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Balance Sheet Components - Narrative (Details) - USD ($)		3 Months Ended			4 Months Ended	7 Months Ended	9 Months Ended
	Feb. 18, 2026	Sep. 30, 2026	Mar. 31, 2026	Sep. 30, 2025	Dec. 31, 2025	Sep. 30, 2026	Sep. 30, 2026	Sep. 30, 2025	Feb. 28, 2026
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Depreciation expense		$ 1,100,000		$ 700,000			$ 2,600,000	$ 1,500,000
Depreciation and amortization							$ 29,232,000	18,686,000
Stock repurchased and retired during period, (in shares)		0					8,300,000
Stock repurchased and retired during period, value							$ 109,700,000
Shares acquired, average cost per share (in dollars per share)							$ 13.24
Internal-use software and platform development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Internal-use software and platform development costs		$ 9,600,000		6,300,000			$ 30,100,000	16,700,000
Depreciation and amortization		7,300,000		3,800,000			17,900,000	10,200,000
2025 Share Repurchase Authorization
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount				$ 100,000,000.0				$ 100,000,000.0
Stock repurchased and retired during period, (in shares)			4,600,000		2,100,000
Stock repurchased and retired during period, value			$ 64,000,000.0		$ 36,000,000.0
Shares acquired, average cost per share (in dollars per share)			$ 14.00		$ 17.33
Stock repurchase program, remaining authorized repurchase amount		0				$ 0	0
2026 Share Repurchase Authorization
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, authorized amount									$ 300,000,000.0
Stock repurchased and retired during period, (in shares)						3,700,000
Stock repurchased and retired during period, value						$ 45,700,000
Shares acquired, average cost per share (in dollars per share)						$ 12.31
Stock repurchase program, remaining authorized repurchase amount		$ 254,300,000				$ 254,300,000	$ 254,300,000
Performance Shares \| 2018 Employee Incentive Plan - PSU Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award performance period (in years)	24 months
Share-based compensation arrangement by share-based payment award, award requisite service period (in months)	36 months
Performance Shares \| 2018 Employee Incentive Plan - PSU Award \| Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage (as percent)	50.00%
Share-based compensation arrangement by share-based payment award, award performance period (in years)	2 years
Performance Shares \| 2018 Employee Incentive Plan - PSU Award \| Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage (as percent)	50.00%
Share-based compensation arrangement by share-based payment award, award performance period (in years)	3 years