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Subsequent Event	12 Months Ended
Subsequent Event	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events [Text Block]	SUBSEQUENT EVENTS On January 10, 2020, The Company acquired Sinmat, a CMP slurry manufacturer for approximately $75 million, subject to customary purchase price adjustments. The Company funded the acquisition from its available cash. Sinmat will be a part of the SCEM segment. The acquisition does not constitute a material business combination. On February 5, 2020, the Company’s Board of Directors authorized a repurchase program, effective February 16, 2020, covering up to an aggregate of $125 million of the Company’s common stock, during a period of twelve months, in open market transactions and in accordance with one or more pre-arranged stock trading plans to be established in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. This repurchase program is intended to replace the existing repurchase program, which was originally approved in February 2018 and amended in November 2018, which is set to expire pursuant to its terms on February 15, 2020.