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Compensation Plans: Stock Based (Details) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	May 22, 2025 shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($)	Dec. 31, 2024 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized	2,000,000
Shares available for grant		2,500,000		2,500,000
Performance Shares (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Multiplier applied to PSU awards at settlement		0.28		0.28
Award Vesting Period				3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				374,692
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Total Fair Value | $				$ 10.3
Stock-based compensation expense | $		$ 1.8	$ 1.1	4.7	$ 3.5
Unrecognized stock based compensation expense | $		$ 15.6		$ 15.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		819,605		819,605		694,366
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ / shares		$ 32.27		$ 32.27		$ 32.99
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares				$ 27.45
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				(49,922)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $ / shares				$ 30.02
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period				(199,531)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value | $ / shares				$ 31.01
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Multiplier Assumed		1		1
Shares Withheld for Tax Withholding Obligation				26,397
Shares Issued in Period				39,475
Performance Shares (PSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Multiplier applied to PSU awards at settlement		0		0
Performance Shares (PSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Multiplier applied to PSU awards at settlement		2		2
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				981,046
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Total Fair Value | $				$ 25.8
Stock-based compensation expense | $		$ 5.1	$ 4.5	14.2	$ 12.0
Unrecognized stock based compensation expense | $		$ 37.9		$ 37.9
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		1,432,861		1,432,861		1,039,837
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ / shares		$ 30.73		$ 30.73		$ 37.87
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares				$ 26.34
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period				(486,768)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | $ / shares				$ 36.39
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period				(101,254)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value | $ / shares				$ 34.38
Shares Withheld for Tax Withholding Obligation				161,787
Shares Issued in Period				324,981
Number of shares represented by each RSU		1		1

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Number of shares issued under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-4

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