Fair Value Disclosures (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Disclosed at fair value:
Other notes payable	$ 28,938	$ 41,313
Level 2
Disclosed at fair value:
Financial Services debt	234,186	348,412
Senior notes payable	2,913,772	2,857,830
Level 1
Disclosed at fair value:
Cash, cash equivalents, and restricted cash	659,274	1,133,700
Fair Value, Measurements, Recurring | Residential mortgage loans available-for-sale | Level 2
Measured at fair value on a recurring basis:
Assets, fair value	343,732	461,354
Measured at fair value on a non-recurring basis:
Assets, fair value	343,732	461,354
Fair Value, Measurements, Recurring | Interest rate lock commitments | Level 2
Measured at fair value on a recurring basis:
Assets, fair value	11,032	9,035
Measured at fair value on a non-recurring basis:
Assets, fair value	11,032	9,035
Fair Value, Measurements, Recurring | Forward contracts | Level 2
Measured at fair value on a recurring basis:
Liabilities, fair value	(3,732)	(6,914)
Fair Value, Measurements, Recurring | Whole loan commitments | Level 2
Measured at fair value on a recurring basis:
Liabilities, fair value	308	(718)
Fair Value, Measurements, Nonrecurring | Land held for sale | Level 2
Measured at fair value on a recurring basis:
Assets, fair value	6,185	17,813
Measured at fair value on a non-recurring basis:
Assets, fair value	6,185	17,813
Fair Value, Measurements, Nonrecurring | House and land inventory | Level 3
Measured at fair value on a recurring basis:
Assets, fair value	0	18,253
Measured at fair value on a non-recurring basis:
Assets, fair value	$ 0	$ 18,253