Share Based Payments Stock-Based Compensation Expense and Related Tax Benefits Recognized (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	Aug. 31, 2013	Aug. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 2,419	$ 565	$ 3,082	$ 954
Tax benefit	0	0	0	0
Recognized stock-based compensation expense, net of tax	2,419	565	3,082	954
Station operating expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	1,213	296	1,466	447
Corporate expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 1,206	$ 269	$ 1,616	$ 507