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Consolidated Statements Of Stockholders' Equity (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | 9 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012
Statement Of Stockholders Equity [Abstract] |  |
Stock-based incentive plan, shares | 100 | 1,050
Accrued dividends |  | $ 801
Issuance of shares in common stock offering |  | 15,000,000
Offering issuance costs |  | $ 2,214

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