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Summary of stock options outstanding (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 $ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Remaining life | 4 years 8 months 11 days
Shares exercisable | shares | 96,586
Weighted average exercise price | $ / shares | $ 37.26
Shares exercisable | shares | 104,755
Weighted average exercise price | $ / shares | $ 37.93
Remaining life | 4 years 9 months 17 days
Forty Four Point Thirty One To Forty Five Point Ninety Seven [Member] |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Shares exercisable, nonvested | shares | 8,169
Weighted average exercise price | $ / shares | $ 45.94
Remaining life, nonvested | 6 years 10 months 23 days
Shares exercisable | shares | 45,376
Weighted average exercise price | $ / shares | $ 45.19
Remaining life | 6 years 4 months 24 days
Nineteen Point Sixty Eight To Twenty Nine Point Fifty Two [Member] |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Shares exercisable | shares | 20,080
Weighted average exercise price | $ / shares | $ 22.66
Remaining life | 1 year 8 months 12 days
Twenty Nine Point Fifty Three To Forty Four Point Thirty [Member] |
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] |
Shares exercisable | shares | 31,130
Weighted average exercise price | $ / shares | $ 35.11
Remaining life | 4 years

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: 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 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 Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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