Acquisition-related Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Business Acquisition [Line Items]
Acquisition-related costs	$ 11,561	$ 301	$ 15,343	$ 477
Acquisition-related Costs Reserve [Roll Forward]
Balance at November 30, 2015			440
Add: Costs incurred			15,361
Revision to prior estimates			(18)
Less: Amount paid			(6,563)
Balance at May 31, 2016	9,220		9,220
Acquisition Related Employee Severance [Member]
Acquisition-related Costs Reserve [Roll Forward]
Balance at November 30, 2015			0
Add: Costs incurred			2,163
Revision to prior estimates			0
Less: Amount paid			(2,163)
Balance at May 31, 2016	0		0
Acquisition Related Contract Termination [Member]
Acquisition-related Costs Reserve [Roll Forward]
Balance at November 30, 2015			135
Add: Costs incurred			281
Revision to prior estimates			(18)
Less: Amount paid			(223)
Balance at May 31, 2016	175		175
Other Acquisition Related Costs [Member]
Acquisition-related Costs Reserve [Roll Forward]
Balance at November 30, 2015			305
Add: Costs incurred			12,917
Revision to prior estimates			0
Less: Amount paid			(4,177)
Balance at May 31, 2016	9,045		9,045
Shared Services [Member]
Acquisition-related Costs Reserve [Roll Forward]
Balance at May 31, 2016	6,600		6,600
Transportation Segment [Member]
Acquisition-related Costs Reserve [Roll Forward]
Balance at May 31, 2016	1,900		1,900
Resources Segment [Member]
Acquisition-related Costs Reserve [Roll Forward]
Balance at May 31, 2016	$ 700		$ 700