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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Tables) | 12 Months Ended
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Dec. 31, 2017
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS |
Schedule components of cash and cash equivalents, short term investments, and restricted funds |
|  | December 31 |  | December 31 |
|  | 2017 |  | 2016 |
|  | (in thousands) |
Cash and cash equivalents |  |  |  |  |  |  |
Cash deposits(1) |  | $ | 86,510 |  | $ | 92,520 |
Variable rate demand notes(1)(2) |  |  | 19,744 |  |  | 16,057 |
Money market funds(3) |  |  | 14,518 |  |  | 5,703 |
Total cash and cash equivalents |  | $ | 120,772 |  | $ | 114,280 |
Short-term investments |  |  |  |  |  |  |
Certificates of deposit(1) |  | $ | 56,401 |  | $ | 56,838 |
Restricted cash |  |  |  |  |  |  |
Cash deposits(1) |  | $ | — |  | $ | 962 |
| (1) |  | Recorded at cost plus accrued interest, which approximates fair value.
| (2) |  | Amounts may be redeemed on a daily basis with the original issuer.
| (3) |  | Recorded at fair value as determined by quoted market prices (see amounts presented in the table of financial assets and liabilities measured at fair value within this Note).
Schedule of fair value and carrying value disclosures of financial instruments |
|  | December 31 |  | December 31 |
|  | 2017 |  | 2016 |
|  | (in thousands) |
|  |  | Carrying |  |  | Fair |  |  | Carrying |  |  | Fair |
|  |  | Value |  |  | Value |  |  | Value |  |  | Value |
Credit Facility(1) |  | $ | 70,000 |  | $ | 70,000 |  | $ | 70,000 |  | $ | 70,000 |
Accounts receivable securitization borrowings(2) |  |  | 45,000 |  |  | 45,000 |  |  | 35,000 |  |  | 35,000 |
Notes payable(3) |  |  | 153,441 |  |  | 152,131 |  |  | 138,032 |  |  | 137,503 |
|  | $ | 268,441 |  | $ | 267,131 |  | $ | 243,032 |  | $ | 242,503 |
| (1) |  | The revolving credit facility (the “Credit Facility”) carries a variable interest rate based on LIBOR, plus a margin, that is considered to be priced at market for debt instruments having similar terms and collateral requirements (Level 2 of the fair value hierarchy).
| (2) |  | Borrowings under the Company’s accounts receivable securitization program carry a variable interest rate based on LIBOR, plus a margin, that is considered to be priced at market for debt instruments having similar terms and collateral requirements (Level 2 of the fair value hierarchy).
| (3) |  | Fair value of the notes payable was determined using a present value income approach based on quoted interest rates from lending institutions with which the Company would enter into similar transactions (Level 2 of the fair value hierarchy).
Schedule of financial assets and liabilities measured at fair value on a recurring basis |
|  | December 31, 2017 |
|  |  |  |  | Fair Value Measurements Using |
|  |  |  |  | Quoted Prices |  | Significant |  | Significant |
|  |  |  |  | In Active |  | Observable |  | Unobservable |
|  |  |  |  | Markets |  | Inputs |  | Inputs |
|  | Total |  | (Level 1) |  | (Level 2) |  | (Level 3) |
|  | (in thousands) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds(1) |  | $ | 14,518 |  | $ | 14,518 |  | $ | — |  | $ | — |
Equity, bond, and money market mutual funds held in trust related to the Voluntary Savings Plan(2) |  |  | 2,359 |  |  | 2,359 |  |  | — |  |  | — |
Interest rate swap(3) |  |  | 481 |  |  | — |  |  | 481 |  |  | — |
|  | $ | 17,358 |  | $ | 16,877 |  | $ | 481 |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration(4) |  | $ | 6,970 |  | $ | — |  | $ | — |  | $ | 6,970 |
|  | December 31, 2016 |
|  |  |  |  | Fair Value Measurements Using |
|  |  |  |  | Quoted Prices |  | Significant |  | Significant |
|  |  |  |  | In Active |  | Observable |  | Unobservable |
|  |  |  |  | Markets |  | Inputs |  | Inputs |
|  | Total |  | (Level 1) |  | (Level 2) |  | (Level 3) |
|  | (in thousands) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds(1) |  | $ | 5,703 |  | $ | 5,703 |  | $ | — |  | $ | — |
Equity, bond, and money market mutual funds held in trust related to the Voluntary Savings Plan(2) |  |  | 2,220 |  |  | 2,220 |  |  | — |  |  | — |
|  | $ | 7,923 |  | $ | 7,923 |  | $ | — |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration(4) |  | $ | 6,775 |  | $ | — |  | $ | — |  | $ | 6,775 |
Interest rate swap(3) |  |  | 542 |  |  | — |  |  | 542 |  |  | — |
|  | $ | 7,317 |  | $ | — |  | $ | 542 |  | $ | 6,775 |
| (1) |  | Included in cash equivalents.
| (2) |  | Nonqualified deferred compensation plan investments consist of U.S. and international equity mutual funds, government and corporate bond mutual funds, and money market funds which are held in a trust with a third‑party brokerage firm. Included in other long‑term assets, with a corresponding liability reported within other long‑term liabilities.
| (3) |  | Included in other long‑term assets or liabilities. The fair values of the interest rate swaps were determined by discounting future cash flows and receipts based on expected interest rates observed in market interest rate curves adjusted for estimated credit valuation considerations reflecting nonperformance risk of the Company and the counterparty, which are considered to be in Level 3 of the fair value hierarchy. The Company assessed Level 3 inputs as insignificant to the valuation at December 31, 2017 and December 31, 2016 and considers the interest rate swap valuations in Level 2 of the fair value hierarchy.
| (4) |  | Included in accrued expenses and other long-term liabilities, based on when expected payouts become due. The estimated fair value of contingent consideration for an earn-out agreement related to the September 2016 acquisition of LDS was determined by assessing Level 3 inputs with a discounted cash flow approach using various probability-weighted scenarios. The Level 3 assessments utilize a Monte Carlo simulation with inputs including scenarios of estimated revenues and gross margins to be achieved for the applicable performance periods, probability weightings assigned to the performance scenarios, and the discount rate applied, which was 12.5% and 12.3% as of December 31, 2017 and 2016, respectively. Subsequent changes to the fair value as a result of recurring assessments will be recognized in operating income.
Schedule of changes in fair value of the liabilities |
|  | Contingent Consideration |
|  | (in thousands)
Balances at December 31, 2015 |  | $ | — |
Contingent consideration liability recorded at fair value for business acquisition |  |  | 6,711 |
Change in fair value included in operating expenses |  |  | 64 |
Balances at December 31, 2016 |  |  | 6,775 |
Change in fair value included in operating expenses |  |  | 195 |
Balances at December 31, 2017 |  | $ | 6,970 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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