Debt - Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013
Debt Instrument [Line Items]
Long-term debt	$ 569,681	$ 286,381
Current portion of term loan	(20,000)
Unamortized financing fees	(10,567)
Long-term debt, Non current	539,114	286,381
Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt	340,000
7.375% Senior Notes, Due 2021 [Member]
Debt Instrument [Line Items]
Long-term debt	225,000	225,000
Revolving Credit Facility, Due 2017 [Member]
Debt Instrument [Line Items]
Long-term debt		61,200
Revolving Credit Facility, Due 2018 [Member]
Debt Instrument [Line Items]
Long-term debt	4,500
6.10% senior notes, due 2028 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 181	$ 181