Segments - Information of total assets for company's reportable segments (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014	Apr. 30, 2013
Segment Reporting Information [Line Items]
Total assets	$ 803,135	$ 830,897	$ 664,225
Licensed
Segment Reporting Information [Line Items]
Total assets	342,418		320,911
Non-Licensed
Segment Reporting Information [Line Items]
Total assets	233,294		216,306
Retail
Segment Reporting Information [Line Items]
Total assets	144,300		61,123
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 83,123		$ 65,885