Debt Debt, Textuals (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	3.70%	3.62%
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	79.00%	66.00%
Line of Credit Facility, Amount Outstanding	$ 155,000,000	$ 525,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	100000.00%
Letters of Credit, Maximum Borrowing Capacity	$ 34,000,000	34,000,000
Line of Credit Facility, Remaining Borrowing Capacity	811,000,000.0
Repayments of Other Debt	3,700,000	2,000,000
Repayments of Debt	736,000,000	1,406,400,000
Losses on early extinguishment of debt, net	5,226,000	18,428,000	$ 16,637,000
Pledged Assets Separately Reported, Finance Receivables Pledged as Collateral, at Fair Value	400,000	2,000,000
Pledged Assets, Other, Not Separately Reported on Statement of Financial Position	1,100,000	1,200,000
Long-term Debt, Fair Value	3,987,696,000	3,836,715,000
Debt Issuance Costs, Line of Credit Arrangements, Net	13,600,000	14.5
Repayments of Long-term Debt	36,158,000	34,489,000	$ 25,471,000
Redemption Premium	4,800,000	16,100,000
Proceeds from Issuance of Debt	975,000,000	1,585,000,000
Repayments of Lines of Credit	$ 545,000,000.0	505,000,000.0
Document Period End Date	Dec. 31, 2021
April 2027 [Member]
Debt Instrument [Line Items]
Repayments of Debt		800,000
Term Loan December 2022 [Member]
Debt Instrument [Line Items]
Notes Payable to Bank, Noncurrent		601,250,000
May 2024 [Member]
Debt Instrument [Line Items]
Notes Payable to Bank, Noncurrent	$ 568,750,000
Line of Credit Facility, Amount Outstanding	155,000,000	525,000,000
Debt Instrument, Periodic Payment	32,500,000	32,500,000
Proceeds from Lines of Credit	175,000,000	735,000,000.0
August 2030 [Member]
Debt Instrument [Line Items]
Senior Notes		850,000,000.0
Unsecured Debt [Member] | November 2021 [Member]
Debt Instrument [Line Items]
Senior Notes	0	150,000,000
Unsecured Debt [Member] | April 2027 [Member]
Debt Instrument [Line Items]
Senior Notes	152,710,000	152,710,000
Unsecured Debt [Member] | December 2027 [Member]
Debt Instrument [Line Items]
Senior Notes	550,000,000	550,000,000
Unsecured Debt [Member] | August 2030 [Member]
Debt Instrument [Line Items]
Senior Notes	850,000,000	850,000,000
Unsecured Debt [Member] | June 2029 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 750,000,000	$ 750,000,000