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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value of Assets and Liabilities | The following table summarizes the financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017 and the level they fall within the fair value hierarchy (in thousands):
Amounts Recorded at Fair Value |  | Financial Statement Classification |  | Fair Value Hierarchy |  | Fair Value September 30, 2018 |  | Fair Value December 31, 2017
Non-COLI assets held in Deferred Supplemental Compensation Plan |  | Other assets |  | Level 1 |  | $ | 433 |  |  | $ | 389 |
Interest rate swap agreements |  | Other current assets |  | Level 2 |  | $ | 726 |  |  | $ | 294 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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