Fair Value Measurements (Details) (USD $)	Feb. 28, 2015	Nov. 29, 2014
Assets
Marketable securities	$ 2,095,000	$ 748,000
Derivative assets	5,320,000	1,007,000
Interest rate swaps	4,346,000	4,726,000
Cash-flow hedges	14,770,000	5,408,000
Liabilities [Abstract]
Derivative liabilities	2,178,000	433,000
Contingent Consideration Liability Continuing Operations Fair Value Disclosure	39,055,000	196,000
Contingent consideration liability, discontinued operations	5,000,000	5,000,000
Fair Value, Inputs, Level 1 [Member]
Assets
Marketable securities	2,095,000	748,000
Derivative assets	0	0
Interest rate swaps	0	0
Cash-flow hedges	0	0
Liabilities [Abstract]
Derivative liabilities	0	0
Contingent Consideration Liability Continuing Operations Fair Value Disclosure	0	0
Contingent consideration liability, discontinued operations	0	0
Fair Value, Inputs, Level 2 [Member]
Assets
Marketable securities	0	0
Derivative assets	5,320,000	1,007,000
Interest rate swaps	4,346,000	4,726,000
Cash-flow hedges	14,770,000	5,408,000
Liabilities [Abstract]
Derivative liabilities	2,178,000	433,000
Contingent Consideration Liability Continuing Operations Fair Value Disclosure	0	0
Contingent consideration liability, discontinued operations	0	0
Fair Value, Inputs, Level 3 [Member]
Assets
Marketable securities	0	0
Derivative assets	0	0
Interest rate swaps	0	0
Cash-flow hedges	0	0
Liabilities [Abstract]
Derivative liabilities	0	0
Contingent Consideration Liability Continuing Operations Fair Value Disclosure	39,055,000	196,000
Contingent consideration liability, discontinued operations	$ 5,000,000	$ 5,000,000