Summary Of Significant Accounting Policies - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Impairment loss	$ 0	$ 0	$ 0
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long-term debt	1,380,700,000	1,315,800,000
Increase (decrease) in stockholders' equity	4,206,900,000	4,058,000,000
Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) in stockholders' equity	3,699,000,000	3,732,600,000	3,684,400,000	$ 3,589,700,000
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) in stockholders' equity	$ 731,400,000	466,900,000	$ 126,400,000	$ 93,100,000
Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net deferred tax liability		18,600,000
Adjustment | Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) in stockholders' equity		(77,800,000)
Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) in stockholders' equity		21,400,000
Adjustment | Convertible Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long-term debt		$ 75,000,000