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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash dividends on preferred stock, rate	1.00%	1.00%	1.06%
Cash dividends on common stock, per share	$ 0.41	$ 0.39	$ 0.34
Retained Earnings [Member]
Cash dividends on preferred stock, rate	1.00%	1.00%	1.06%
Cash dividends on common stock, per share	$ 0.41	$ 0.39	$ 0.34

X

- Definition

Aggregate dividends paid 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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X

- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

+ Details

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X

- Details

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