Earnings per Share - Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Computation of basic earnings per share [Abstract]
Net Income for Basic Earnings per Share		$ 2,523	$ 4,603	$ 5,338	$ 8,790
Basic Weighted Average Shares Outstanding (in shares)	[1]	16,969,301	17,255,593	17,159,027	17,248,045
Basic Earnings per Share (in dollars per share)		$ 0.15	$ 0.27	$ 0.31	$ 0.51
Common Class A
Computation of basic earnings per share [Abstract]
Net Income for Basic Earnings per Share		$ 2,517	$ 4,597	$ 5,324	$ 8,779
Basic Weighted Average Shares Outstanding (in shares)		16,925,776	17,233,829	17,114,879	17,227,164
Participating Shares of Restricted Class A Common Stock
Computation of basic earnings per share [Abstract]
Net Income for Basic Earnings per Share		$ 6	$ 6	$ 14	$ 11
Basic Weighted Average Shares Outstanding (in shares)	[2]	43,525	21,764	44,148	20,881

[1] The Company issues restricted shares of Class A common stock and restricted Class B units that have non-forfeitable dividend rights. Under the "two-class method," these shares and units are considered participating securities and are required to be included in the computation of basic and diluted earnings per share.

[2] Certain unvested shares of Class A common stock granted to employees have nonforfeitable rights to dividends and therefore participate fully in the results of the Company from the date they are granted. They are included in the computation of basic earnings per share using the two-class method for participating securities