Restructuring Charges (Details) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2016 USD ($)	May 31, 2015 USD ($)	May 31, 2016 USD ($) positions	May 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring reserve payable in next 12 months	$ 6,600		$ 6,600
Restructuring charges	7,639	$ 6,720	$ 13,342	$ 20,141
Restructuring charges, number of positions eliminated | positions			245
Restructuring Reserve [Roll Forward]
Balance at November 30, 2015			$ 14,846
Add: Restructuring costs incurred			13,836
Revision to prior estimates			(494)
Less: Amount paid			(18,985)
Balance at May 31, 2016	9,203		9,203
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Balance at November 30, 2015			8,520
Add: Restructuring costs incurred			13,189
Revision to prior estimates			8
Less: Amount paid			(17,640)
Balance at May 31, 2016	4,077		4,077
Contract Termination [Member]
Restructuring Reserve [Roll Forward]
Balance at November 30, 2015			6,218
Add: Restructuring costs incurred			647
Revision to prior estimates			(502)
Less: Amount paid			(1,345)
Balance at May 31, 2016	5,018		5,018
Other Restructuring Charges [Member]
Restructuring Reserve [Roll Forward]
Balance at November 30, 2015			108
Add: Restructuring costs incurred			0
Revision to prior estimates			0
Less: Amount paid			0
Balance at May 31, 2016	108		108
Resources Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			7,500
Restructuring Reserve [Roll Forward]
Balance at May 31, 2016	4,800		4,800
Transportation Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			2,000
Restructuring Reserve [Roll Forward]
Balance at May 31, 2016	2,600		2,600
CMS Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			3,800
Restructuring Reserve [Roll Forward]
Balance at May 31, 2016	$ 1,600		$ 1,600