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TREASURY STOCK (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 11, 2018	Dec. 31, 2016
Treasury Stock Transactions, Excluding Value of Shares Reissued [Abstract]
Treasury stock outstanding (in shares)	2,900,000	2,900,000
Treasury stock, cost	$ 119,900,000	$ 120,600,000
Treasury stock, weighted average cost per share (in dollars per share)	$ 41.87
Stock repurchase program, authorized amount (up to)			$ 225,000,000	$ 150,000,000.0
Stock repurchased during period (in shares)	0	0

X

- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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- Definition

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.

+ References

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

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- Definition

Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury.

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