SHAREHOLDERS' EQUITY (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Oct. 24, 2018
Common shares repurchased
Share repurchase authorization				$ 500,000
Common shares repurchased	499	2,632	3,584
Payments for common shares repurchased	$ 14,000	$ 118,547	$ 200,000
Remaining available for repurchase	$ 287,452

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration