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SHAREHOLDERS' EQUITY AND REGULATORY CAPITAL - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		6 Months Ended
	Jul. 19, 2021	Jun. 30, 2021	Apr. 19, 2021	Dec. 31, 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)		154,680
Acquisition of treasury stock		$ 2.6
Acquisition of treasury stock (in usd per share)		$ 16.88
Stock repurchase program, additional number of shares authorized to be repurchased			562,000
Stock repurchase program, shares available for future repurchase		823,320
Stock repurchase program percentage of outstanding shares of common stock available for future purchase		7.00%
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Dividends declared per share (in usd per share)	$ 0.19
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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Aggregate dividends declared during the period for each share of common stock outstanding.

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

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Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury.

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