Share-Based Compensation And Share Repurchase Plans (Tables)	12 Months Ended
	Dec. 31, 2021
Share-Based Compensation And Share Repurchase Plans [Abstract]
Schedule Of Fair Value Of Options, Weighted Average Assumptions	2021 2020 2019Stock option exercise price $ — $ 4.66 $ 16.12Risk-free interest rate 0.00% 0.25% 2.42%Expected dividend yield — — —Expected option life in years — 3.75 3.75Expected volatility 0.00% 51.83% 23.32%Weighted average fair value $ — $ 1.80 $ 3.50
Schedule Of Stock Options Outstanding And Exercisable	Outstanding Stock Options Number of‎Options Weighted Average‎Exercise Price Weighted Average‎Remaining Years of‎Contractual Life Aggregate‎Intrinsic‎Value Class A Class B Class A Class B Class A&B Class A&BOutstanding - January 1, 2019 586,469 — $ 14.01 $ — 2.88 $ 1,530,528Granted 219,408 — 16.12 — Exercised (69,500) — 13.42 — 185,175Expired (25,000) — 13.42 — Outstanding - December 31, 2019 711,377 — $ 14.74 $ — 2.79 $ 136,350Granted 38,803 — 4.66 — Exercised — — — — —Expired (36,701) — 14.74 — Outstanding - December 31, 2020 713,479 — $ 14.64 $ — 2.18 $ 13,969Granted — — — — Exercised (38,803) — 4.66 — 63,831Expired (157,332) — 11.87 — Outstanding - December 31, 2021 517,344 — $ 15.42 $ — 1.66 $ —
Summary Of Stock Options Outstanding And Exercisable	Vested and Unvested Stock Options Number of‎Options Weighted Average‎Exercise Price Weighted Average‎Remaining Years of‎Contractual Life Aggregate‎Intrinsic‎Value Class A Class B Class A Class B Class A&B Class A&BVested December 31, 2021 384,189 — $ 13.87 $ — 1.42 $ —December 31, 2020 418,435 — 13.87 — 1.64 —December 31, 2019 273,866 — 12.59 — 1.87 136,350Unvested December 31, 2021 133,155 — $ 15.65 $ — 2.29 $ —December 31, 2020 295,044 — 15.77 — 2.47 13,969December 31, 2019 437,511 — 15.78 — 3.36 —
Schedule Of Restricted Stock Units Issued And Vested	Number of RSUs $ value of RSUs Granted Vesting Forfeited Unvested Granted Vesting Forfeited Unvested2016 68,153 67,372 781 — $ 815,160 805,759 9,400 —2017 70,538 70,006 532 — 1,124,348 1,115,852 8,496 —2018 97,600 84,491 2,903 10,206 1,581,512 1,366,610 47,408 167,4932019 59,258 33,861 3,104 22,293 944,070 534,575 50,005 359,4902020 401,966 162,282 1,755 237,929 2,281,899 817,792 9,172 1,454,9362021 361,593 26,924 — 334,669 2,185,222 140,005 — 2,045,217Total 1,059,108 444,936 9,075 605,097 $ 8,932,211 $ 4,780,593 $ 124,481 $ 4,027,136