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Debt - Covenant Ratios (Details) $ in Thousands | Dec. 31, 2019 USD ($) | Dec. 31, 2018
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Credit Agreement |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding | $ 35,251 |
Net total lease adjusted leverage ratio | 5.7 | 5.6
Net secured debt lease adjusted leverage ratio | 2.3 | 2.6
Bond leverage ratio (not lease adjusted) | 5.9 | 5.8
Fixed charge coverage ratio | 2.2 | 2.2
Credit Agreement | Maximum |  |
Debt Instrument [Line Items] |  |
Net total lease adjusted leverage ratio | 6.5 |
Net secured debt lease adjusted leverage ratio | 4.0 |
Bond leverage ratio (not lease adjusted) | 7.0 |
Credit Agreement | Minimum |  |
Debt Instrument [Line Items] |  |
Bond leverage ratio (not lease adjusted) | 6.5 |
Fixed charge coverage ratio | 1.5 |
Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding | $ 4,853 |
Senior And Senior Subordinated Notes |  |
Debt Instrument [Line Items] |  |
Maximum allowable leverage ratio under indentures pertaining to senior and senior subordinated notes | 6.5 |
GBP Notes due 2025, Senior Notes 4.785 due 2027, Senior Notes 5.25 Notes and Senior Notes 4.785 due 2029 |  |
Debt Instrument [Line Items] |  |
Maximum allowable leverage ratio under indentures pertaining to senior and senior subordinated notes | 7.0 |

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- Definition Debt Instrument Covenant, Indenture, Leverage Ratio Maximum + References No definition available. + Details
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- Definition The bond leverage ratio, per the indentures, at the end of the reporting period. + References No definition available. + Details
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- Definition Revolving credit and term leverage ratio at the end of the reporting period. + References No definition available. + Details
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- Definition Represents the entity's revolving credit and term loan fixed charge coverage ratio at the end of the reporting period. + References No definition available. + Details
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- Definition Represents the entity's revolving credit and term loan, net secured debt lease adjusted leverage ratio at the end of the reporting period. + References No definition available. + Details
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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
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Details
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