BUSINESS COMBINATIONS - Purchase Price (Details) $ / shares in Units, $ in Thousands	Apr. 07, 2017 USD ($) $ / shares shares	Mar. 11, 2016 USD ($) $ / shares shares
Floridian Financial Group [Member]
Business Acquisition [Line Items]
Shares exchanged for cash		$ 26,699,000
Number of GulfShore Bancshares, Inc. common shares outstanding \| shares		6,222,119
Per share exchange ratio		0.5289
Number of shares of common stock issued \| shares		3,291,066
Multiplied by common stock price per share \| $ / shares		$ 15.47
Value of common stock issued		$ 50,912,791
Total purchase price		$ 77,611,791
Bank shares, Inc [Member]
Business Acquisition [Line Items]
Shares exchanged for cash	$ 8,033,999
Number of GulfShore Bancshares, Inc. common shares outstanding \| shares	5,464,308
Per share exchange ratio	0.4807
Number of shares of common stock issued \| shares	2,626,693
Multiplied by common stock price per share \| $ / shares	$ 23.94
Value of common stock issued	$ 62,883,030
Total purchase price	$ 70,917,029

per share exchange ratio.

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Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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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

No definition available.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

+ References

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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Number of shares issued which are neither cancelled nor held in the treasury.

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