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EMPLOYEE RETIREMENT PLANS AND POSTRETIREMENT BENEFITS - Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
EMPLOYEE RETIREMENT PLANS AND POSTRETIREMENT BENEFITS
Matching contributions	50.00%	50.00%	50.00%
Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%	6.00%	6.00%
Defined Contribution Plan, Cost	$ 3.1	$ 2.6	$ 1.6

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- References

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+ Details

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- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

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- Definition

Percentage employer matches of the employee's percentage contribution matched.

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