Share-Based Compensation And Share Repurchase Plans (Tables)

12 Months Ended

Dec. 31, 2020

Share-Based Compensation And Share Repurchase Plans [Abstract]

Schedule Of Fair Value Of Options, Weighted Average Assumptions

	2020		2019		2018
Stock option exercise price	$	4.66	$	16.12	$	16.40
Risk-free interest rate		0.25%		2.42%		2.56%
Expected dividend yield		—		—		—
Expected option life in years		3.75		3.75		3.75
Expected volatility		51.83%		23.32%		24.99%
Weighted average fair value	$	1.80	$	3.50	$	3.80

Schedule Of Stock Options Outstanding And Exercisable

	Outstanding Stock Options
	Number of ‎Options		Weighted Average ‎Exercise Price				Weighted Average ‎Remaining Years of ‎Contractual Life	Aggregate ‎Intrinsic ‎Value
	Class A	Class B	Class A		Class B		Class A&B	Class A&B
Outstanding - January 1, 2018	524,589	—	$	12.50	$	—	3.15	$	3,054,325
Granted	126,840	—		16.40		—
Exercised	(60,000)	—		6.02		—			610,249
Expired	(4,960)	—		12.08		—
Outstanding - December 31, 2018	586,469	—	$	14.01	$	—	2.88	$	1,530,528
Granted	219,408	—		16.12		—
Exercised	(69,500)	—		13.42		—			185,175
Expired	(25,000)	—		13.42		—
Outstanding - December 31, 2019	711,377	—	$	14.74	$	—	2.79	$	136,350
Granted	38,803	—		4.66		—
Exercised	—	—		—		—			—
Expired	(36,701)	—		14.74		—
Outstanding - December 31, 2020	713,479	—	$	14.64	$	—	2.18	$	13,969

Summary Of Stock Options Vested And Unvested

	Vested and Unvested Stock Options
	Number of ‎Options		Weighted Average ‎Exercise Price				Weighted Average ‎Remaining Years of ‎Contractual Life	Aggregate ‎Intrinsic ‎Value
	Class A	Class B	Class A			Class B	Class A&B	Class A&B
Vested
December 31, 2020	418,435	—	$	13.87	$	—	1.64	$	—
December 31, 2019	273,866	—		12.59		—	1.87		136,350
December 31, 2018	231,124	—		12.38		—	2.28		1,306,643
Unvested
December 31, 2020	295,044	—	$	15.77	$	—	2.47	$	13,969
December 31, 2019	437,511	—		15.78		—	3.36		—
December 31, 2018	355,345	—		15.07		—	3.27		223,885

Schedule Of Restricted Stock Units Issued And Vested

	Number of RSUs					$ value of RSUs
	Granted	Vesting	Forfeited	Unvested	Granted		Vesting			Forfeited	Unvested
2016	68,153	67,372	781	—	$	815,160	$	805,760	$	9,400	$	—
2017	70,538	61,590	532	8,416		1,124,348		981,448		8,496		134,404
2018	97,600	74,292	2,102	21,206		1,581,512		1,199,232		34,240		348,040
2019	59,258	22,713	3,104	33,441		944,070		354,806		50,005		539,259
2020	401,966	—	818	401,148		1,756,002		—		5,002		1,751,000
Total	697,515	225,967	7,337	464,211	$	6,221,091	$	3,341,245	$	107,144	$	2,772,703