Number of shares that have been repurchased during the period and are being held in treasury.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 10
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Name:	us-gaap_TreasuryStockSharesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

STOCKHOLDERS' EQUITY - Treasury Stock (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Jan. 28, 2021	Dec. 31, 2020
Treasury Stock
Aggregate cost of shares repurchased during the period	$ 1,001	$ 3,162
Stock Repurchase Program
Treasury Stock
Amount of stock repurchases authorized			$ 50,000
Number of shares repurchased during the period	14,923
Aggregate cost of shares repurchased during the period	$ 1,000
Amount available for repurchase	$ 49,000			$ 6,600