ACQUISITIONS	6 Months Ended
Mar. 31, 2015
Business Combinations [Abstract]
Acquisitions	Acquisitions On November 18, 2013, the Company purchased the remaining 10% of the share capital of m2k-laser GmbH through its wholly-owned subsidiary RSL under an option agreement between the Company and the minority shareholders of m2k-laser GmbH. As a result, the Company currently holds 100% of the share capital of m2k-laser GmbH. Effective December 20, 2013, the Company acquired the remaining 12% of the common stock of ROFIN-BAASEL Japan Corp. through its wholly-owned subsidiary RSL. The Company currently holds 100% of the share capital of ROFIN-BAASEL Japan Corp. On April 10, 2014, the Company completed the acquisition of certain assets of FiLaser USA LLC ("FiLaser") and subsidiaries. The transaction contained all intellectual property including know-how, patents and patent applications of FiLaser. FiLaser developed advanced laser process technology used for precision cutting and drilling of brittle material including glass, sapphire and semiconductor substrates. The Company has held back approximately 28% of the purchase price as security for various claims. In addition, the purchase agreement also provides for potential future earn-out payments from revenues generated from certain of these intangible assets. Effective June 12, 2014, the Company acquired the remaining 5% of the common stock of DILAS Diodenlaser GmbH through its wholly-owned subsidiary ROFIN-SINAR Technologies Europe S.L. The Company currently holds 100% of the share capital of DILAS Diodenlaser GmbH. Effective December 23, 2014, the Company acquired an additional 8.8% of the common stock of Nanjing Eastern Laser Co., Ltd. The Company currently holds 88.8% of the share capital of Nanjing Eastern Laser Co., Ltd.

ACQUISITIONS

6 Months Ended

Mar. 31, 2015

On November 18, 2013, the Company purchased the remaining 10% of the share capital of m2k-laser GmbH through its wholly-owned subsidiary RSL under an option agreement between the Company and the minority shareholders of m2k-laser GmbH. As a result, the Company currently holds 100% of the share capital of m2k-laser GmbH.

Effective December 20, 2013, the Company acquired the remaining 12% of the common stock of ROFIN-BAASEL Japan Corp. through its wholly-owned subsidiary RSL. The Company currently holds 100% of the share capital of ROFIN-BAASEL Japan Corp.

On April 10, 2014, the Company completed the acquisition of certain assets of FiLaser USA LLC ("FiLaser") and subsidiaries. The transaction contained all intellectual property including know-how, patents and patent applications of FiLaser. FiLaser developed advanced laser process technology used for precision cutting and drilling of brittle material including glass, sapphire and semiconductor substrates. The Company has held back approximately 28% of the purchase price as security for various claims. In addition, the purchase agreement also provides for potential future earn-out payments from revenues generated from certain of these intangible assets.

Effective June 12, 2014, the Company acquired the remaining 5% of the common stock of DILAS Diodenlaser GmbH through its wholly-owned subsidiary ROFIN-SINAR Technologies Europe S.L. The Company currently holds 100% of the share capital of DILAS Diodenlaser GmbH.

Effective December 23, 2014, the Company acquired an additional 8.8% of the common stock of Nanjing Eastern Laser Co., Ltd. The Company currently holds 88.8% of the share capital of Nanjing Eastern Laser Co., Ltd.