Notes Payable and Derivatives (Narrative) (Details) - USD ($)	1 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2024	May 31, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Derivative [Line Items]
Amortization of interest rate hedges			$ (610,000)	$ (616,000)	$ (1,242,000)	$ (1,223,000)
Accrued interest payable	$ 30,931,000		30,931,000		30,931,000		$ 34,374,000
Amortization of debt costs					3,088,000	2,401,000
Interest rate cash flow hedge gain (loss) to be reclassified over next 12 months, net	1,840,000		1,840,000		1,840,000
Notes Payable 2034 Member
Derivative [Line Items]
Aggregate principal amount issued		$ 500,000,000
Debt interest rate percantage		5.50%
Accrued interest payable	493,840,000		493,840,000		493,840,000
Debt amortized interest expense					6,160,000
Debt issuance costs	$ 4,450,000		$ 4,450,000		$ 4,450,000
Debt note discount percentage					5.662%
Net proceeds from debt issuance cost					$ 489,390,000
Loans Payable
Derivative [Line Items]
Debt interest rate percantage	3.90%		3.90%		3.90%
Notes payable redeemed	$ 350,000,000
Debt issuance costs	$ 43,820,000		$ 43,820,000		$ 43,820,000		$ 42,595,000
Redemption price percentage	100.00%
Loans Payable | Notes Payable 2034 Member
Derivative [Line Items]
Redemption price percentage		100.00%
AOCI, cash flow hedges
Derivative [Line Items]
Amortization of interest rate hedges					8,869,000
Accumulated Other Comprehensive Income (Loss)
Derivative [Line Items]
Amortization of interest rate hedges			$ (610,000)	$ (616,000)	$ (1,242,000)	$ (1,223,000)