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Leases - Narrative (Details) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2019 USD ($) renewal_option | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 29, 2018
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating lease liability related to sale leaseback transactions |  | $ 36,800 |  |  |
Sale leaseback liabilities as a percentage of total operating lease liabilities |  | 97.00% |  |  |
Deferred income taxes |  | $ 790 | $ 253 |  |
Incremental borrowing late | 7.32% |  |  |  |
Right-of-use asset obtained in exchange for operating lease liability |  | $ 4,900 |  |  |
Initial term of operating lease | 20 years |  |  |  | 20 years
Number of renewal options | renewal_option | 2 |  |  |  |
Number of years in each renewal option | 10 years |  |  |  |
Escalator equal to the lessor | 125.00% |  |  |  |
Maximum rent escalator percentage | 2.00% |  |  |  |
Rent expense |  |  | 4,000 | $ 3,300 |
Accounting Standards Update 2016-02 |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Cumulative adjustment due to adoption of ASU |  |  | 4,623 |  |
Deferred income taxes | $ 1,300 |  |  |  |
Retained Earnings | Accounting Standards Update 2016-02 |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Cumulative adjustment due to adoption of ASU | $ 4,600 |  | $ 4,623 |  |

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