Subsequent Events (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	1 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Rudolph Technologies, Inc [Member]	Jun. 30, 2013 Rudolph Technologies, Inc [Member]	Jun. 30, 2014 Rudolph Technologies, Inc [Member]	Jun. 30, 2013 Rudolph Technologies, Inc [Member]	Aug. 08, 2014 Rudolph Technologies, Inc [Member] Subsequent Event [Member]
Subsequent Event [Line Items]
Available-for-sale shares sold					18,240	24,431	67,419	31,931	25,700
Proceeds from Sale and Maturity of Available-for-sale Securities			$ 759	$ 405					$ 262
Gain on sale of available-for-sale securities	$ 203	$ 298	$ 750	$ 401	$ 203	$ 297	$ 750	$ 400	$ 258

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

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