SUBSEQUENT EVENT (Details) - Subsequent Event. $ / shares in Units, $ in Millions	Jan. 28, 2020 USD ($) $ / shares shares
Secondary Public Offering
Subsequent event
Issuance of common stock (in shares)	3,152,712
Issue price (in dollars per share) \| $ / shares	$ 45.50
Gross proceeds \| $	$ 143.4
Underwriters' Option
Subsequent event
Issuance of common stock (in shares)	411,223

Number of new stock issued during the period.

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration