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Fair Value Measurements - Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest Rate Swap Liability | $ (37,559) | $ (53,975)
Recurring Basis |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Corporate Owned Life Insurance Asset | 4,609 | 4,454
Mutual Funds Asset | 6,939 | 6,643
Deferred Compensation Liability | (8,554) | (10,599)
Recurring Basis | Quoted Prices in Active Markets for Identical Assets and Liabilities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Corporate Owned Life Insurance Asset | 0 | 0
Mutual Funds Asset | 6,939 | 6,643
Deferred Compensation Liability | 0 | 0
Recurring Basis | Significant Other Observable Inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Corporate Owned Life Insurance Asset | 4,609 | 4,454
Mutual Funds Asset | 0 | 0
Deferred Compensation Liability | (8,554) | (10,599)
Recurring Basis | Significant Unobservable Inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Corporate Owned Life Insurance Asset | 0 | 0
Mutual Funds Asset | 0 | 0
Deferred Compensation Liability | 0 | 0
Recurring Basis | Interest Rate Swap |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest Rate Swap Liability | (37,559) | (53,975)
Recurring Basis | Interest Rate Swap | Quoted Prices in Active Markets for Identical Assets and Liabilities |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest Rate Swap Liability | 0 | 0
Recurring Basis | Interest Rate Swap | Significant Other Observable Inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest Rate Swap Liability | (37,559) | (53,975)
Recurring Basis | Interest Rate Swap | Significant Unobservable Inputs |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Interest Rate Swap Liability | $ 0 | $ 0

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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
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