Condensed Consolidated and Combined Statement of Changes in Shareholders' and Members' Equity - USD ($) $ in Thousands	Total	Members' Contributed Capital	Additional Paid-in Capital	Accumulated Deficit	Class A Common Stock	Class A Common Stock Common Stock	Class B Common Stock	Class B Common Stock Common Stock
Beginning balance (in shares) at Dec. 31, 2018						0		0
Beginning balance at Dec. 31, 2018	$ 373,948		$ (3,057)	$ 168,277		$ 0		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to shareholders	534			534
Ending balance (in shares) at Mar. 31, 2019						0		0
Ending balance at Mar. 31, 2019	377,984		(3,057)	172,313		$ 0		$ 0
Beginning balance at Dec. 31, 2018		$ 208,728
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to predecessor	3,502			3,502
Ending balance at Mar. 31, 2019		208,728
Beginning balance (in shares) at Dec. 31, 2019					34,040,934	34,041,000	22,847,045	22,847,000
Beginning balance at Dec. 31, 2019	317,319		323,578	(6,599)		$ 340		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares surrendered for tax withholdings on vesting equity awards (in shares)						(7,000)
Conversion of shares of Class B Common Stock to Class A Common Stock (in shares)						140,000		(140,000)
Conversion of shares of Class B Common Stock to Class A Common Stock	1,526		1,524			$ 2
Deferred tax asset arising from Conversion of shares of Class B Common Stock to Class A Common Stock	204		204
Share-based compensation	3,402		3,402
Dividends declared	(12,945)			(12,945)
Dividend equivalent rights declared	(596)			(596)
Net income attributable to shareholders	4,706			4,706
Adjustment of temporary equity to carrying value	206,017		206,017
Ending balance (in shares) at Mar. 31, 2020					34,173,819	34,174,000	22,706,711	22,707,000
Ending balance at Mar. 31, 2020	519,633		$ 534,725	$ (15,434)		$ 342		$ 0
Beginning balance at Dec. 31, 2019		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to predecessor	$ 0
Ending balance at Mar. 31, 2020		$ 0