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Consolidated Statements Of Stockholders' Equity (Unaudited) (Parenthetical) | 3 Months Ended
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Mar. 31, 2013 | Mar. 31, 2012
Statement Of Stockholders Equity [Abstract] |  |
Stock-based incentive plan, shares | 100 | 600

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- Definition Stock-based incentive plan, shares. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration