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Subsequent Event - Narrative (Details) - USD ($) |  | 9 Months Ended
--- | --- | ---
Oct. 24, 2018 | Sep. 30, 2018
Subsequent Event [Line Items] |  |
Leverage ratio |  | 161.00%
Subsequent Event | 2018 Credit Agreement |  |
Subsequent Event [Line Items] |  |
Financial covenants leverage ratio step up | 400.00% |
Minimum amount for material acquisition | $ 50,000,000 |
Annual share repurchase limit on leverage ratio basis | $ 20,000,000 |
Leverage ratio required for dividend or share activity | 275.00% |
Maximum additional dividend permitted annually on leverage ratio basis | $ 15,000,000 |
Subsequent Event | 2018 Credit Agreement | Minimum |  |
Subsequent Event [Line Items] |  |
Interest coverage ratio | 300.00% |
Leverage ratio | 350.00% |
Subsequent Event | 2018 Credit Agreement | Revolving Credit Facility |  |
Subsequent Event [Line Items] |  |
Borrowing capacity on line of credit | $ 450,000,000 |
Additional borrowing capacity on line of credit | $ 250,000,000 |

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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Definition Annual share repurchase limit on leverage ratio basis. + References No definition available. + Details
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- Definition Debt covenant interest coverage ratio. + References No definition available. + Details
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- Definition Debt covenant leverage ratio. + References No definition available. + Details
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- Definition Debt Covenant, Leverage Ratio Required for Dividend or Share Activity, Maximum + References No definition available. + Details
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- Definition Debt covenant leverage ratio step up. + References No definition available. + Details
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- Definition Line of Credit Facility, Additional Borrowing Capacity + References No definition available. + Details
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- Definition Maximum additional dividend permitted annually on leverage ratio basis. + References No definition available. + Details
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- Definition Minimum amount for material acquisition. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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