Subsequent Event	3 Months Ended
Mar. 29, 2014
Subsequent Event
Subsequent Event	On April 30, 2014, the Company acquired ATMI, Inc., a Delaware corporation (ATMI), for approximately $1.2 billion in cash pursuant to an Agreement and Plan of Merger (the Merger Agreement) with ATMI and Atomic Merger Corporation, a Delaware corporation and wholly-owned subsidiary of Entegris (Merger Sub). The Merger Agreement provides that, upon the terms and subject to the conditions thereof, Merger Sub would be merged with and into ATMI (the Merger). As a result of the Merger, ATMI became a wholly-owned subsidiary of the Company. The Merger will be accounted for under the acquisition method of accounting and the results of operations of ATMI will be included in the Company's condensed consolidated financial statements as of and since April 30, 2014. Costs of $1.3 million associated with the acquisition of ATMI were expensed as incurred in the three months ended March 29, 2014. ATMI is a leading supplier of high-performance materials, materials packaging and materials delivery systems used worldwide in the manufacture of microelectronics devices. Its products consist of “front-end” semiconductor performance materials, sub-atmospheric pressure gas delivery systems for safe handling and delivery of toxic and hazardous gases to semiconductor process equipment, and high-purity materials packaging and dispensing systems that allow for the reliable introduction of low volatility liquids and solids to microelectronics processes. ATMI’s sales for the year ended December 31, 2013 were approximately $361 million. The Company was not able to include certain required disclosures in its quarterly report on Form 10-Q for the three months ended March 29, 2014 because the information necessary to complete the preliminary purchase price allocation related to the acquisition was not yet available. The Merger was funded with existing cash balances as well as funds raised by the Company through the issuance of debt in the form of a senior secured term loan in an aggregate principal amount of $460 million and senior unsecured notes in an aggregate principal amount of $360 million. On April 1, 2014, the Company issued $360 million aggregate principal amount of 6% senior unsecured notes due April 1, 2022. The Company entered into the senior secured term loan facility on April 30, 2014 in an aggregate principal amount of $460 million. The senior secured term loan is due April 30, 2021 and initially bears interest at a rate per annum equal to the sum of 2.75% plus the applicable LIBOR rate then in effect. In addition to the senior term loan, on April 30, 2014 the Company also entered into a senior secured asset-based revolving credit facility that provides financing of $75 million, subject to a borrowing base. The senior secured asset-based revolving credit facility is due April 30, 2019 and bears interest at a rate per annum equal to the sum of 2% plus the applicable LIBOR rate then in effect.

On April 30, 2014, the Company acquired ATMI, Inc., a Delaware corporation (ATMI), for approximately $1.2 billion in cash pursuant to an Agreement and Plan of Merger (the Merger Agreement) with ATMI and Atomic Merger Corporation, a Delaware corporation and wholly-owned subsidiary of Entegris (Merger Sub). The Merger Agreement provides that, upon the terms and subject to the conditions thereof, Merger Sub would be merged with and into ATMI (the Merger). As a result of the Merger, ATMI became a wholly-owned subsidiary of the Company. The Merger will be accounted for under the acquisition method of accounting and the results of operations of ATMI will be included in the Company's condensed consolidated financial statements as of and since April 30, 2014. Costs of $1.3 million associated with the acquisition of ATMI were expensed as incurred in the three months ended March 29, 2014.

ATMI is a leading supplier of high-performance materials, materials packaging and materials delivery systems used worldwide in the manufacture of microelectronics devices. Its products consist of “front-end” semiconductor performance materials, sub-atmospheric pressure gas delivery systems for safe handling and delivery of toxic and hazardous gases to semiconductor process equipment, and high-purity materials packaging and dispensing systems that allow for the reliable introduction of low volatility liquids and solids to microelectronics processes. ATMI’s sales for the year ended December 31, 2013 were approximately $361 million.

The Company was not able to include certain required disclosures in its quarterly report on Form 10-Q for the three months ended March 29, 2014 because the information necessary to complete the preliminary purchase price allocation related to the acquisition was not yet available.

The Merger was funded with existing cash balances as well as funds raised by the Company through the issuance of debt in the form of a senior secured term loan in an aggregate principal amount of $460 million and senior unsecured notes in an aggregate principal amount of $360 million. On April 1, 2014, the Company issued $360 million aggregate principal amount of 6% senior unsecured notes due April 1, 2022. The Company entered into the senior secured term loan facility on April 30, 2014 in an aggregate principal amount of $460 million. The senior secured term loan is due April 30, 2021 and initially bears interest at a rate per annum equal to the sum of 2.75% plus the applicable LIBOR rate then in effect. In addition to the senior term loan, on April 30, 2014 the Company also entered into a senior secured asset-based revolving credit facility that provides financing of $75 million, subject to a borrowing base. The senior secured asset-based revolving credit facility is due April 30, 2019 and bears interest at a rate per annum equal to the sum of 2% plus the applicable LIBOR rate then in effect.