Comprehensive Income (Loss) Attributable to Noncontrolling Shareholders' Interests (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Equity [Abstract]
Net income attributable to noncontrolling shareholders' interests	$ 437	$ 701	$ 637	$ 1,400
Other comprehensive income (loss):
Currency translation adjustments	(340)	(5,083)	640	(1,139)
Comprehensive income (loss) attributable to noncontrolling shareholders’ interests	$ 97	$ (4,382)	$ 1,277	$ 261

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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