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Fair Value (Tables) | 12 Months Ended
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Dec. 31, 2020
Fair Value Disclosures [Abstract] |
Assets and Liabilities Measured at Fair Value on a Recurring Basis | The following table presents the Company’s financial instruments that are measured at fair value on a recurring basis:
|  |  | December 31,
(In thousands) | Fair Value Hierarchy |  | 2020 |  | 2019 |  |
Financial Assets: |  |  |  |  |  |  |
Money market mutual funds 1 | 1 |  | $ | 335,449 |  |  | $ | 223,217 |  |  |
Investment securities |  |  |  |  |  |  |
Municipal bonds | 2 |  | $ | 197 |  |  | $ | 302 |  |  |
Asset-backed securities | 2 |  | 210 |  |  | 247 |  |  |
Mortgage-backed securities | 2 |  | 138 |  |  | 174 |  |  |
Pooled investment fund measured at net asset value 2 |  |  | 9,000 |  |  | 5,000 |  |  |
Fixed-income mutual fund | 1 |  | 27,728 |  |  | 24,737 |  |  |
Total investment securities |  |  | $ | 37,273 |  |  | $ | 30,460 |  |  |
Executive deferred compensation plan trust 3 | 1 |  | $ | 9,586 |  |  | $ | 7,965 |  |  |
Interest rate swaps 4 | 2 |  | $ | — |  |  | $ | 2,395 |  |  |
Liabilities: |  |  |  |  |  |  |
Interest rate swaps 5 | 2 |  | $ | 44,938 |  |  | $ | 19,764 |  |  |
1 The fair value is recorded in cash and cash equivalents. 2 The fair value of this security is measured at NAV as a practical expedient and has not been classified within the fair value hierarchy. The amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated balance sheets. 3 The fair value is recorded as current or long-term based on the timing of the Company's executive deferred compensation plan payment obligations. At December 31, 2020, $0.9 million and $8.7 million in fair value is recorded within prepaid expenses and other current assets and other assets, respectively. At December 31, 2019, $0.9 million and $7.0 million in fair value is recorded within prepaid expenses and other current assets and other assets, respectively. 4 The fair value is recorded as current or long-term depending on the timing of expected discounted cash flows. At December 31, 2019, $2.4 million of fair value is recorded within prepaid expenses and other current assets. 5 The fair value is recorded as current or long-term depending on the timing of expected discounted cash flows. At December 31, 2020, $22.0 million and $22.9 million of fair value is recorded within other current liabilities and other liabilities, respectively. At December 31, 2019, $6.7 million and $13.1 million of fair value is recorded within other current liabilities and other liabilities, respectively.
Pooled Investment Fund | Pooled Investment Fund
(In thousands) | Fair Value |  | Unfunded Commitments |  | Redemption Frequency |  | Redemption Notice Period
Pooled investment fund, as of December 31, 2020 | $ | 9,000 |  |  | — |  |  | Monthly |  | 30 days

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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=121572278&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=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of investments in certain entities that calculate net asset value per share or equivalent measured at fair value on a recurring or 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 6A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=SL6742756-110258 + Details
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