Accounts Payable, Accrued Liabilities and Guarantees (Details 1) (USD $) In Thousands, unless otherwise specified	May 31, 2014	Nov. 30, 2013
Payables and Accruals [Abstract]
Accounts payable	$ 110,077	$ 79,164
Accrued salaries, wages and commissions	15,980	14,908
Pension and postretirement healthcare benefits liabilities	216	278
Compensated absences	9,375	8,600
Accrued insurance liabilities	11,381	7,599
Customer deposits	22,433	16,081
Other accrued liabilities	43,998	30,908
Accounts payable and accrued liabilities	213,460	157,538
Letters of credit outstanding, amount	$ 30,420	$ 28,541