Fair Value - Assets and Liabilities (Details) - USD ($) $ in Thousands	Nov. 30, 2016	Nov. 30, 2015
Financial assets:
Available-for-sale securities	$ 977	$ 1,970
Financial liabilities:
Interest rate swap agreements	1,685
Carrying Value | Level 1
Financial assets:
Cash and cash equivalents	24,689	18,271
Available-for-sale securities	977	1,970
Carrying Value | Level 2
Financial assets:
Interest rate swap	207
Financial liabilities:
Mortgage loans	109,697	89,185
Interest rate swap agreements	1,892	2,766
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	24,689	18,271
Available-for-sale securities	977	1,970
Estimated Fair Value | Level 2
Financial assets:
Interest rate swap	207
Financial liabilities:
Mortgage loans	111,103	90,155
Interest rate swap agreements	$ 1,892	$ 2,766