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Period Type:	duration

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256

+ Details

Name:	us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Net Income Per Share - Calculation of Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income	$ 166,206	$ 175,821	$ 168,239	$ 170,871	$ 149,213	$ 110,598	$ 510,266	$ 430,682
Basic:
Weighted average shares (in shares)	107,855			110,176			108,630	110,816
Diluted:
Weighted average shares (in shares)	107,855			110,176			108,630	110,816
Dilutive effect of potential common shares (in shares)	763			1,314			1,000	1,138
Diluted weighted average shares (in shares)	108,618			111,490			109,630	111,954
Net income per share:
Basic (in usd per share)	$ 1.54			$ 1.55			$ 4.70	$ 3.89
Diluted (in usd per share)	$ 1.53			$ 1.53			$ 4.65	$ 3.85