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New Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncement Early Adoption [Line Items]
Lease liability	$ 1,214,028
Right-of-use assets	$ 998,319
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncement Early Adoption [Line Items]
Lease liability		$ 1,200,000
Right-of-use assets		$ 1,000,000