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SHAREHOLDERS' EQUITY - Treasury shares (Details) - BRL (R$) R$ / shares in Units, R$ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2017
SHAREHOLDERS' EQUITY
Quantity	12,042,044	12,042,044	13,842,004
Average cost per share	R$ 18.13	R$ 18.13	R$ 17.42
Historical value	R$ 218,265	R$ 218,265	R$ 241,088
Market value	R$ 458,560	R$ 477,827	R$ 258,797
Quantity, Sale	(1,800,000)
Average cost per share, Sale	R$ 12.68
Historical value, Sale	R$ (22,823)
Market value, Sale	R$ (66,636)

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- Definition

The increase in equity resulting from the sale or issue of treasury shares. [Refer: Treasury shares]

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An entity’s own equity instruments, held by the entity or other members of the consolidated group.

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Represents the market value of treasury shares.

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Represents the market value of treasury shares sold.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury sold during the period.

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The weighted average price per share of treasury shares sold.

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The weighted average price per share of treasury shares.

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