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Marketable securities (Tables)
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12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2012
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| Marketable securities | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of investments in available-for-sale securities |
Investments in available-for-sale securities at December 31, 2012 were:
Investments in available-for-sale securities at December 31, 2011 were:
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| Schedule of cost and market value of the company's investments determined by contractual maturity |
The cost and market value of our investments at December 31, 2012 by contractual maturity were:
The cost and market value of our investments at December 31, 2011 by contractual maturity were:
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