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Income Taxes - Reconciliation of Federal Statutory Income Tax Rate (Details) | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Income Tax Disclosure [Abstract] |  |
Federal statutory rate | 21.00% | 21.00%
State income taxes, net of Federal benefit | 5.20% | 6.10%
Excess tax benefits | (3.80%) | (2.70%)
Other | (0.90%) | (0.90%)
Effective tax rate | 21.50% | 23.50%
Expected effective income tax rate for the year | 25.00% |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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