Restructuring Charges (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014 positions	May 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 860	$ 3,231	$ 4,035	$ 8,019
Restructuring charges, number of positions eliminated			89
Restructuring Reserve [Roll Forward]
Balance at November 30, 2013			2,695
Add: Restructuring costs incurred			5,062
Revision to prior estimates			(1,027)
Less: Amount paid			(4,985)
Balance at May 31, 2014	1,745		1,745
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Balance at November 30, 2013			2,569
Add: Restructuring costs incurred			4,179
Revision to prior estimates			(1,476)
Less: Amount paid			(3,846)
Balance at May 31, 2014	1,426		1,426
Contract Termination [Member]
Restructuring Reserve [Roll Forward]
Balance at November 30, 2013			103
Add: Restructuring costs incurred			396
Revision to prior estimates			449
Less: Amount paid			(629)
Balance at May 31, 2014	319		319
Other Restructuring Charges [Member]
Restructuring Reserve [Roll Forward]
Balance at November 30, 2013			23
Add: Restructuring costs incurred			487
Revision to prior estimates			0
Less: Amount paid			(510)
Balance at May 31, 2014	0		0
Americas Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1,800
Restructuring Reserve [Roll Forward]
Balance at May 31, 2014	500		500
EMEA Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1,900
Restructuring Reserve [Roll Forward]
Balance at May 31, 2014	1,200		1,200
APAC Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 300