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Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income	$ 8,689	$ 26,783
Denominator:
Weighted-average shares outstanding for basic earnings per share	9,325,000	9,533,000
Effect of dilutive securities	297,000	489,000
Weighted-average shares adjusted for dilutive securities	9,622,000	10,022,000
Earnings per share:
Basic	$ 0.93	$ 2.81
Diluted	$ 0.90	$ 2.67

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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-URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1505-109256

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- References

No definition available.

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256

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