Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013	Dec. 01, 2012
Financial assets:
Interest rate swap	$ 63
Financial liabilities:
Interest rate swaps	2,285	3,191
Carrying Value | Level 1
Financial assets:
Cash and cash equivalents	14,179	10,181
Available-for-sale securities	2,208	4,226
Carrying Value | Level 2
Financial assets:
Interest rate swap	63
Financial liabilities:
Mortgage debt	66,708	59,489
Interest rate swaps	2,285	3,191
Estimated Fair Value
Financial liabilities:
Fair value of fixed rate mortgages	29,300	35,600
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	14,179	10,181
Available-for-sale securities	2,208	4,226
Estimated Fair Value | Level 2
Financial assets:
Interest rate swap	63
Financial liabilities:
Mortgage debt	67,931	61,781
Interest rate swaps	$ 2,285	$ 3,191