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Stock Incentive Plans - Additional Information (Details) - $ / shares | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Weighted-average grant date fair value of options | $ 38.65 | $ 30.70

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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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