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

X

- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_PreferredStockDividendsPerShareDeclared
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