Available for Sale Marketable Debt Securities (Summary Amortized Cost and Estimated Fair Value) (Details) (Corporate Bonds [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 0	$ 3,522
Unrealized Gain	0	19
Unrealized (Loss)	0	0
Estimated Fair Value	$ 0	$ 3,541

Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax

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- Definition

Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax

+ References

No definition available.

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- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

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- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

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