Acquisitions	12 Months Ended
Dec. 31, 2014
Business Combinations [Abstract]
Acquisitions	Acquisitions During 2013, we completed two acquisitions (collectively the "2013 Acquisitions") qualifying as business combinations in exchange for aggregate net cash consideration of $145.3 million, net of cash acquired. Substantially all of the consideration was allocated to Goodwill and Acquisition-related intangible assets, net. For information on the goodwill arising from the 2013 Acquisitions, see Note 4: Goodwill and for information on the classification of intangible assets, see Note 5: Acquisition-Related Intangible Assets, Net. These 2013 Acquisitions were not significant to our consolidated results of operations. In connection with one of the 2013 Acquisitions, we assumed debt of $22.0 million, which was paid in full immediately following the closing of the acquisition. We have no outstanding debt as of December 31, 2014 and 2013 relating to the 2013 Acquisitions. Furthermore, in connection with one of the 2013 Acquisitions, an amount equal to 10% of the total purchase price was held back for payment to the former parent company on the first anniversary of the closing of the acquisition, net of any indemnification obligations. During 2014, we paid this holdback in the amount of $3.4 million. In December 2010, we completed one acquisition (the "2010 Acquisition") qualifying as a business combination in exchange for cash consideration of $8.0 million, net of cash acquired. Substantially all of the consideration was allocated to Goodwill and Acquisition-related intangible assets, net. In connection with the 2010 Acquisition, we were required to pay future installments of $7.5 million to the company's former shareholder over a four-year period ending December 2014, contingent upon the continued employment of this individual by Altera. Approximately $1.9 million was recognized as compensation expense in our consolidated statements of comprehensive income for each of the years ended December 31, 2014, 2013 and 2012.

Acquisitions

12 Months Ended

Dec. 31, 2014

During 2013, we completed two acquisitions (collectively the "2013 Acquisitions") qualifying as business combinations in exchange for aggregate net cash consideration of $145.3 million, net of cash acquired. Substantially all of the consideration was allocated to Goodwill and Acquisition-related intangible assets, net. For information on the goodwill arising from the 2013 Acquisitions, see Note 4: Goodwill and for information on the classification of intangible assets, see Note 5: Acquisition-Related Intangible Assets, Net. These 2013 Acquisitions were not significant to our consolidated results of operations. In connection with one of the 2013 Acquisitions, we assumed debt of $22.0 million, which was paid in full immediately following the closing of the acquisition. We have no outstanding debt as of December 31, 2014 and 2013 relating to the 2013 Acquisitions. Furthermore, in connection with one of the 2013 Acquisitions, an amount equal to 10% of the total purchase price was held back for payment to the former parent company on the first anniversary of the closing of the acquisition, net of any indemnification obligations. During 2014, we paid this holdback in the amount of $3.4 million.

In December 2010, we completed one acquisition (the "2010 Acquisition") qualifying as a business combination in exchange for cash consideration of $8.0 million, net of cash acquired. Substantially all of the consideration was allocated to Goodwill and Acquisition-related intangible assets, net. In connection with the 2010 Acquisition, we were required to pay future installments of $7.5 million to the company's former shareholder over a four-year period ending December 2014, contingent upon the continued employment of this individual by Altera. Approximately $1.9 million was recognized as compensation expense in our consolidated statements of comprehensive income for each of the years ended December 31, 2014, 2013 and 2012.