Other Assets and Accrued and Other Liabilities (Other Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Assets and Accrued and Other Liabilities [Abstract]
Self-insurance liabilities	$ 758,812	$ 831,058	$ 924,563	$ 995,692
Compensation-related	134,008	123,730
Warranty	72,709	66,134	61,179	65,389
Accrued interest	50,620	50,793
Loan origination liabilities	34,641	35,114	$ 46,381	$ 58,222
Other	305,543	322,883
Accrued and other liabilities	$ 1,356,333	$ 1,429,712