Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Common Stock
Numerator:
Distributed earnings									$ 31,432	$ 48,837	$ 46,564
Undistributed earnings									51,290	35,653	7,954
Basic									82,722	84,490	54,518
Diluted									$ 89,358	$ 90,803	$ 59,148
Denominator:
Weighted average shares outstanding - basic (in shares)									15,225	16,710	17,128
Assumed conversion of Class A Common Stock (in shares)									1,284	1,330	1,522
Dilutive awards and common stock equivalents (in shares)									529	503	282
Total weighted average diluted Common Stock (in shares)									17,038	18,543	18,932
Basic net earnings per share
Basic net earnings per share (in dollars per share)	$ 1.48	$ 1.51	$ 1.31	$ 1.14	$ 1.39	$ 1.35	$ 1.25	$ 1.07	$ 5.43	$ 5.06	$ 3.18
Diluted net earnings per share (in dollars per share)	1.42	1.46	1.27	1.11	1.35	1.31	1.21	1.04	$ 5.24	$ 4.90	$ 3.12
Class A Common Stock
Numerator:
Distributed earnings									$ 2,516	$ 3,609	$ 3,957
Undistributed earnings									4,120	2,704	673
Basic									$ 6,636	$ 6,313	$ 4,630
Denominator:
Weighted average shares outstanding - basic (in shares)									1,284	1,330	1,522
Total weighted average diluted Common Stock (in shares)									1,284	1,330	1,522
Basic net earnings per share
Basic net earnings per share (in dollars per share)	1.40	1.43	1.25	1.08	1.31	1.28	1.18	1.00	$ 5.17	$ 4.75	$ 3.04
Diluted net earnings per share (in dollars per share)	$ 1.39	$ 1.40	$ 1.22	$ 1.05	$ 1.33	$ 1.25	$ 1.16	$ 0.98	$ 5.07	$ 4.69	$ 3.04