Acquisition and Divestiture Activities	6 Months Ended
Jun. 28, 2014
Acquisition and Divestiture Activities [Abstract]
Acquisition and Divestiture Activities	Note 2 – Acquisition Activities As part of its growth strategy, the Company seeks to expand through targeted acquisitions of other manufacturers of electronic components that have established positions in major markets, reputations for product quality and reliability, and product lines with which the Company has substantial marketing and technical expertise. Holy Stone Polytech Co., Ltd. On June 11, 2014, Vishay acquired Holy Stone Polytech Co., Ltd. ("Holy Stone Polytech"), a Japanese manufacturer of tantalum capacitors and formerly a subsidiary of Holy Stone Enterprise Co. Ltd., for $20,776, net of cash acquired. The acquisition is expected to strengthen the Company's position in tantalum capacitors, especially in Asia. For financial reporting purposes, the results of operations of Holy Stone Polytech have been included in the Capacitors segment since June 11, 2014. The inclusion of this business did not have a material impact on the Company's consolidated results for the fiscal quarter or six fiscal months ended June 28, 2014. Based on an estimate of their fair values, the Company allocated $5,183 of the purchase price to definite-lived intangible assets. After allocating the purchase price to the assets acquired and liabilities assumed based on an estimation of their fair values at the date of acquisition, the Company recorded goodwill of $9,509 related to this acquisition. The goodwill associated with this transaction is not deductible for income tax purposes. The Company will test the goodwill for impairment at least annually in accordance with GAAP. The preliminary allocation is pending finalization of appraisals for property and equipment and intangible assets, finalization of a working capital adjustment, environmental assessments, and completion of other customary post-closing review activities. There can be no assurance that the estimated amounts recorded represent the final purchase allocation. Had this acquisition occurred as of the beginning of the periods presented in these consolidated condensed financial statements, the pro forma statements of operations would not be materially different than the consolidated condensed statements of operations presented. The remaining fluctuation in the goodwill account balance is due to foreign currency translation. Subsequent Event On July 11, 2014, Vishay entered into an agreement to acquire Taiwan based Capella Microsystems (Taiwan) Inc. ("Capella") for approximately $205,000. Capella is a fabless IC design company specializing in optoelectronic products. Vishay intends to acquire Capella first through a tender offer of up to 100 percent of Capella's outstanding shares at a price of NT$139 per share. The tender offer is conditioned upon at least a majority of the outstanding shares being tendered. If a majority, but less than 100%, of the outstanding shares are tendered, Vishay will complete the acquisition of Capella by merger according to the Agreement and Plan of Merger executed on July 11, 2014 with Capella. The period to tender outstanding shares began on July 14, 2014 and ends on September 1, 2014, but could be extended pursuant to local regulations. If a majority of the outstanding shares are tendered, the tender offer is expected to close in September 2014 followed by Vishay's acquisition of 100 percent of Capella in a merger by the end of January 2015. The closing of the tender offer and merger are subject to customary closing conditions, including obtaining all necessary governmental approvals and clearances.

Note 2 – Acquisition Activities

As part of its growth strategy, the Company seeks to expand through targeted acquisitions of other manufacturers of electronic components that have established positions in major markets, reputations for product quality and reliability, and product lines with which the Company has substantial marketing and technical expertise.

Holy Stone Polytech Co., Ltd.

On June 11, 2014, Vishay acquired Holy Stone Polytech Co., Ltd. ("Holy Stone Polytech"), a Japanese manufacturer of tantalum capacitors and formerly a subsidiary of Holy Stone Enterprise Co. Ltd., for $20,776, net of cash acquired. The acquisition is expected to strengthen the Company's position in tantalum capacitors, especially in Asia. For financial reporting purposes, the results of operations of Holy Stone Polytech have been included in the Capacitors segment since June 11, 2014. The inclusion of this business did not have a material impact on the Company's consolidated results for the fiscal quarter or six fiscal months ended June 28, 2014. Based on an estimate of their fair values, the Company allocated $5,183 of the purchase price to definite-lived intangible assets. After allocating the purchase price to the assets acquired and liabilities assumed based on an estimation of their fair values at the date of acquisition, the Company recorded goodwill of $9,509 related to this acquisition. The goodwill associated with this transaction is not deductible for income tax purposes. The Company will test the goodwill for impairment at least annually in accordance with GAAP. The preliminary allocation is pending finalization of appraisals for property and equipment and intangible assets, finalization of a working capital adjustment, environmental assessments, and completion of other customary post-closing review activities. There can be no assurance that the estimated amounts recorded represent the final purchase allocation.

Had this acquisition occurred as of the beginning of the periods presented in these consolidated condensed financial statements, the pro forma statements of operations would not be materially different than the consolidated condensed statements of operations presented.

The remaining fluctuation in the goodwill account balance is due to foreign currency translation.

Subsequent Event

On July 11, 2014, Vishay entered into an agreement to acquire Taiwan based Capella Microsystems (Taiwan) Inc. ("Capella") for approximately $205,000. Capella is a fabless IC design company specializing in optoelectronic products.

Vishay intends to acquire Capella first through a tender offer of up to 100 percent of Capella's outstanding shares at a price of NT$139 per share. The tender offer is conditioned upon at least a majority of the outstanding shares being tendered. If a majority, but less than 100%, of the outstanding shares are tendered, Vishay will complete the acquisition of Capella by merger according to the Agreement and Plan of Merger executed on July 11, 2014 with Capella. The period to tender outstanding shares began on July 14, 2014 and ends on September 1, 2014, but could be extended pursuant to local regulations. If a majority of the outstanding shares are tendered, the tender offer is expected to close in September 2014 followed by Vishay's acquisition of 100 percent of Capella in a merger by the end of January 2015. The closing of the tender offer and merger are subject to customary closing conditions, including obtaining all necessary governmental approvals and clearances.