Comprehensive Income (Loss) Attributable to Noncontrolling Shareholders' Interests (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Net income attributable to noncontrolling shareholders' interests	$ 1,913	$ 3,977	$ 1,345
Other comprehensive income (loss):
Currency translation adjustments	795	(2,237)	3,375
Comprehensive income attributable to noncontrolling shareholders’ interests	$ 2,708	$ 1,740	$ 4,720

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration