Goodwill and Intangible Assets - Textuals (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2015	Jan. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 38,769	$ 38,769	$ 38,769
Amortization of Intangible Assets	$ 1,100	$ 3,300