XML 123 R109.htm IDEA: XBRL DOCUMENT v3.20.4
Parent Company Only Condensed Financial Statements - Condensed Statements of Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
 [1]
Condensed Statement of Income Captions [Line Items]        
Net income (loss) $ (7,865) $ (26,907) $ 1,996 $ (22,739)
Other comprehensive income (loss)   1,013 1,081 (82)
Total comprehensive loss attributable to Medallion Financial Corp.   (33,770) (681) $ (25,128)
Parent Company [Member]        
Condensed Statement of Income Captions [Line Items]        
Net income (loss) (10,172) (34,783) (1,762)  
Other comprehensive income (loss) (82) 1,013 1,081  
Total comprehensive loss attributable to Medallion Financial Corp. $ (10,254) $ (33,770) $ (681)  
[1] Balance includes the nine months ended December 31, 2018 under Bank Holding Company Accounting and the three months ended March 31, 2018 under Investment Company Accounting.