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Income Taxes (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Income Tax Disclosure [Abstract] |  |  |  |
Provision for income taxes | $ 31,441,000 | $ 29,615,000 | $ 58,174,000 | $ 60,789,000
Effective tax rate | 21.70% | 21.70% | 20.70% | 22.80%
Minimum |  |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |  |
Increase in unrecognized tax benefits is reasonably possible | $ 0 |  | $ 0 |
Maximum |  |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] |  |  |  |
Increase in unrecognized tax benefits is reasonably possible | $ 800,000 |  | $ 800,000 |

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