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Disposition of Business (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Payment for working capital to buyers       $ 0 $ 1,194
Loss on disposal of business   $ 0 $ 0 $ 0 (1,764)
UNITED KINGDOM | Beaumont ABS Limited          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Payment for working capital to buyers $ 1,200        
Loss on disposal of business         $ (1,800)