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Comprehensive Income and Accumulated Other Comprehensive Income - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Comprehensive income	$ 23,861	$ 17,583	$ 72,123	$ 45,013
Comprehensive income tax rate			21.00%	21.00%

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- References

No definition available.

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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