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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
EARNINGS PER SHARE
Antidilutive securities excluded from the computation of diluted earnings per share		0	0
Numerator:
Net income	$ 36,845	$ 66,865	$ 63,799
Earnings allocated to unvested restricted stock units	(93)
Numerator for earnings per share - basic	$ 36,752	$ 66,865	$ 63,799
Denominator:
Weighted average common shares outstanding	27,457,306	20,090,270	18,047,332
Weighted average common shares outstanding, including all dilutive potential shares	27,457,306	20,090,270	18,047,332
EARNINGS PER SHARE - BASIC	$ 1.34	$ 3.33	$ 3.54
EARNINGS PER SHARE - DILUTED	$ 1.34	$ 3.33	$ 3.54

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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