COMPOSITION OF THE MAIN ITEMS OF THE CONSOLIDATED STATEMENT OF FINANCIAL POSITION AND CONSOLIDATED INCOME STATEMENT - Service fee expenses (Details) - ARS ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
COMPOSITION OF THE MAIN ITEMS OF THE CONSOLIDATED STATEMENT OF FINANCIAL POSITION AND CONSOLIDATED INCOME STATEMENT
Commissions paid	$ 2,171,167	$ 2,099,326	$ 1,813,673
Export and foreign currency operations	72,803	82,294	63,739
Total	$ 2,243,970	$ 2,181,620	$ 1,877,412

The amount of expense relating to fees and commissions.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 85
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_85&doctype=Standard
-URIDate 2019-03-27

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration