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LEASES. (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Weighted-average remaining lease term on operating leases	7 years		7 years
Weighted-average discount rate on operating leases	3.50%		3.50%
Operating lease expense	$ 7.1	$ 6.3	$ 22.9	$ 20.9
Variable charges related to operating leases not included in measurement of lease liability	$ 2.2		7.4
Cash paid included in measurement of operating lease liabilities			$ 22.7

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Amount of operating lease expense. Excludes sublease income.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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