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Leases - Additional Information (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) RealEstate Location | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Lessee Lease Description [Line Items] |  |  |
Number of real estate leases | RealEstate | 27 |  |
Number of service center locations | Location | 244 |  |
Lessee, operating lease, option to renew, earliest year | 2021 |  |
Lessee, operating lease, option to renew, latest year | 2033 |  |
Operating lease, liability, current | $ 13.0 | $ 10.4 |
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:AccruedLiabilitiesCurrent | us-gaap:AccruedLiabilitiesCurrent |
Operating lease, liability, noncurrent | $ 93.3 | $ 56.1 |
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | us-gaap:OtherLiabilitiesNoncurrent | us-gaap:OtherLiabilitiesNoncurrent |
Operating lease, right-of-use asset | $ 104.4 | $ 65.3 |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | us-gaap:OtherAssetsNoncurrent | us-gaap:OtherAssetsNoncurrent |
Operating lease, weighted average remaining lease term | 9 years 4 months 24 days | 9 years 4 months 24 days |
Operating lease, weighted average discount rate, percent | 3.10% | 4.00% |
Cash paid for amounts included in the measurement of operating leases | $ 14.5 | $ 14.3 |
Operating lease, expense | 16.0 | 14.7 | $ 12.6
Right-of-use assets obtained in exchange for new operating lease liabilities | $ 51.1 | $ 8.3 |
Minimum [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Lessee, operating lease, renewal term | 1 year |  |
Maximum [Member] |  |  |
Lessee Lease Description [Line Items] |  |  |
Lessee, operating lease, renewal term | 10 years |  |

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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 Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
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