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Leases (Operating Lease) (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lease cost for operating leases
Operating lease cost	$ 9,657	$ 19,190
Operating cash flow information: Cash paid for amounts included in the measurement of lease liabilities		18,873
Non-cash activity: Right-of-use assets obtained in exchange for lease liabilities		$ 4,554
Weighted average remaining lease term	9 years	9 years
Weighted average discount rate	3.98%	3.98%

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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

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