Fair Value Measurements - Additional Information (Details) (USD $)	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013	Jun. 10, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 254,150,000	$ 114,926,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	6,682,000	0	0
2014 Credit Agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities, Fair Value Disclosure, Nonrecurring	193,500,000
Long-term debt	193,000,000			185,000,000.0
Courseload Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	$ 6,700,000