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Long-term Debt - Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Credit Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Debt | $ 0 | $ 50,450
4.125% Senior Unsecured Notes Due 2029 |  |
Debt Instrument [Line Items] |  |
Debt | 400,000 | 0
4.875% Senior Unsecured Notes Due 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Debt | 0 | 300,000
Revolving Credit Facility [Member] | Credit Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Debt | 0 | 50,450
Fair Value, Inputs, Level 2 [Member] | 4.125% Senior Unsecured Notes Due 2029 |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Fair Value | 399,000 | 0
Fair Value, Inputs, Level 2 [Member] | 4.875% Senior Unsecured Notes Due 2025 [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Fair Value | 0 | 305,630
Fair Value, Inputs, Level 2 [Member] | Revolving Credit Facility [Member] | Credit Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Fair Value | $ 0 | $ 50,450

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- Definition Amount of short-term and long-term debt and lease obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
Name: | us-gaap_DebtAndCapitalLeaseObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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

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- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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