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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 | A summary of financial assets and liabilities that are measured at fair value on a recurring basis, as of September 30, 2018 and December 31, 2017, were as follows (in thousands):
| Quoted Prices in Active Markets |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs |  |
| (Level 1) |  | (Level 2) |  | (Level 3) |  | Total
September 30, 2018 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Investments: |  |  |  |  |  |  |
Cash surrender value of life insurance policies - deferred compensation plan | $ | — |  |  | $ | 31,306 |  |  | $ | — |  |  | $ | 31,306 |
Marketable securities - other | 54 |  |  | — |  |  | — |  |  | 54 |
Liabilities: |  |  |  |  |  |  |
Derivative financial instruments | — |  |  | 45 |  |  | — |  |  | 45 |
Deferred compensation plan | — |  |  | 25,970 |  |  | — |  |  | 25,970 |
December 31, 2017 |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |
Investments: |  |  |  |  |  |  |
Cash surrender value of life insurance policies - deferred compensation plan | $ | — |  |  | $ | 30,351 |  |  | $ | — |  |  | $ | 30,351 |
Marketable securities - other | 113 |  |  | — |  |  | — |  |  | 113 |
Liabilities: |  |  |  |  |  |  |
Derivative financial instruments | — |  |  | 487 |  |  | — |  |  | 487 |
Deferred compensation plan | — |  |  | 26,797 |  |  | — |  |  | 26,797 |

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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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