Mortgage Loan (Details) $ in Thousands									12 Months Ended
	Sep. 05, 2018 ft²	Mar. 29, 2018 USD ($) ft²	Jan. 30, 2018 USD ($) ft²	Sep. 22, 2017 USD ($) building	Aug. 30, 2017 USD ($)	Jul. 14, 2017 USD ($) ft²	Mar. 15, 2017 USD ($) ft² building	Nov. 17, 2016 USD ($) ft² derivative	Nov. 30, 2019 USD ($)	Nov. 30, 2018 USD ($) item	Nov. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)
Long-Term Debt
Loans, net of debt issuance costs										$ 145,052	$ 129,203
Debt disclosures
Ineffectiveness on cash flow hedges										0
Anticipated ineffectiveness on cash flow hedges										0
Deferred tax asset										1,556	1,904
Number of buildings used as collateral | building							2
Proceeds from issuance of debt										31,623	39,125	$ 45,525
Payment for termination of interest rate swap agreement											341
Payment on secured debt										$ 15,439	19,287	24,822
Funds placed in (returned from) escrow												(600)
Interest rate swap agreement
Debt disclosures
Number of agreements containing credit risk related contingent features | item										0
Recognized net losses (included in other comprehensive loss), before taxes, on interest rate swap agreements										$ 3,302	949	$ 1,081
Loss expected to be reclassified over next twelve months from accumulated other comprehensive loss to interest expense										(363)
Net fair value of interest rate swap agreements										3,101	201
Interest rate swap agreement | Other assets
Debt disclosures
Net fair value of interest rate swap agreements										3,157	644
Interest rate swap agreement | Other liabilities
Debt disclosures
Net fair value of interest rate swap agreements										$ 56	845
LIBOR
Debt disclosures
Variable interest rate margin (as a percent)										2.75%
Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 134,319	130,977
Debt issuance costs, net										(1,723)	(1,774)
Loans, net of debt issuance costs										132,596	$ 129,203
Annual principal payment requirements under the terms of the nonrecourse mortgage loans
2019										4,064
2020										7,400
2021										4,391
2022										8,438
2023										4,681
Debt disclosures
Aggregate book value of land and buildings pledged as collateral										169,105
Construction loan
Long-Term Debt
Loans, prior to debt issuance costs										12,842
Debt issuance costs, net										(386)
Loans, net of debt issuance costs										12,456
Interest rate (as a percent)		4.51%									4.51%
Debt disclosures
Construction loan with State Farm Life Insurance Company		$ 13,800
Area Of Building | ft²	54,000	234,000
Term of debt		15 years
Amortization period of debt		25 years
Increase in construction loan		$ 14,288
Lease term	12 years 6 months
Extended lease term	10 years
Agreement Term of Extension	5 years
3.91%, due January 27, 2020 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 3,345	$ 3,478
Interest rate (as a percent)										3.91%	3.91%
4.72%, due October 3, 2022
Long-Term Debt
Loans, prior to debt issuance costs				$ 4,375
Debt disclosures
Amortization period of debt				25 years
Number of buildings used as collateral | building				2
Fixed interest rate pursuant to interest rate swap agreement (as a percent)				4.72%
Cash on hand				$ 1,000
Payment on secured debt				1,501
Funds placed in (returned from) escrow				501
4.72%, due October 3, 2022 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 4,273	$ 4,367
Interest rate (as a percent)										4.72%	4.72%
4.39%, due January 2, 2025 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 19,674	$ 20,221
Interest rate (as a percent)										4.39%	4.39%
4.17%, due May 1, 2026 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 13,487	$ 13,844
Interest rate (as a percent)										4.17%	4.17%
3.79%, November 17, 2026 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 25,402	$ 26,076
Interest rate (as a percent)										3.79%	3.79%
4.39%, due August 1, 2027
Debt disclosures
Term of debt						10 years
Amortization period of debt						25 years
New mortgage						$ 10,600
Area of collateralized properties (in square feet) | ft²						304,000
Variable interest rate margin (as a percent)						2.05%
Fixed interest rate pursuant to interest rate swap agreement (as a percent)						4.39%
4.39%, due August 1, 2027 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 10,284	$ 10,523
Interest rate (as a percent)										4.39%	4.39%
3.97%, due September 1, 2027
Long-Term Debt
Loans, prior to debt issuance costs					$ 12,150
Interest rate (as a percent)					3.97%
Debt disclosures
Term of debt					10 years
3.97%, due September 1, 2027 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 11,898	$ 12,115
Interest rate (as a percent)										3.97%	3.97%
4.57%, due February 1, 2028
Long-Term Debt
Loans, prior to debt issuance costs			$ 11,781
Debt disclosures
Area of collateralized properties (in square feet) | ft²			137,000
Proceeds from issuance of debt			$ 7,000
Fixed interest rate pursuant to interest rate swap agreement (as a percent)			4.57%
4.57%, due February 1, 2028 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 18,482
Interest rate (as a percent)										4.57%	4.57%
5.09%, due July 1, 2029 GCD mortgage loan | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 6,172	$ 6,597
Interest rate (as a percent)										5.09%
5.09%, due July 1, 2029 TD mortgage Loan | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 4,324	$ 4,622
Interest rate (as a percent)										5.09%	5.09%
4.33%, due August 1, 2030 mortgage loan | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs										$ 16,978	$ 17,308
Interest rate (as a percent)										4.33%	4.33%
4.45%, due March 1, 2027 | Nonrecourse mortgage loans
Long-Term Debt
Loans, prior to debt issuance costs											$ 11,826
Interest rate (as a percent)											4.45%
Nonrecourse variable rate loans, due October 2, 2017
Long-Term Debt
Loans, prior to debt issuance costs				$ 5,876
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)				3.86%
Nonrecourse variable rate loans, due October 2, 2017 | LIBOR
Debt disclosures
Variable interest rate margin (as a percent)				2.75%
Nonrecourse variable rate loans, due February 1, 2019
Long-Term Debt
Loans, net of debt issuance costs						$ 10,120
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)						6.35%
Nonrecourse variable rate loans, due February 1, 2019 | Interest rate swap agreement
Debt disclosures
Recognized net losses (included in other comprehensive loss), before taxes, on interest rate swap agreements											$ 218
Deferred tax asset											123
Payment for termination of interest rate swap agreement											341
Interest expense										$ 211	$ 98
Nonrecourse variable rate loans, due February 1, 2019 | Interest rate swap agreement | Forecast
Debt disclosures
Interest expense									$ 32
Nonrecourse variable rate loans, due February 1, 2019 | LIBOR
Debt disclosures
Variable interest rate margin (as a percent)						2.75%
Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member]
Long-Term Debt
Loans, prior to debt issuance costs								$ 26,725
Debt disclosures
Term of debt								10 years
Amortization period of debt								25 years
Proceeds from issuance of debt								$ 13,000
Debt amount refinanced								$ 13,725
Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member] | First Collateralized Property
Debt disclosures
Area of collateralized properties (in square feet) | ft²								280,000
Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member] | Second Collateralized Property
Debt disclosures
Area of collateralized properties (in square feet) | ft²								252,000
Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member] | Interest rate swap agreement
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)								3.79%
Number of interest rate swap derivatives | derivative								2
Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member] | LIBOR
Debt disclosures
Variable interest rate margin (as a percent)								1.70%
2017 PUB Mortgage
Debt disclosures
Term of debt							10 years
Amortization period of debt							25 years
New mortgage							$ 12,000
Area of collateralized properties (in square feet) | ft²							275,000
2017 PUB Mortgage | LIBOR
Debt disclosures
Variable interest rate margin (as a percent)							1.95%