Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Investment in Joint Venture - Summarized Activity Related to Investment in Joint Venture (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Equity Method Investments [Roll Forward]
Beginning Balance			$ 21,755
Our share of cumulative earnings	$ 927	$ (203)	656	$ 66
Ending Balance	22,104		22,104
Joint Venture
Equity Method Investments [Roll Forward]
Beginning Balance			21,755
Our share of cumulative earnings			656
Foreign currency translation gain			(307)
Ending Balance	$ 22,104		$ 22,104