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Leases - Other Lease Related Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Weighted average remaining lease term (years) - operating leases	11 years 4 months 24 days
Weighted average remaining lease term (years) - finance leases	3 years
Weighted average discount rate - operating leases (percent)	4.96%
Weighted average discount rate - finance leases (percent)	5.10%
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used by operating leases	$ 15,246
Operating cash flows used by finance leases	276
Financing cash flows used by finance leases	2,281
Leased assets obtained in exchange for new operating lease liabilities	661
Leased assets obtained in exchange for new finance lease liabilities	$ 0

X

- Definition

Amount of interest paid on finance lease liability.

+ References

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Amount of cash outflow for principal payment on finance lease.

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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.

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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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