Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

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- Definition

Number of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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Total Equity and Other Comprehensive Income (Tarp Narrative) (Details) - $ / shares	Apr. 16, 2018	Apr. 04, 2018	Mar. 31, 2018	Dec. 31, 2017
TARP Warrant [Member]
Number of warrants or rights outstanding (shares)			2,800,000	3,500,000
Exercise price per share of warrants or rights outstanding			$ 67.20
Subsequent Event [Member] \| Dividend Declared [Member]
Dividends Payable Amount Per Share	$ 0.66	$ 0.75
Subsequent Event [Member] \| TARP Warrant [Member]
Exercise price per share of warrants or rights outstanding	$ 67.16
Number of shares into which each warrant or right may be converted (shares)	1