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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 25, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased (in shares)						416,000
Acquisition of treasury stock (in shares)		82,725		82,725
Acquisition of treasury stock		$ 1,438		$ 1,438
Acquisition of treasury stock (in usd per share)				$ 17.38
Dividends declared per share (in usd per share)		$ 0.1	$ 0.09	$ 0.3	$ 0.26
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Dividends declared per share (in usd per share)	$ 0.12
Maximum
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program authorized, maximum percentage of outstanding shares of common stock						5.00%

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Stock Repurchase Program Authorized, Percentage Of Outstanding Shares Of Common Stock

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Aggregate dividends declared 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)
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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
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-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

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