Variable Interest Entities (Narrative) (Details) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jan. 31, 2019	May 31, 2020 USD ($)	May 31, 2020 USD ($) entity joint_venture	May 31, 2019 USD ($)	Nov. 30, 2019 USD ($)
Variable Interest Entity [Line Items]
Financial Services gain on deconsolidation			$ 61,418	$ 0
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Change in consolidated inventory not owned			86,700
Variable Interest Entity, Not Primary Beneficiary Including Third Parties
Variable Interest Entity [Line Items]
Non-refundable option deposits and pre-aquisition costs		$ 282,100	$ 282,100		$ 320,500
Segments Other Than Financial Services
Variable Interest Entity [Line Items]
Number of entities consolidated | entity			1
VIE assets consolidated			$ 49,400
VIE liabilities consolidated			$ 900
Number of entities deconsolidated | joint_venture			2
VIE assets deconsolidated			$ 37,200
Financial Services
Variable Interest Entity [Line Items]
Number of entities deconsolidated | joint_venture			1
VIE assets deconsolidated			$ 291,200
VIE liabilities deconsolidated			204,100
Financial Services gain on deconsolidation		$ 61,418	61,418
Financial Services | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Reduction in principal amount of debt owed to company		43.00%
Financial Services | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Fair value of equity investment and note receivable		$ 123,400	123,400
Fair value of equity investment		$ 70,800	$ 70,800
Financial Services | Variable Interest Entity, Not Primary Beneficiary | Discount rate | Minimum
Variable Interest Entity [Line Items]
Equity investment and note recievable, measurement input		0.16	0.16
Financial Services | Variable Interest Entity, Not Primary Beneficiary | Discount rate | Maximum
Variable Interest Entity [Line Items]
Equity investment and note recievable, measurement input		0.30	0.30
Financial Services | Preferred Stock | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Percentage of stock owned	20.00%
Reduction in ownershp percentage		20.00%
Financial Standby Letters of Credit | Variable Interest Entity, Not Primary Beneficiary Including Third Parties
Variable Interest Entity [Line Items]
Letters of credit outstanding		$ 72,500	$ 72,500		$ 75,000