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Subsequent Event	9 Months Ended
Subsequent Event	Oct. 31, 2018
Subsequent Events [Abstract]
Subsequent Event	SUBSEQUENT EVENTS On November 15, 2018, the Company's Board of Directors approved a quarterly dividend of $0.55 per share of Common Stock. This dividend will be paid on January 10, 2019 to shareholders of record on December 20, 2018. In the normal course of business, the Company entrusts precious scrap metals generated through its internal manufacturing operations to metal refiners. In November 2018, one such refiner filed for relief under chapter 11 of the U.S. Bankruptcy Code. As a result, the Company recognized a charge of $8.5 million during the three months ended October 31, 2018, which represents the carrying value of such precious scrap metals entrusted to the refiner, net of expected insurance recoveries.