Restructuring Charges (Components of Restructuring Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		18 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025
Restructuring Cost and Reserve [Line Items]
Severance	$ 1,797	$ 30,403	$ 15,607	$ 63,345
Facilities and other	39	291	1,435	1,514
Total	1,836	30,694	17,042	64,859
Continuing Operations
Restructuring Cost and Reserve [Line Items]
Total				64,859
2025 Plan
Restructuring Cost and Reserve [Line Items]
Severance	1,797		1,797
Facilities and other	39		39
Total	1,836		1,836
2024 Plan
Restructuring Cost and Reserve [Line Items]
Severance	0		13,810
Facilities and other	0		1,396
Total	$ 0		$ 15,206		$ 89,000
2024 Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Severance		30,403		53,947
Facilities and other		291		291
Total		30,694		54,238
2023 Plan | Continuing Operations
Restructuring Cost and Reserve [Line Items]
Severance		0		9,398
Facilities and other		0		1,223
Total		$ 0		$ 10,621