Senior Notes, Loans Payable and Mortgage Repurchase Facilities - Narrative (Details)			1 Months Ended		3 Months Ended			9 Months Ended
	May 15, 2024	Dec. 15, 2023 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2017 USD ($)	Sep. 30, 2024 USD ($) loan	May 31, 2024 USD ($) agreement	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) loan	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) loan
Debt Instrument
Deferred loan costs—loans payable					$ 3,996,000			$ 3,996,000		$ 5,089,000
Accrued interest					14,860,000			14,860,000		8,470,000
Loans payable					$ 275,914,000			$ 275,914,000		$ 288,337,000
Number of seller-financed loans | loan					2			2		2
Mortgage repurchase facilities					$ 75,465,000			$ 75,465,000		$ 0
Interest incurred					25,253,000		$ 36,919,000	91,787,000	$ 111,792,000
Amortization of deferred financing costs					610,000		$ 1,300,000	3,100,000	$ 3,800,000
Mortgage repurchase facilities
Debt Instrument
Maximum borrowing capacity under facility					280,000,000	$ 380,000,000		280,000,000
Line of credit facility, current borrowing capacity					204,500,000			204,500,000
Number of master repurchase agreements | agreement						3
Mortgage repurchase facilities					$ 75,465,000			$ 75,465,000
Repurchase agreement weighted average interest rate					6.90%			6.90%
Senior notes
Debt Instrument
Deferred loan costs—loans payable					$ 3,700,000			$ 3,700,000		5,200,000
Accrued interest					11,100,000			11,100,000		3,200,000
Seller financed loans
Debt Instrument
Loans payable					$ 25,914,000			$ 25,914,000		$ 38,337,000
Seller financed loans | Seller-Financed Loans, Seller One
Debt Instrument
Interest rate on senior note (percent)					4.50%			4.50%		4.50%
Loans payable					$ 25,500,000			$ 25,500,000		$ 37,400,000
Second Seller Financed Loan | Seller-Financed Loans, Seller Two
Debt Instrument
Loans payable					$ 420,000			$ 420,000		$ 910,000
5.700% Senior Notes due June 15, 2028 | Senior notes
Debt Instrument
Aggregate principal amount			$ 350,000,000
Interest rate on senior note (percent)			5.70%		5.70%			5.70%		5.70%
Debt issuance, percentage of aggregate principal (percent)			100.00%
Proceeds from issuance of senior notes, net			$ 345,200,000
5.250% Senior Notes due June 1, 2027 | Senior notes
Debt Instrument
Aggregate principal amount				$ 300,000,000
Interest rate on senior note (percent)				5.25%	5.25%			5.25%		5.25%
Debt issuance, percentage of aggregate principal (percent)				100.00%
Proceeds from issuance of senior notes, net				$ 296,300,000
5.875% Senior Notes due June 15, 2024 | Senior notes
Debt Instrument
Aggregate principal amount				$ 450,000,000
Interest rate on senior note (percent)				5.875%	5.875%			5.875%		5.875%
Debt issuance, percentage of aggregate principal (percent)	100.00%
Proceeds from issuance of senior notes, net				$ 429,000,000.0
Notes issue price as a percentage of principal amount				98.15%
Amended Revolving Credit Facility
Debt Instrument
Line of credit facility, potential maximum borrowing capacity under specified conditions		$ 1,200,000,000
Amended Revolving Credit Facility | Revolving Credit Facility
Debt Instrument
Deferred loan costs—loans payable					$ 4,000,000.0			$ 4,000,000.0
Accrued interest					1,800,000			1,800,000		$ 1,600,000
Maximum borrowing capacity under facility		$ 750,000,000
Loans payable					0			0
Line of credit facility, current borrowing capacity					698,100,000			698,100,000
Amended Revolving Credit Facility | Revolving Credit Facility | Minimum
Debt Instrument
Debt instrument variable interest rate (percent)		1.25%
Amended Revolving Credit Facility | Revolving Credit Facility | Maximum
Debt Instrument
Debt instrument variable interest rate (percent)		1.90%
Amended Revolving Credit Facility | Letters of Credit
Debt Instrument
Outstanding letters of credit					51,900,000			51,900,000		52,300,000
Term loan facility | Term loan facility
Debt Instrument
Maximum borrowing capacity under facility		$ 250,000,000
Loans payable					$ 250,000,000			$ 250,000,000		$ 250,000,000
Interest rate of outstanding debt (percent)					5.93%			5.93%
Term loan facility | Term loan facility | Minimum
Debt Instrument
Debt instrument variable interest rate (percent)		1.10%
Term loan facility | Term loan facility | Maximum
Debt Instrument
Debt instrument variable interest rate (percent)		1.85%
Revolving Facility and Term Loan Facility
Debt Instrument
Consolidated tangible net worth attributed to Company required under covenants (percent)					95.00%			95.00%