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v3.19.3.a.u2

Significant Accounting Policies - Off-balance Sheet Arrangements (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Feb. 05, 2020 | Dec. 31, 2018
Obligation with Joint and Several Liability Arrangement [Line Items] |  |  |
Increase in authorized shares under the repurchase program | 389,938 |  |
Standby letters of credit |  |  |
Obligation with Joint and Several Liability Arrangement [Line Items] |  |  |
Term of debt instrument | 1 year |  |
Liabilities for potential obligations | $ 0.0 |  | $ 0.0
Subsequent event |  |  |
Obligation with Joint and Several Liability Arrangement [Line Items] |  |  |
Increase in authorized shares under the repurchase program |  | 2,000,000 |

X
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