Mortgage Loan (Details) $ in Thousands													3 Months Ended		12 Months Ended
	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	Apr. 26, 2016 USD ($) ft² building	Dec. 11, 2015 USD ($) derivative	Dec. 10, 2015 USD ($)	Sep. 01, 2015 USD ($) ft² subsidiary	Jul. 29, 2015 USD ($) ft² building	Dec. 31, 2014 USD ($) ft² subsidiary	May 31, 2016 USD ($)	Nov. 30, 2015 USD ($) ft²	Nov. 30, 2019 USD ($)	Nov. 30, 2018 USD ($)	Nov. 30, 2017 USD ($) item	Nov. 30, 2016 USD ($)	Nov. 30, 2015 USD ($) ft²
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	$ 130,977	$ 111,139
Debt issuance costs, net																	(1,774)	(1,442)
Mortgage loans, net																	129,203	109,697
Debt disclosures
Other assets																	18,393	18,698
Number of buildings used as collateral | building					2
Payment for termination of interest rate swap agreement																	341
Payment on secured debt																	19,287	24,822	$ 20,123
Proceeds from issuance of debt																	39,125	45,525	40,391
Funds placed in (returned from) escrow																		(600)	$ 600
Ineffectiveness on cash flow hedges																	0
Anticipated ineffectiveness on cash flow hedges																	0
Deferred tax asset																	1,904	4,984
Nonrecourse variable rate loans, due January 27, 2020
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	3,478	3,606
Nonrecourse variable rate loans, due October 3, 2022
Long-Term Debt
Mortgage loans, prior to debt issuance costs		$ 4,375															4,367
Debt disclosures
Number of buildings used as collateral | building		2
Fixed interest rate pursuant to interest rate swap agreement (as a percent)		4.72%
Payment on secured debt		$ 1,501
Cash on hand		1,000
Funds placed in (returned from) escrow		$ 501
Amortization period of debt		25 years
Nonrecourse variable rate loans, due January 2, 2025
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	20,221	20,744
Debt disclosures
Proceeds from issuance of debt								$ 1,850				$ 10,891
Term of debt												10 years
Amortization period of debt												25 years
Number of subsidiaries which are party to the mortgage | subsidiary												2
Debt amount refinanced												$ 8,859
Nonrecourse variable rate mortgage, due May 1, 2026
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	13,844	14,187
Debt disclosures
New mortgage							$ 14,350
Number of buildings used as collateral | building							4
Proceeds from issuance of debt							$ 6,932
Term of debt							10 years
Amortization period of debt							25 years
Additional area serving as collateral | ft²							98,000
Nonrecourse variable rate mortgage, due November 17, 2026
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	26,076	26,725
Nonrecourse variable rate mortgage, due March 1, 2027
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	11,826
Nonrecourse variable rate mortgage, due August 1, 2027
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	10,523
Debt disclosures
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%
Term of debt				10 years
Amortization period of debt				25 years
3.97%, due September 1, 2027
Long-Term Debt
Mortgage loans, prior to debt issuance costs			$ 12,150														12,115
Interest rate (as a percent)			3.97%
Debt disclosures
Term of debt			10 years
5.09%, due July 1, 2029 GCD mortgage loan
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	$ 6,597	7,001
Interest rate (as a percent)																	4.33%
5.09%, due July 1, 2029 TD mortgage Loan
Long-Term Debt
Mortgage loans, prior to debt issuance costs																	$ 4,622	4,905
4.33%, due August 1, 2030 mortgage loan
Long-Term Debt
Mortgage loans, prior to debt issuance costs											$ 18,000						$ 17,308	17,624
Interest rate (as a percent)																	4.33%
Debt disclosures
Number of buildings used as collateral | building											3
Proceeds from issuance of debt											$ 14,875
Funds placed in (returned from) escrow											$ 3,125			$ (2,500)
Term of debt											15 years
Amortization period of debt											30 years
Nonrecourse variable rate loans, due October 2, 2017
Long-Term Debt
Mortgage loans, prior to debt issuance costs		$ 5,876																6,034
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)		3.86%
Nonrecourse variable rate loans, due February 1, 2019
Long-Term Debt
Mortgage loans, prior to debt issuance costs																		10,313
Mortgage loans, net				$ 10,120
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)				6.35%
Nonrecourse variable rate loans, due August 1, 2019
Long-Term Debt
Mortgage loans, prior to debt issuance costs							$ 7,418
Debt disclosures
Number of buildings used as collateral | building							4
Area of collateralized properties (in square feet) | ft²							240,000
Debt amount refinanced							$ 7,418
Nonrecourse variable rate mortgage, due September 1, 2025
Debt disclosures
Proceeds from issuance of debt									$ 2,600	$ 11,500
Term of debt										10 years
Amortization period of debt										25 years
Leased space | ft²										196,000
Number of subsidiaries which are party to the mortgage | subsidiary										1
Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member]
Long-Term Debt
Mortgage loans, prior to debt issuance costs						$ 26,725
Debt disclosures
Proceeds from issuance of debt						$ 13,000
Term of debt						10 years
Amortization period of debt						25 years
Debt amount refinanced						$ 13,725
2017 PUB Mortgage
Debt disclosures
New mortgage					$ 12,000
Area of collateralized properties (in square feet) | ft²					275,000
Term of debt					10 years
Amortization period of debt					25 years
Nonrecourse mortgages: 5.73%, due August 1, 2015
Long-Term Debt
Interest rate (as a percent)											5.73%
Debt disclosures
Number of buildings used as collateral | building											3
Area of collateralized properties (in square feet) | ft²											392,000
Debt amount refinanced											$ 17,891
Nonrecourse variable rate mortgage, due February 1, 2028 | Subsequent events
Long-Term Debt
Mortgage loans, prior to debt issuance costs	$ 11,781
Debt disclosures
Area of collateralized properties (in square feet) | ft²	137,000
Fixed interest rate pursuant to interest rate swap agreement (as a percent)	4.57%
Proceeds from issuance of debt	$ 7,000
Term of debt	10 years
Amortization period of debt	25 years
First Collateralized Property | Nonrecourse variable rate loans, due January 2, 2025
Debt disclosures
Area of collateralized properties (in square feet) | ft²												303,000
Leased space | ft²												201,000
First Collateralized Property | Nonrecourse variable rate mortgage, due May 1, 2026
Debt disclosures
Leased space | ft²							58,000
First Collateralized Property | 4.33%, due August 1, 2030 mortgage loan
Debt disclosures
Leased space | ft²														88,000					88,000
First Collateralized Property | Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member]
Debt disclosures
Area of collateralized properties (in square feet) | ft²						280,000
Second Collateralized Property | Nonrecourse variable rate loans, due January 2, 2025
Debt disclosures
Area of collateralized properties (in square feet) | ft²												228,000
Second Collateralized Property | Nonrecourse variable rate mortgage, due May 1, 2026
Debt disclosures
Leased space | ft²							40,000
Second Collateralized Property | 4.33%, due August 1, 2030 mortgage loan
Debt disclosures
Funds placed in (returned from) escrow													$ (600)
Second Collateralized Property | Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member]
Debt disclosures
Area of collateralized properties (in square feet) | ft²						252,000
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																	$ 949	1,081	$ (444)
Loss expected to be reclassified over next twelve months from accumulated other comprehensive loss to interest expense																	(786)
Net fair value of interest rate swap agreements																	201	1,685
Interest rate swap agreement | Other assets
Debt disclosures
Net fair value of interest rate swap agreements																	644	207
Interest rate swap agreement | Other liabilities
Debt disclosures
Net fair value of interest rate swap agreements																	845	$ 1,892
Interest rate swap agreement | Nonrecourse variable rate loans, due January 2, 2025
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)								4.39%
Number of interest rate swap derivatives | derivative								3
Interest rate swap agreement | Nonrecourse variable rate mortgage, due May 1, 2026
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)							4.17%
Interest rate swap agreement | Nonrecourse variable rate loans, due February 1, 2019
Debt disclosures
Payment for termination of interest rate swap agreement																	341
Recognized net losses (included in other comprehensive loss), before taxes, on interest rate swap agreements																	218
Deferred tax asset																	123
Interest expense																	98
Interest rate swap agreement | Nonrecourse variable rate loans, due February 1, 2019 | Forecast
Debt disclosures
Interest expense															$ 32	$ 211
Interest rate swap agreement | Nonrecourse variable rate loans, due August 1, 2019
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)							6.58%
Interest rate swap agreement | Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member]
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)						3.79%
Number of interest rate swap derivatives | derivative						2
Interest rate swap agreement | 2017 PUB Mortgage
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)					4.45%
Notional amount of interest rate swap agreement					$ 12
Nonrecourse Mortgage, Proceeds Excluding Contingent Portion [Member] | First Collateralized Property | Nonrecourse variable rate loans, due January 2, 2025
Debt disclosures
Leased space | ft²												102,000
Nonrecourse Mortgage, Proceeds Excluding Contingent Portion [Member] | Interest rate swap agreement | Nonrecourse variable rate loans, due January 2, 2025
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)												4.43%
Nonrecourse Mortgage, Proceeds Excluding Contingent Portion [Member] | Interest rate swap agreement | Nonrecourse variable rate mortgage, due September 1, 2025
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)										3.77%
Notional amount of interest rate swap agreement										$ 11,500
Nonrecourse Mortgage, Contingent Portion [Member] | 4.33%, due August 1, 2030 mortgage loan
Debt disclosures
Funds placed in (returned from) escrow														$ (25)
Nonrecourse Mortgage, Contingent Portion [Member] | Interest rate swap agreement | Nonrecourse variable rate loans, due January 2, 2025
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)								3.88%
Notional amount of interest rate swap agreement								$ 1,850
Nonrecourse Mortgage, Contingent Portion [Member] | Interest rate swap agreement | Nonrecourse variable rate mortgage, due September 1, 2025
Debt disclosures
Fixed interest rate pursuant to interest rate swap agreement (as a percent)									3.67%
Notional amount of interest rate swap agreement									$ 2,600
Mortgages [Member]
Annual principal payment requirements under the terms of the nonrecourse mortgage loans
2018																	3,590
2019																	3,751
2020																	6,976
2021																	3,945
2022																	7,970
Debt disclosures
Aggregate book value of land and buildings pledged as collateral																	$ 151,472
LIBOR
Debt disclosures
Variable interest rate margin (as a percent)																	2.75%
LIBOR | Nonrecourse variable rate loans, due January 2, 2025
Debt disclosures
Variable interest rate margin (as a percent)												1.95%
LIBOR | Nonrecourse variable rate mortgage, due May 1, 2026
Debt disclosures
Variable interest rate margin (as a percent)							2.00%
LIBOR | Nonrecourse variable rate loans, due October 2, 2017
Debt disclosures
Variable interest rate margin (as a percent)		2.75%
LIBOR | Nonrecourse variable rate loans, due February 1, 2019
Debt disclosures
Variable interest rate margin (as a percent)				2.75%
LIBOR | Nonrecourse variable rate loans, due August 1, 2019
Debt disclosures
Variable interest rate margin (as a percent)							3.08%
LIBOR | Nonrecourse variable rate mortgage, due September 1, 2025
Debt disclosures
Variable interest rate margin (as a percent)										1.65%
LIBOR | Nonrecourse Variable Rate Mortgage, Refinanced, Due In September 2026 [Member]
Debt disclosures
Variable interest rate margin (as a percent)						1.70%
LIBOR | 2017 PUB Mortgage
Debt disclosures
Variable interest rate margin (as a percent)					1.95%
LIBOR | Nonrecourse variable rate mortgage, due February 1, 2028 | Subsequent events
Debt disclosures
Variable interest rate margin (as a percent)	1.95%