Stock Repurchase Program and Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	May 17, 2017	Feb. 07, 2017	Apr. 29, 2017	Apr. 30, 2016	Apr. 10, 2017
Stockholders' Equity
Stock Repurchase Program, Authorized Amount					$ 25.0
Cash dividends declared per share		$ 0.06	$ 0.06	$ 0.06
Subsequent Event
Stockholders' Equity
Cash dividends declared per share	$ 0.08