|
Investments (Cost And Estimated Fair Value Of Investments) (Details) (USD $)
In Thousands, unless otherwise specified
|
6 Months Ended |
12 Months Ended |
|
|
|
Jun. 30, 2014
|
Dec. 31, 2013
|
Jun. 30, 2013
|
Dec. 31, 2012
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
|
| Cost |
$ 6,410 |
$ 5,312 |
|
|
| Gross unrealized gain |
1,599 |
2,687 |
|
|
| Gross unrealized loss |
(54) |
(54) |
|
|
| Fair value, investments |
7,955 |
7,945 |
|
|
| Less cash equivalents, Carrying amount |
837 |
1,505 |
771 |
1,102 |
|
Money Market [Member]
|
|
|
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
|
| Cost |
300 |
540 |
|
|
| Gross unrealized gain |
0 |
0 |
|
|
| Gross unrealized loss |
0 |
0 |
|
|
| Fair value, investments |
300 |
540 |
|
|
|
Commercial Paper [Member]
|
|
|
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
|
| Cost |
345 |
601 |
|
|
| Gross unrealized gain |
0 |
0 |
|
|
| Gross unrealized loss |
0 |
0 |
|
|
| Fair value, investments |
345 |
601 |
|
|
|
Treasury Bills [Member]
|
|
|
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
|
| Cost |
6,333 |
5,226 |
|
|
| Gross unrealized gain |
1 |
1 |
|
|
| Gross unrealized loss |
0 |
0 |
|
|
| Fair value, investments |
6,334 |
5,227 |
|
|
|
Equity Securities [Member]
|
|
|
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
|
| Cost |
77 |
86 |
|
|
| Gross unrealized gain |
1,598 |
2,686 |
|
|
| Gross unrealized loss |
(54) |
(54) |
|
|
| Fair value, investments |
1,621 |
2,718 |
|
|
|
Debt and Equity Securities [Member]
|
|
|
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
|
| Cost |
7,055 |
6,453 |
|
|
| Gross unrealized gain |
1,599 |
2,687 |
|
|
| Gross unrealized loss |
(54) |
(54) |
|
|
| Fair value, investments |
8,600 |
9,086 |
|
|
|
Less Cash Equivalents [Member]
|
|
|
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
|
|
|
| Gross unrealized gain |
0 |
0 |
|
|
| Gross unrealized loss |
0 |
0 |
|
|
| Less cash equivalents, Carrying amount |
645 |
1,141 |
|
|
| Less cash equivalents, Fair value |
$ 645 |
$ 1,141 |
|
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