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Commitments And Contingencies (Tables)
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Summary of Changes in Loan Origination Liability hanges in these liabilities were as follows ($000's omitted): 
202020192018
Liabilities, beginning of period$25,159 $50,282 $34,641 
Reserves provided (released), net26,410 (225)16,130 
Payments(39,600)(24,898)(489)
Liabilities, end of period$11,969 $25,159 $50,282 
Summary of Changes in Warranty Liability Changes in warranty liabilities were as follows ($000’s omitted): 
202020192018
Warranty liabilities, beginning of period$91,389 $79,154 $72,709 
Reserves provided64,492 60,818 65,567 
Payments(70,869)(75,635)(64,525)
Other adjustments (a)
(2,268)27,052 5,403 
Warranty liabilities, end of period$82,744 $91,389 $79,154 
Summary of Changes in Self-insurance Liability Changes in these liabilities were as follows ($000's omitted):
202020192018
Balance, beginning of period$709,798 $737,013 $758,812 
Reserves provided83,912 83,209 93,156 
Adjustments to previously recorded reserves(93,431)(49,437)(35,873)
Payments, net (a)
(58,500)(60,987)(79,082)
Balance, end of period$641,779 $709,798 $737,013 
Schedule of Future Minimum Lease Payments Required Under Leases The future minimum lease payments required under our leases as of December 31, 2020 were as follows ($000's omitted):
Years Ending December 31,
2021$21,154 
202222,412 
202320,334 
202414,032 
20259,303 
Thereafter19,432 
Total lease payments (a)
106,667 
Less: Interest (b)
15,302 
Present value of lease liabilities (c)
$91,365 

(a)     Lease payments include options to extend lease terms that are reasonably certain of being exercised and exclude $1.7 million of legally binding minimum lease payments for leases signed but not yet commenced at December 31, 2020.
(b)     Our leases do not provide a readily determinable implicit rate. Therefore, we must estimate our discount rate for such leases to determine the present value of lease payments at the lease commencement date.
(c)     The weighted average remaining lease term and weighted average discount rate used in calculating our lease liabilities were 5.4 years and 5.4%, respectively, at December 31, 2020.