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, 2014	Aug. 31, 2013	Aug. 31, 2014	Aug. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 583	$ 2,419	$ 1,531	$ 3,082
Tax benefit	(190)	0	(521)	0
Recognized stock-based compensation expense, net of tax	393	2,419	1,010	3,082
Station operating expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	68	1,213	470	1,466
Corporate expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense	$ 515	$ 1,206	$ 1,061	$ 1,616