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Leases (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Lessee, Lease, Description [Line Items] |  |  |
Total rent expense under operating leases |  | $ 7.7 | $ 7.1
Accumulated depreciation for capital leases |  | $ 8.6 |
Minimum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Length of potential lease renewal for operating leases | 1 year |  |
Length of potential lease renewal for finance leases | 1 year |  |
Maximum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Length of potential lease renewal for operating leases | 10 years |  |
Length of potential lease renewal for finance leases | 10 years |  |

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- Definition The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 2) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84164758&loc=d3e45014-112735 + Details
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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
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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- Definition Potential extension of original lease term under renewal terms. + References No definition available. + Details
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- Definition Potential extension of original lease term under renewal terms. + References No definition available. + Details
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- Details
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- Details
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