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CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical) | 6 Months Ended
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Jun. 30, 2018 $ / shares
Statement of Stockholders' Equity [Abstract] |
Series A preferred stock dividend (in dollars per share) | $ 1.00

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- Definition Aggregate dividends declared during the period for each share of preferred stock outstanding. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_StatementOfStockholdersEquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration