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Summary of Significant Accounting Policies (Marketable Securities) (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2011 | Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items] |  |  |
Net realized gain (loss) on available-for-sale securities | $ 0 | $ (22,000) |
Adjusted Cost |  |  | 15,318,000
Gross Unrealized Gains |  |  | 12,361,000
Gross Unrealized Losses |  |  | 0
Fair Value |  |  | 27,679,000
Common Stocks [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Adjusted Cost | 4,195,000 |  | 4,195,000
Gross Unrealized Gains | 9,778,000 |  | 12,361,000
Gross Unrealized Losses | 0 |  | 0
Fair Value | 13,973,000 |  | 16,556,000
Government and government sponsored entities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Adjusted Cost |  |  | 11,123,000
Gross Unrealized Gains |  |  | 0
Gross Unrealized Losses |  |  | 0
Fair Value |  |  | $ 11,123,000

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- Definition Amount of investment in debt and equity 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 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition This item represents the cost of debt and equity 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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