|
Investments (Cost And Estimated Fair Value Of Investments) (Details) (USD $)
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12 Months Ended |
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|
Dec. 31, 2013
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Dec. 31, 2012
|
Dec. 31, 2011
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| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
| Cost |
$ 5,312,000 |
$ 5,341,000 |
|
| Gross unrealized gain |
2,687,000 |
3,639,000 |
|
| Gross unrealized loss |
54,000 |
55,000 |
|
| Fair value, investments |
7,945,000 |
8,925,000 |
|
| Less cash equivalents, Carrying amount |
1,505,000 |
1,102,000 |
5,476,000 |
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Money Market [Member]
|
|
|
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| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
| Cost |
540,000 |
804,000 |
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| Gross unrealized gain |
0 |
0 |
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| Gross unrealized loss |
0 |
0 |
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| Fair value, investments |
540,000 |
804,000 |
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|
Commercial Paper [Member]
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|
|
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| Schedule of Available-for-sale Securities [Line Items] |
|
|
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| Cost |
601,000 |
200,000 |
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| Gross unrealized gain |
0 |
0 |
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| Gross unrealized loss |
0 |
0 |
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| Fair value, investments |
601,000 |
200,000 |
|
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Treasury Bills [Member]
|
|
|
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| Schedule of Available-for-sale Securities [Line Items] |
|
|
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| Cost |
5,226,000 |
5,249,000 |
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| Gross unrealized gain |
1,000 |
0 |
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| Gross unrealized loss |
0 |
1,000 |
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| Fair value, investments |
5,227,000 |
5,248,000 |
|
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Equity Securities [Member]
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|
|
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| Schedule of Available-for-sale Securities [Line Items] |
|
|
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| Cost |
86,000 |
92,000 |
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| Gross unrealized gain |
2,686,000 |
3,639,000 |
|
| Gross unrealized loss |
54,000 |
54,000 |
|
| Fair value, investments |
2,718,000 |
3,677,000 |
|
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Debt and Equity Securities [Member]
|
|
|
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| Schedule of Available-for-sale Securities [Line Items] |
|
|
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| Cost |
6,453,000 |
6,345,000 |
|
| Gross unrealized gain |
2,687,000 |
3,639,000 |
|
| Gross unrealized loss |
54,000 |
55,000 |
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| Fair value, investments |
9,086,000 |
9,929,000 |
|
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Less Cash Equivalents [Member]
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|
|
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| Schedule of Available-for-sale Securities [Line Items] |
|
|
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| Gross unrealized gain |
0 |
0 |
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| Gross unrealized loss |
0 |
0 |
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| Less cash equivalents, Carrying amount |
1,141,000 |
1,004,000 |
|
| Less cash equivalents, Fair value |
$ 1,141,000 |
$ 1,004,000 |
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