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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2018
Fair Value Disclosures [Abstract] |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis | Our financial assets and (liabilities) carried at fair value measured on a recurring basis as of September 30, 2018 and December 31, 2017, consisted of the following (in thousands):
|  |  |  | Fair Value Measurements Using |  |  |  |
|  | Total Fair |  | Quoted prices in |  | Significant other |  | Significant
|  | Value at |  | active markets |  | observable inputs |  | unobservable inputs
Description |  | September 30, 2018 |  | (Level 1) |  | (Level 2) |  | (Level 3)
Interest rate contracts (1) |  | $ | 8,284 |  | $ | — |  | $ | 8,284 |  | $ | —
Foreign currency contract assets, current and long-term (2) |  | $ | 1,334 |  | $ | — |  | $ | 1,334 |  | $ | —
Foreign currency contract liabilities, current and long-term (3) |  | $ | (771) |  | $ | — |  | $ | (771) |  | $ | —
|  |  |  | Fair Value Measurements Using |  |  |  |
|  | Total Fair |  | Quoted prices in |  | Significant other |  | Significant
|  | Value at |  | active markets |  | observable inputs |  | unobservable inputs
Description |  | December 31, 2017 |  | (Level 1) |  | (Level 2) |  | (Level 3)
Interest rate contracts (1) |  | $ | 5,749 |  | $ | — |  | $ | 5,749 |  | $ | —
Foreign currency contract assets, current and long-term (2) |  | $ | 621 |  | $ | — |  | $ | 621 |  | $ | —
Foreign currency contract liabilities, current and long-term (3) |  | $ | (1,391) |  | $ | — |  | $ | (1,391) |  | $ | —
(1) The fair value of the interest rate contracts is determined using Level 2 fair value inputs and is recorded as other assets or other long-term obligations in the consolidated balance sheets. (2) The fair value of the foreign currency contract assets (including those designated as hedging instruments and those not designated as hedging instruments) is determined using Level 2 fair value inputs and is recorded as prepaid expenses and other assets or other long-term assets in the consolidated balance sheets. (3) The fair value of the foreign currency contract liabilities (including those designated as hedging instruments and those not designated as hedging instruments) is determined using Level 2 fair value inputs and is recorded as accrued expenses or other long-term obligations in the consolidated balance sheets.
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation | Changes in the fair value of our contingent consideration liability during the three and nine-month periods ended September 30, 2018 and 2017, consisted of the following (in thousands):
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2018 |  | 2017 |  | 2018 |  | 2017
Beginning balance | $ | 10,912 |  | $ | 5,572 |  | $ | 10,956 |  | $ | 683
Contingent consideration liability recorded as the result of acquisitions (see Note 5) | — |  | 5,500 |  | — |  | 10,400
Fair value adjustments recorded to income during the period | (828) |  | 20 |  | (741) |  | 39
Contingent payments made | (53) |  | (15) |  | (184) |  | (45)
Ending balance | $ | 10,031 |  | $ | 11,077 |  | $ | 10,031 |  | $ | 11,077
Fair Value Inputs, Liabilities, Quantitative Information | The recurring Level 3 measurement of our contingent consideration liability and contingent receivable includes the following significant unobservable inputs at September 30, 2018 and December 31, 2017 (amounts in thousands):
Contingent consideration asset or liability |  | Fair Value at September 30, 2018 |  | Valuation technique |  | Unobservable inputs |  | Range
Revenue-based payments |  | $ | 10,031 |  | Discounted cash flow |  | Discount rate |  | 9.9% - 15%
contingent liability |  |  |  |  |  | Projected year of payments |  | 2018-2037
Contingent receivable |  | $ | 308 |  | Discounted cash flow |  | Discount rate |  | 10% |
asset |  |  |  |  |  | Weighted-average probability of milestone payment |  | 35% |
|  |  |  |  |  | Projected year of payments |  | 2018-2019
Contingent consideration asset or liability |  | Fair Value at December 31, 2017 |  | Valuation technique |  | Unobservable inputs |  | Range
Revenue-based payments |  | $ | 10,956 |  | Discounted cash flow |  | Discount rate |  | 9.9% - 15%
contingent liability |  |  |  |  |  | Probability of milestone payment |  | 100% |
|  |  |  |  |  | Projected year of payments |  | 2018-2037
Contingent receivable |  | $ | 760 |  | Discounted cash flow |  | Discount rate |  | 10% |
asset |  |  |  |  |  | Weighted-average probability of milestone payment |  | 75% |
|  |  |  |  |  | Projected year of payments |  | 2018-2019

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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