New Accounting Standards (Details) - USD ($)	Mar. 29, 2020	Jan. 01, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finance receivables	$ 7,627,903,000		$ 7,572,947,000	$ 7,629,464,000
Allowance for credit losses on finance receivables	335,496,000		198,581,000	190,872,000	$ 189,885,000
Deferred income taxes	127,856,000		101,204,000	132,988,000
Accrued Liabilities			582,288,000
Retained earnings	$ 2,126,646,000		$ 2,193,997,000	$ 2,074,669,000
Cumulative Effect, Period Of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finance receivables		$ 0
Allowance for credit losses on finance receivables		100,604,000
Deferred income taxes		22,484,000
Accrued Liabilities		109,000
Retained earnings		(78,229,000)
Cumulative Effect, Period Of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finance receivables		7,572,947,000
Allowance for credit losses on finance receivables		299,185,000
Deferred income taxes		123,688,000
Accrued Liabilities		582,397,000
Retained earnings		$ 2,115,768,000