Share Based Payments Stock-Based Compensation Expense and Related Tax Benefits Recognized (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 4,884	$ 2,942	$ 1,092
Tax benefit	1,954	0	0
Recognized stock-based compensation expense, net of tax	2,930	2,942	1,092
Station operating expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	2,236	852	146
Corporate expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 2,648	$ 2,090	$ 946