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Stock Plans and Stock Based Compensation - Activity Related to Restricted Stock Awards (Details) | 12 Months Ended
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Dec. 31, 2021 $ / shares shares
Number of Shares |
Unvested, beginning of year (in shares) | shares | 254,989
Granted (in shares) | shares | 67,846
Vested (in shares) | shares | (71,907)
Forfeited (in shares) | shares | (9,018)
Unvested, end of year (in shares) | shares | 241,910
Weighted Average Grant Date Fair Value |
Beginning balance (in dollars per share) | $ / shares | $ 70.55
Granted (in dollars per share) | $ / shares | 83.97
Vested (in dollars per share) | $ / shares | 72.67
Forfeited (in dollars per share) | $ / shares | 70.10
Ending balance (in dollars per share) | $ / shares | $ 71.60

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- Definition The weighted average exercise price of share-based awards forfeited during the period. + References No definition available. + Details
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- Definition The weighted average exercise price of share-based awards granted during the period. + References No definition available. + Details
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- Definition The weighted average exercise price of nonvested share-based awards. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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