Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	May 31, 2014	Nov. 30, 2013
Assets
Marketable securities	$ 1,271	$ 28,786
Derivative assets	956	533
Interest rate swaps	5,293	5,930
Liabilities [Abstract]
Derivative liabilities	954	1,399
Fair value of cash-flow hedges	3,594	4,801
Contingent consideration liability, continuing operations	354	566
Contingent consideration liability, discontinued operations	5,000	5,000
Fair Value, Inputs, Level 1 [Member]
Assets
Marketable securities	1,271	28,786
Derivative assets	0	0
Interest rate swaps	0	0
Liabilities [Abstract]
Derivative liabilities	0	0
Fair value of cash-flow hedges	0	0
Contingent consideration liability, continuing operations	0	0
Contingent consideration liability, discontinued operations	0	0
Fair Value, Inputs, Level 2 [Member]
Assets
Marketable securities	0	0
Derivative assets	956	533
Interest rate swaps	5,293	5,930
Liabilities [Abstract]
Derivative liabilities	954	1,399
Fair value of cash-flow hedges	3,594	4,801
Contingent consideration liability, continuing operations	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
Liabilities [Abstract]
Derivative liabilities	0	0
Fair value of cash-flow hedges	0	0
Contingent consideration liability, continuing operations	354	566
Contingent consideration liability, discontinued operations	$ 5,000	$ 5,000