SHAREHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Common shares, authorized	65,000,000	65,000,000
Common shares, par value (in dollars per share)	$ 0.10	$ 0.10
Stock repurchased and retired during period, value	$ 6.6	$ 31.4	$ 0.0
Stock repurchased and retired during period, shares	150,778	749,614	0
Stock Options
Share-based Compensation
Shares retired that were received by employees as payment for the exercise price of their stock options and taxes owed upon exercise of their stock options and release of their restricted awards (in shares)	82,601	62,908	87,679
Stock Awards
Share-based Compensation
Shares forfeited during period	5,345	8,775	14,033

Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

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Number of shares that have been repurchased and retired during the period.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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