Stock-Based Compensation And Stock Repurchases (Tables)	9 Months Ended
	Sep. 30, 2021
Stock-Based Compensation And Stock Repurchases [Abstract]
Summary Of Stock Options Outstanding And Exercisable	Outstanding Stock Options - Class A Shares Number‎of Options Weighted‎Average‎Exercise Price Weighted‎Average‎Remaining‎Years of‎Contractual‎Life Aggregate‎Intrinsic‎Value Class A Class A Class A Class ABalance - December 31, 2019 711,377 $ 14.74 2.79 $ 136,350Granted 38,803 4.66 — —Exercised — — — —Forfeited (36,701) 14.74 — —Balance - December 31, 2020 713,479 $ 14.64 2.18 $ 13,969Granted — — — —Exercised (38,803) — — —Forfeited (157,332) 11.87 — —Balance - September 30, 2021 517,344 $ 15.35 1.77 $ —
Schedule Of Restricted Stock Units Issued And Vested	Outstanding Restricted Stock Units RSU Grants (in units) Vested, Unvested, Forfeited,Grant Date Directors Management Total‎Grants September 30,‎2021 September 30,‎2021 September 30,‎2021March 10, 2016 35,147 27,381 62,528 62,264 — 264April 11, 2016 — 5,625 5,625 5,108 — 517March 23, 2017 30,681 32,463 63,144 62,612 — 532August 29, 2017 — 7,394 7,394 7,394 — —January 2, 2018 29,393 — 29,393 29,393 — —April 12, 2018 — 29,596 29,596 21,085 6,540 1,971April 13, 2018 — 14,669 14,669 11,003 3,666 —July 6, 2018 — 932 932 — — 932November 7, 2018 23,010 — 23,010 23,010 — —March 13, 2019 — 24,366 24,366 10,632 10,630 3,104March 14, 2019 — 23,327 23,327 11,664 11,663 —May 7, 2019 11,565 — 11,565 11,565 — —March 10, 2020 — 287,163 287,163 48,416 237,929 818December 14, 2020 — 43,260 43,260 — 42,716 544December 16, 2020 60,084 11,459 71,543 — 71,543 —April 5, 2021 — 262,830 262,830 — 262,830 —April 19, 2021 — 22,888 22,888 — 22,888 —August 11, 2021 26,924 — 26,924 — 26,924 — Total 216,804 793,353 1,010,157 304,146 697,329 8,682