STOCKHOLDERS' EQUITY AND REGULATORY CAPITAL MATTERS - EQUITY (Details) $ in Millions	12 Months Ended
Dec. 31, 2016 USD ($) item
Dividend Restrictions
Number of previous years retained profit considered for dividend payment	2 years
Amount of dividend that can be declared without prior approval \| $	$ 60
Class A Common Stock
Common Stock
Dividends common stock cash as percentage of cash dividend paid on Class B common stock	110.00%
Number of votes per share	1
Class B Common Stock
Common Stock
Number of votes per share	10

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+ References

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- Definition

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+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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Amount of dividends that can be declared or paid without approval of regulatory agency.

+ 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.(e))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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