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Stock Options and Employee Stock Purchase Plan - Summarized Information Concerning Outstanding and Exercisable Options (Details) | 12 Months Ended
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Dec. 31, 2020 $ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Number outstanding (in shares) | shares | 475,601
Weighted average remaining contractual life | 6 years 1 month 24 days
Options outstanding, weighted average exercise price (in usd per share) | $ 69.61
Number exercisable (in shares) | shares | 175,601
Exercisable options, weighted average exercise price (in usd per share) | $ 60.35
Range One |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Rnage of exercise price (in usd per share) | $ 29.34
Number outstanding (in shares) | shares | 45,351
Weighted average remaining contractual life | 4 months 9 days
Options outstanding, weighted average exercise price (in usd per share) | $ 29.34
Number exercisable (in shares) | shares | 45,351
Exercisable options, weighted average exercise price (in usd per share) | $ 29.34
Range Two |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Rnage of exercise price (in usd per share) | $ 29.53
Number outstanding (in shares) | shares | 7,250
Weighted average remaining contractual life | 1 year 2 months 1 day
Options outstanding, weighted average exercise price (in usd per share) | $ 29.53
Number exercisable (in shares) | shares | 7,250
Exercisable options, weighted average exercise price (in usd per share) | $ 29.53
Range Three |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Rnage of exercise price (in usd per share) | $ 67.35
Number outstanding (in shares) | shares | 23,000
Weighted average remaining contractual life | 4 years 4 months 6 days
Options outstanding, weighted average exercise price (in usd per share) | $ 67.35
Number exercisable (in shares) | shares | 23,000
Exercisable options, weighted average exercise price (in usd per share) | $ 67.35
Range Four |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Rnage of exercise price (in usd per share) | $ 75.03
Number outstanding (in shares) | shares | 400,000
Weighted average remaining contractual life | 7 years
Options outstanding, weighted average exercise price (in usd per share) | $ 75.03
Number exercisable (in shares) | shares | 100,000
Exercisable options, weighted average exercise price (in usd per share) | $ 75.03

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- Definition Share based compensation shares authorized under stock option plans exercise price range. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + 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 (c)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + 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 (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + 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 (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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