Stock-Based Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	27,243,247		27,243,247		24,996,827
Weighted average grant date fair value (in dollars per share)	$ 17.79		$ 16.11
Aggregate intrinsic value	$ 13,000		$ 25,200
Stock-based compensation costs related to unvested stock options	38,400		38,400
Stock-based compensation expense	$ 7,912	$ 2,253	$ 14,466	$ 4,745
2025 Performance Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	17,346,193		17,346,193
Annual increase in common stock available for issuance			5.00%
2025 Employee Stock Purchase Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	1,233,964		1,233,964
Annual increase in common stock available for issuance			1.00%
Purchase price of common stock as percentage of fair market value			85.00%
Tranche Two Through Thirty-Seven [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting, percentage			0.02083%
Tranche One Through Forty-Eight [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			4 years
Options to Purchase Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	9,716,691		9,716,691		10,003,254
Share-based payment award, expiration period (in years)			10 years
Vesting period			4 years
Weighted-average period (in years)			3 years 21 days
Options to Purchase Common Stock [Member] | Tranche One Through Thirty-Seven [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			4 years
Options to Purchase Common Stock [Member] | Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting, percentage			25.00%
Incentive Stock Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Threshold of voting power in company that triggers increase in minimum exercise price of share based payment awards			10.00%
Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock reserved for issuance (in shares)	1,836,862		1,836,862		907,703
Vesting period			4 years
Weighted-average period (in years)			3 years 6 months 14 days
Unrecognized compensation costs	$ 43,100		$ 43,100
ESPP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted-average period (in years)			2 months 8 days
Unrecognized compensation costs	$ 466,000,000		$ 466,000,000
Minimum [Member] | Options to Purchase Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, purchase price of common stock, percentage			100.00%
Maximum [Member] | Incentive Stock Options [Member] | Employee Who Owns More Than Ten Percent Of Voting Power Of All Classes Of Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-based payment award, purchase price of common stock, percentage			110.00%