Schedule II - Condensed Financial Information of Registrant - Condensed Statements of Financial Position Additional Information (Details) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Class A
Condensed Financial Statements, Captions [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	7,500,000	7,500,000
Common stock, shares issued (in shares)	3,436,020	3,436,020
Common stock, shares outstanding (in shares)	3,436,020	3,436,020
Class B
Condensed Financial Statements, Captions [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000	200,000
Common stock, shares issued (in shares)	200,000	200,000
Common stock, shares outstanding (in shares)	200,000	200,000
The Company | Class A
Condensed Financial Statements, Captions [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	7,500,000	7,500,000
Common stock, shares issued (in shares)	3,436,020	3,436,020
Common stock, shares outstanding (in shares)	3,436,020	3,436,020
The Company | Class B
Condensed Financial Statements, Captions [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	200,000	200,000
Common stock, shares issued (in shares)	200,000	200,000
Common stock, shares outstanding (in shares)	200,000	200,000