Summary of Significant Accounting Policies (Narrative) (Details)		1 Months Ended	24 Months Ended
	Sep. 16, 2021 USD ($)	Oct. 31, 2021 USD ($) a	Sep. 30, 2021 USD ($) hospitalityAssets	Jun. 30, 2020 hotel	Oct. 31, 2019 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of hospitality assets sale | hospitalityAssets			3
Amortized cost basis of financing receivables			$ 482,600,000
Accrued interest on financing receivables			$ 21,000,000
Financing receivable threshold period past due			30 days
2019 Repurchase Program
Financing Receivable, Allowance for Credit Loss [Line Items]
Stock repurchase program, authorized amount					$ 100,000,000
Shares repurchased, value			$ 53,900,000
The Woodlands
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of hotel closed | hotel				3
Subsequent Event | 2021 Repurchase Program
Financing Receivable, Allowance for Credit Loss [Line Items]
Stock repurchase program, authorized amount		$ 250,000,000
Subsequent Event | Douglas Ranch Acquisition
Financing Receivable, Allowance for Credit Loss [Line Items]
Property re-acquire, interest, percentage		50.00%
Property re-acquire, purchase price		$ 33,800,000
Subsequent Event | Trillium Development Holding Company, LLC
Financing Receivable, Allowance for Credit Loss [Line Items]
Purchase price		$ 59,000,000
Acquisition interest		50.00%
Buckeye in West Valley of Phoenix, Arizona | Subsequent Event | Trillium Development Holding Company, LLC
Financing Receivable, Allowance for Credit Loss [Line Items]
Area of land | a		3,029
Buckeye in West Valley of Phoenix, Arizona | Subsequent Event | Douglas Ranch Acquisition
Financing Receivable, Allowance for Credit Loss [Line Items]
Area of land | a		33,810
Purchase price		$ 541,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Hotel
Financing Receivable, Allowance for Credit Loss [Line Items]
Consideration received	$ 252,000,000
Gain on disposal	$ 39,100,000