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Share-Based Compensation - Stock Options Activity (Details) - Stock options - shares	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Stock Options
Options outstanding at beginning of period (in shares)	824,300	1,090,300
Granted (in shares)	0	0
Exercised (in shares)	(63,750)	(259,000)
Forfeited (in shares)	0	0
Options outstanding at end of period (in shares)	760,550	831,300
Options exercisable at end of period (in shares)	755,550	793,800

X

- 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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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- Definition

Net number of share options (or share units) granted during the period.

+ References

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-Publisher FASB
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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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Number of share options (or share units) exercised during the current period.

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