to 1.0, respectively. As of September 30, 2018, the Company was in compliance with all financial and non-financial covenants listed under the New Credit Agreement. As of September 30, 2018, we had outstanding debt of $300,000, of which $12,000 is expected to be repaid within the next twelve months and is included under “current portion of long-term borrowings” and of which $288,000 is included under “long-term borrowings” in the unaudited consolidated balance sheets. As of December 31, 2017, we had an outstanding debt of $60,000, of which $10,000 was included under “current portion of long-term borrowings,” and the balance of $50,000 was included under “long-term borrowings” in the consolidated balance sheets. The Company incurred certain debt issuance costs, which are deferred and amortized as an adjustment to interest expense over the term of the debt. The unamortized debt issuance costs as of September 30, 2018 and December 31, 2017 was $1,364 and $773, respectively, and is included under "other current assets" and “other assets” in the consolidated balance sheets. Borrowings also includes structured payables which are in the nature of debt, amounting to $627 and $709 as of September 30, 2018 and December 31, 2017, respectively, of which $318 and $318 is included under "current portion of long-term borrowings", $309 and $391, respectively, under "long-term borrowings" in the consolidated balance sheets.

Borrowings

On October 24, 2014, the Company entered into a credit agreement that provided for a $50,000 revolving credit facility (the “Credit Facility”). On February 23, 2015, the Company increased the commitments under the Credit Facility by up to an additional $50,000. The Credit Facility had a maturity date of October 24, 2019 and was voluntarily pre-payable from time to time without premium or penalty. On November 21, 2017, the Company prepaid all outstanding amounts, including accrued interest and fees, and terminated all commitments, under the Credit Agreement.

On November 21, 2017, the Company and each of the Company’s wholly owned material domestic subsidiaries entered into a Credit Agreement with certain lenders, and Citibank, N.A. as Administrative Agent (the “New Credit Agreement”). The New Credit Agreement provides for a $200,000 revolving credit facility (the “New Credit Facility”) with an option to increase the commitments by up to $100,000, subject to certain approvals and conditions as set forth in the New Credit Agreement. The New Credit Agreement also includes a letter of credit sub facility. The New Credit Facility has a maturity date of November 21, 2022 and is voluntarily pre-payable from time to time without premium or penalty. Borrowings under the New Credit Agreement were used to repay amounts outstanding under the Credit Facility and may otherwise be used for working capital and general corporate purposes, including permitted acquisitions. On July 2, 2018, the Company exercised its option under the New Credit Agreement to increase the commitments by $100,000 thereby utilizing the entire revolver under the New Credit Facility of $300,000, to fund SCIO acquisition. The incremental commitments were made pursuant to (and constitute part of) the existing commitments and shall be subject to the terms and conditions applicable to the existing commitments as set forth in the New Credit Agreement.

Depending on the type of borrowing, loans under the New Credit Agreement bear interest at a rate equal to the specified prime rate (alternate base rate) or adjusted LIBO rate, plus, in each case, an applicable margin. The applicable margin is tied to the Company’s total net leverage ratio and ranges from 0% to 0.75% per annum with respect to loans pegged to the specified prime rate, and 1.00% to 1.75% per annum on loans pegged to the adjusted LIBO rate. The revolving credit commitments under the New Credit Agreement are subject to a commitment fee, which is also tied to the Company’s total net leverage ratio, and ranges from 0.15% to 0.30% per annum on the average daily amount by which the aggregate revolving commitments exceed the sum of outstanding revolving loans and letter of credit obligations.

Obligations under the New Credit Agreement are guaranteed by the Company’s material domestic subsidiaries and are secured by all or substantially all of the assets of the Company and our material domestic subsidiaries. The New Credit Agreement contains affirmative and negative covenants, including, but not limited to, restrictions on the ability to incur indebtedness, create liens, make certain investments, make certain dividends and related distributions, enter into, or undertake, certain liquidations, mergers, consolidations or acquisitions and dispose of assets or subsidiaries. In addition, the New Credit Agreement contains a covenant to not permit the interest coverage ratio or the total net leverage ratio, both as defined for the four consecutive quarter period ending on the last day of each fiscal quarter, to be less than 3.5 to 1.0 or more than 3.0 to 1.0, respectively. As of September 30, 2018, the Company was in compliance with all financial and non-financial covenants listed under the New Credit Agreement.

As of September 30, 2018, we had outstanding debt of $300,000, of which $12,000 is expected to be repaid within the next twelve months and is included under “current portion of long-term borrowings” and of which $288,000 is included under “long-term borrowings” in the unaudited consolidated balance sheets. As of December 31, 2017, we had an outstanding debt of $60,000, of which $10,000 was included under “current portion of long-term borrowings,” and the balance of $50,000 was included under “long-term borrowings” in the consolidated balance sheets.

The Company incurred certain debt issuance costs, which are deferred and amortized as an adjustment to interest expense over the term of the debt. The unamortized debt issuance costs as of September 30, 2018 and December 31, 2017 was $1,364 and $773, respectively, and is included under "other current assets" and “other assets” in the consolidated balance sheets.

Borrowings also includes structured payables which are in the nature of debt, amounting to $627 and $709 as of September 30, 2018 and December 31, 2017, respectively, of which $318 and $318 is included under "current portion of long-term borrowings", $309 and $391, respectively, under "long-term borrowings" in the consolidated balance sheets.