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Leases - Schedule of Supplemental Data (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 31,212
Operating cash flows for finance leases	1,996
Financing cash flows for finance leases	1,684
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	10,674
Finance leases	$ 1,774

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Right-of-use assets obtained in exchange for lease obligations.

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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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