Restructuring and Other	12 Months Ended
Dec. 31, 2017
Restructuring and Other	M. RESTRUCTURING AND OTHER During the year ended December 31, 2017, Teradyne recorded an expense of $7.8 million for the increase in the fair value of the Universal Robots contingent consideration liability, $3.8 million of severance charges related to headcount reduction of 91 people, of which 75 people were in Semiconductor Test, and 8 people each in Industrial Automation and in Corporate, $1.1 million for an impairment of fixed assets in Semiconductor Test, $1.0 million for a lease impairment of a Wireless Test facility in Sunnyvale, CA, which was terminated in September 2017, and $0.8 million of expenses related to an earthquake in Kumamoto, Japan, partially offset by $5.1 million of property insurance recovery related to the Japan earthquake. During the year ended December 31, 2016, Teradyne recorded an expense of $15.9 million for the increase in the fair value of the contingent consideration liability, of which $15.3 million was related to Universal Robots and $0.6 million was related to AIT, $6.0 million of severance charges related to headcount reductions of 146 people, of which 102 people were in Wireless Test and 44 people were in Semiconductor Test, $4.2 million for an impairment of fixed assets, and $0.9 million for expenses related to an earthquake in Kumamoto, Japan, partially offset by $5.1 million of property insurance recovery related to the Japan earthquake. During the year ended December 31, 2015, Teradyne recorded an expense of $5.3 million for the increase in the fair value of the Universal Robots contingent consideration liability, $1.5 million of severance charges related to headcount reductions of 23 people primarily in System Test and Semiconductor Test, and $1.0 million for acquisition costs related to Universal Robots, partially offset by a $2.9 million gain from fair value adjustments to decrease the acquisition contingent consideration liability, of which $1.6 million was related to ZTEC and $1.3 million was related to AIT. The remaining accrual for severance of $1.4 million is reflected in the accrued employees’ compensation and withholdings on the balance sheet and is expected to be paid by December 2018.

M. RESTRUCTURING AND OTHER

During the year ended December 31, 2017, Teradyne recorded an expense of $7.8 million for the increase in the fair value of the Universal Robots contingent consideration liability, $3.8 million of severance charges related to headcount reduction of 91 people, of which 75 people were in Semiconductor Test, and 8 people each in Industrial Automation and in Corporate, $1.1 million for an impairment of fixed assets in Semiconductor Test, $1.0 million for a lease impairment of a Wireless Test facility in Sunnyvale, CA, which was terminated in September 2017, and $0.8 million of expenses related to an earthquake in Kumamoto, Japan, partially offset by $5.1 million of property insurance recovery related to the Japan earthquake.

During the year ended December 31, 2016, Teradyne recorded an expense of $15.9 million for the increase in the fair value of the contingent consideration liability, of which $15.3 million was related to Universal Robots and $0.6 million was related to AIT, $6.0 million of severance charges related to headcount reductions of 146 people, of which 102 people were in Wireless Test and 44 people were in Semiconductor Test, $4.2 million for an impairment of fixed assets, and $0.9 million for expenses related to an earthquake in Kumamoto, Japan, partially offset by $5.1 million of property insurance recovery related to the Japan earthquake.

During the year ended December 31, 2015, Teradyne recorded an expense of $5.3 million for the increase in the fair value of the Universal Robots contingent consideration liability, $1.5 million of severance charges related to headcount reductions of 23 people primarily in System Test and Semiconductor Test, and $1.0 million for acquisition costs related to Universal Robots, partially offset by a $2.9 million gain from fair value adjustments to decrease the acquisition contingent consideration liability, of which $1.6 million was related to ZTEC and $1.3 million was related to AIT.

The remaining accrual for severance of $1.4 million is reflected in the accrued employees’ compensation and withholdings on the balance sheet and is expected to be paid by December 2018.