Debt (Narrative) (Details)		3 Months Ended
		Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2025 GBP (£)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Average borrowings outstanding		$ 789,100,000	$ 810,700,000
Weighted average interest rate		6.00%	6.40%
Interest expense, net		$ 79,777,000	$ 17,150,000
Interest expense		(82,277,000)	(19,328,000)
5.75% Unsecured Notes maturing in 2026 [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs		$ 800,000			$ 1,000,000.0
Interest rate		5.75%		5.75%	5.75%
Fair value of debt instrument		$ 401,000,000.0			$ 398,900,000
Five-Year Credit Agreement maturing in 2027 [Member]
Debt Instrument [Line Items]
Credit facility current borrowing capacity		300,000,000
Line of credit facility outstanding		184,719,000			62,836,000
USD revolving credit facility borrowings [Member]
Debt Instrument [Line Items]
Line of credit facility outstanding		120,000,000
GBP revolving credit facility borrowings [Member]
Debt Instrument [Line Items]
Line of credit facility outstanding | £				£ 50,000,000
Term Loan maturing in 2027 - $150 million [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs		500,000			500,000
Loans Payable to Bank	[1]	138,278,000			140,099,000
Real Estate Term Loan maturing in 2028 - $75.2 million [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs		100,000			100,000
Loans Payable to Bank	[2]	69,858,000			70,795,000
Capital Term Loan maturing in 2028 - $65 million [Member]
Debt Instrument [Line Items]
Unamortized debt issuance costs		600,000			600,000
Loans Payable to Bank	[3]	$ 55,189,000			$ 56,770,000
Secured Overnight Financing Rate (SOFR) [Member] | USD revolving credit facility borrowings [Member]
Debt Instrument [Line Items]
Applicable interest rate margin		1.375%
Sterling Overnight Interbank Average Rate (SONIA) [Member] | GBP revolving credit facility borrowings [Member]
Debt Instrument [Line Items]
Applicable interest rate margin		1.375%
Securities Subject to Mandatory Redemption [Member] | Graham Healthcare Group [Member]
Debt Instrument [Line Items]
Interest expense		$ 66,400,000	$ 1,900,000

[1] The carrying value is net of $0.5 million of unamortized debt issuance costs as of March 31, 2025 and December 31, 2024.

[2] The carrying value is net of $0.1 million of unamortized debt issuance costs as of March 31, 2025 and December 31, 2024.

[3] The carrying value is net of $0.6 million of unamortized debt issuance costs as of March 31, 2025 and December 31, 2024.