Income Taxes - Deferred Tax Balance Classification in Balance Sheet (Detail) - USD ($) $ in Thousands	Dec. 31, 2019		Dec. 31, 2018
Income Tax Disclosure [Abstract]
Long term deferred tax assets	$ 2,655		$ 3,152
Long term deferred tax liabilities	(519,980)	[1]	(491,946)
Net deferred tax liabilities	$ (517,325)		$ (488,794)

[1] Reflects the impact of the Company's adoption of ASU 2016-02 "Leases", on January 1, 2019, using a modified retrospective transition method. Under this method, financial results reported in periods prior to 2019 are unchanged. Refer to footnote 14.