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v3.20.4

Employee Benefit Plans (Employee Benefits Charged To Operating Expenses) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Total employee benefits | $ 76,900 | $ 76,058 | $ 71,297
Payroll Taxes [Member] |  |  |
Total employee benefits | 27,664 | 26,959 | 25,712
Medical Plans [Member] |  |  |
Total employee benefits | 30,002 | 29,635 | 27,030
401K Plan [Member] |  |  |
Total employee benefits | 16,834 | 15,810 | 14,986
Pension Plans [Member] |  |  |
Total employee benefits | 410 | 605 | 651
Other [Member] |  |  |
Total employee benefits | $ 1,990 | $ 3,049 | $ 2,918

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- Definition Amount of expense for employee benefit and equity-based compensation. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |