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Leases - Other information related to leases (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating Lease, Payments	$ 4.6
Finance Lease, Interest Payment on Liability	0.2
Finance Lease, Principal Payments	0.1
Right-of-use assets obtained in exchange for lease liabilities	29.9
Finance Lease, Right-of-Use Asset	$ 15.3
Operating Lease, Weighted Average Remaining Lease Term	3 years 4 months 2 days
Finance Lease, Weighted Average Remaining Lease Term	14 years
Operating Lease, Weighted Average Discount Rate, Percent	5.00%
Finance Lease, Weighted Average Discount Rate, Percent	5.00%

X

- Definition

Amount of interest paid on finance lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
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- Definition

Amount of cash outflow for principal payment on finance lease.

+ References

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-SubTopic 20
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- Definition

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

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-Publisher FASB
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- Definition

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

+ References

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-Publisher FASB
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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.

+ References

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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