Fair Value Disclosures Fair Value Disclosures (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Disclosed at fair value:
Other Notes Payable	$ 53,381	$ 41,313
Debt Instrument, Fair Value Disclosure	3,098,665	2,857,830
Fair Value, Inputs, Level 1 [Member]
Disclosed at fair value:
Cash and equivalents (including restricted cash), fair value	1,251,456	1,133,700
Fair Value, Inputs, Level 2 [Member]
Disclosed at fair value:
Financial Services debt, fair value	326,573	348,412
Land [Member] | Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure	9,979	18,253
Residential Mortgage [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure	508,967	461,354
Interest Rate Lock Commitments [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure	8,202	9,035
Forward Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Measured at fair value on a recurring basis:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	1,073	(6,914)
Whole Loan Commitments [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Measured at fair value on a recurring basis:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(596)	(718)
Land Held For Sale [Member] | Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure	$ 4,193	$ 17,813