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Consolidated Statements of Shareholders' Equity Parenthetical (USD $)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Statement of Stockholders' Equity [Abstract] | |||
| Cash dividends per share | $ 0.30 | $ 0.05 | $ 0.00 |