The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

General - Additional Information (Detail) $ in Thousands	Aug. 22, 2019	Aug. 08, 2019	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Schedule of Accounting Policies [Line Items]
Cumulative-effect adjustment to retained earnings			$ 68,613	$ 48,973
Stock split ratio	2	2
Percentage of stock dividend from stock split		100.00%
Accounting Standards Update 2016-13 [Member] \| Cumulative Effect Period of Adoption Adjustment [Member]
Schedule of Accounting Policies [Line Items]
Cumulative-effect adjustment to retained earnings			$ 1,100