CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Class A Common Stock Common stock	Class B Common Stock Common stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest	Total
Balance at the beginning of the period at Dec. 31, 2018	$ 377		$ 126,418	$ 51,683	$ (820)	$ 184,670	$ 362,328
Balance at the beginning of the period (shares) at Dec. 31, 2018	37,654	37,236
Statement of Stockholders'/Members' Equity
Adjustments to prior periods			14,035		488	(14,523)
Member distribution						(235)	(235)
Effect of CW Unit redemptions	$ 85		43,899		(50)	(43,934)
Effect of CW Unit redemptions (in shares)	8,518	(8,518)
Adjustment to deferred tax asset from CW Unit redemptions			(8,232)				(8,232)
Additional paid-in capital related to tax receivable agreement			13,580				13,580
Equity award vestings	$ 2		(1,474)				(1,472)
Equity award vestings (in shares)	219
Other comprehensive income (loss)					123	147	270
Stock-based compensation			1,676				1,676
Net income				26,807		21,639	48,446
Balance at the end of the period at Mar. 31, 2019	$ 464		189,902	78,490	(259)	147,764	416,361
Balance at the end of the period (shares) at Mar. 31, 2019	46,391	28,718
Balance at the beginning of the period at Dec. 31, 2019	$ 472		194,456	132,990	(452)	188,929	516,395
Balance at the beginning of the period (shares) at Dec. 31, 2019	47,159	27,958
Statement of Stockholders'/Members' Equity
Member distribution						(2,203)	(2,203)
Additional paid-in capital related to tax receivable agreement			(94)				(94)
Equity award vestings	$ 2		(221)			(1,138)	(1,357)
Equity award vestings (in shares)	239
Other comprehensive income (loss)					(615)	(468)	(1,083)
Stock-based compensation			1,240			733	1,973
Cash dividends declared				(4,303)			(4,303)
Net income				18,983		14,115	33,098
Balance at the end of the period at Mar. 31, 2020	$ 474		$ 195,381	$ 147,670	$ (1,067)	$ 199,968	$ 542,426
Balance at the end of the period (shares) at Mar. 31, 2020	47,398	27,958