Subsequent Events	12 Months Ended
Dec. 31, 2013
Subsequent Events	T. SUBSEQUENT EVENTS In January 2014, the Board declared an initial quarterly cash dividend of $0.06 per share to be paid on June 2, 2014 to shareholders of record as of May 9, 2014. Payments of future cash dividends will rest within the discretion of the Board and will depend, among other things, upon Teradyne’s earnings, capital requirements and financial condition. Michael A. Bradley retired as Chief Executive Officer of Teradyne effective January 31, 2014. Mr. Bradley will continue to serve on Teradyne’s Board of Directors. In connection with his retirement, Teradyne entered into an agreement on January 22, 2014 with Mr. Bradley (the “Retirement Agreement”). Under the Retirement Agreement, Mr. Bradley’s unvested restricted stock units and stock options granted prior to his Retirement Date will continue to vest in accordance with their terms through January 31, 2017; and any vested options or options that vest during that period may be exercised for the remainder of the applicable option term. In the Retirement Agreement, Mr. Bradley agreed to be bound by non-competition and non-solicitation restrictions through January 31, 2017. The Retirement Agreement also includes additional, standard terms and conditions relating to Mr. Bradley’s separation from Teradyne. Teradyne will record a stock based compensation expense of approximately $6.6 million in the first quarter of 2014 related to the Retirement Agreement.

Subsequent Events

12 Months Ended

Dec. 31, 2013

T. SUBSEQUENT EVENTS

In January 2014, the Board declared an initial quarterly cash dividend of $0.06 per share to be paid on June 2, 2014 to shareholders of record as of May 9, 2014. Payments of future cash dividends will rest within the discretion of the Board and will depend, among other things, upon Teradyne’s earnings, capital requirements and financial condition.

Michael A. Bradley retired as Chief Executive Officer of Teradyne effective January 31, 2014. Mr. Bradley will continue to serve on Teradyne’s Board of Directors. In connection with his retirement, Teradyne entered into an agreement on January 22, 2014 with Mr. Bradley (the “Retirement Agreement”). Under the Retirement Agreement, Mr. Bradley’s unvested restricted stock units and stock options granted prior to his Retirement Date will continue to vest in accordance with their terms through January 31, 2017; and any vested options or options that vest during that period may be exercised for the remainder of the applicable option term. In the Retirement Agreement, Mr. Bradley agreed to be bound by non-competition and non-solicitation restrictions through January 31, 2017. The Retirement Agreement also includes additional, standard terms and conditions relating to Mr. Bradley’s separation from Teradyne. Teradyne will record a stock based compensation expense of approximately $6.6 million in the first quarter of 2014 related to the Retirement Agreement.