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Leases - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2019 | Jan. 01, 2019 | Jan. 01, 2018 | Jan. 01, 2017
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | $ 1,582 | $ 274 | $ 0
Rent expense | $ 12,600 | $ 12,000 |  |  |  |
Minimum |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Lease renewal term |  |  | 1 month |  |  |
Maximum |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Lease renewal term |  |  | 15 years |  |  |
Retained Earnings |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | 1,582 | $ 624 | $ 254
Accounting Standards Update 2016-02 | Retained Earnings |  |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption |  |  |  | $ 1,600 |  |

X
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + 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=77888426&loc=SL77918673-209980 + Details
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