Stock-based Compensation (Summary of Stock Option Activity) (Details) - $ / shares	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021
Shares
Outstanding, beginning of period, Shares	1,230,211	1,282,278
Granted, Shares	140,339	178,040
Exercised, Shares	(262,900)	(223,426)
Forfeited or cancelled, Shares	(6,075)	(4,769)
Outstanding, end of period, Shares	1,101,575	1,232,123
Weighted Average Exercise Price
Outstanding, beginning of period, Weighted Average Exercise Price	$ 99.14	$ 93.64
Granted, Weighted Average Exercise Price	139.51	115.35
Exercised, Weighted Average Exercise Price	86.82	80.46
Forfeited or cancelled, Weighted Average Exercise Price	116.44	118.01
Outstanding, end of period, Weighted Average Exercise Price	$ 107.13	$ 99.07

For presentations that combine terminations, 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 or that expired.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Weighted average price of options that were either forfeited or expired.

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

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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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)(iv)(02)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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