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Stockholders' Equity (Narrative) (Details) - $ / shares | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Stockholders' Equity Note [Abstract] |  |
Cash dividends declared | $ 0 | $ 0

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
Period Type: | duration