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Leases (Schedule of Supplemental Cash Flow Lease Information) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$ 32,405
Operating cash flows used for finance leases	222
Financing cash flows used for finance leases	2,151
Right-of-use assets obtained in exchange for new operating lease liabilities	43,431
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 5,753

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Cash paid for amounts included in the measurement of lease liabilities

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Amount of interest paid on finance lease liability.

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Amount of cash outflow for principal payment on finance lease.

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

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