Treasury Stock	3 Months Ended
Mar. 31, 2013
Treasury Stock [Abstract]
Treasury Stock	NOTE K – Treasury Stock Common stock held in treasury totaled 21,935,218 shares with a cost of $312.0 million at March 31, 2013 and 21,829,954 shares with a cost of $311.0 million at December 31, 2012. Approximately 8.1 million shares are available for future issuances. In August 2012, CTS’ Board of Directors authorized a program to repurchase up to one million shares of its common stock in the open market at a maximum price of $13 per share. The authorization has no expiration. Reacquired shares will be used to support equity-based compensation programs and for other corporate purposes. During the first three months of 2013, 105,264 shares were repurchased.

The entire disclosure for an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation.

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