Restatement of Previously Issued Consolidated Financial Statements - Statement of Shareholders' Equity and Partners' Capital (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	$ 236,395	$ 255,014	$ 289,157
Distributions to partners			(143,788)
Net income prior to Transactions			81,074
Recapitalization in connection with the Transactions			(10,805)
Net income post Transactions			47,833
Stock-based compensation	3,592	2,548
Dividend equivalent rights paid	(100)	(154)
Distributions to non-controlling interests	(10,200)	(27,703)	(4,101)
Dividends to shareholders	(11,734)	(30,293)	(4,356)
Net income	10,448	36,983	128,907
Balance	228,401	236,395	255,014
As Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	245,026	269,714	289,157
Distributions to partners			(143,788)
Net income prior to Transactions			81,074
Recapitalization in connection with the Transactions			31,695
Net income post Transactions			20,033
Stock-based compensation	3,592	2,548
Dividend equivalent rights paid	(100)	(154)
Distributions to non-controlling interests	(10,200)	(27,703)	(4,101)
Dividends to shareholders	(11,734)	(30,293)	(4,356)
Net income	5,320	30,914	101,107
Balance	231,904	245,026	269,714
Adjustments [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	(8,631)	(14,700)
Recapitalization in connection with the Transactions			(42,500)
Net income post Transactions			27,800
Net income	5,128	6,069	27,800
Balance	(3,503)	(8,631)	(14,700)
Class A common stock [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	$ 5	$ 5
Balance, shares	45,963,716	45,855,000
Recapitalization in connection with the Transactions			$ 5
Recapitalization in connection with the Transactions, shares			45,855,000
Vested restricted stock grants, shares	143,466	109,000
Balance	$ 5	$ 5	$ 5
Balance, shares	46,107,183	45,963,716	45,855,000
Class A common stock [Member] | As Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	$ 5	$ 5
Balance, shares	45,964,000	45,855,000
Recapitalization in connection with the Transactions			$ 5
Recapitalization in connection with the Transactions, shares			45,855,000
Vested restricted stock grants, shares	143,000	109,000
Balance	$ 5	$ 5	$ 5
Balance, shares	46,107,000	45,964,000	45,855,000
Class C common stock [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	$ 4	$ 4
Balance, shares	40,000,000	40,000,000
Recapitalization in connection with the Transactions			$ 4
Recapitalization in connection with the Transactions, shares			40,000,000
Balance	$ 4	$ 4	$ 4
Balance, shares	40,000,000	40,000,000	40,000,000
Class C common stock [Member] | As Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	$ 4	$ 4
Balance, shares	40,000,000	40,000,000
Recapitalization in connection with the Transactions			$ 4
Recapitalization in connection with the Transactions, shares			40,000,000
Balance	$ 4	$ 4	$ 4
Balance, shares	40,000,000	40,000,000	40,000,000
Additional Paid-in Capital
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	$ 117,561	$ 115,167
Recapitalization in connection with the Transactions			$ 115,167
Stock-based compensation	3,592	2,548
Dividend equivalent rights paid	(100)	(154)
Balance	121,053	117,561	115,167
Additional Paid-in Capital | As Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	129,127	137,866
Recapitalization in connection with the Transactions			137,866
Stock-based compensation	3,592	2,548
Dividend equivalent rights paid	(100)	(154)
Dividends to shareholders	(9,162)	(11,133)
Balance	123,457	129,127	137,866
Additional Paid-in Capital | Adjustments [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	(11,566)	(22,699)
Recapitalization in connection with the Transactions			(22,699)
Dividends to shareholders	9,162	11,133
Balance	(2,404)	(11,566)	(22,699)
Partners Capital
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance			288,528
Distributions to partners			(143,750)
Net income prior to Transactions			80,959
Recapitalization in connection with the Transactions			(225,737)
Partners Capital | As Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance			288,528
Distributions to partners			(143,750)
Net income prior to Transactions			80,959
Recapitalization in connection with the Transactions			(225,737)
Noncontrolling Interest
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	96,089	107,228	629
Distributions to partners			(38)
Net income prior to Transactions			115
Recapitalization in connection with the Transactions			99,756
Net income post Transactions			10,867
Distributions to non-controlling interests	(10,200)	(27,703)	(4,101)
Net income	2,748	16,564
Balance	88,637	96,089	107,228
Noncontrolling Interest | As Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	115,890	127,029	629
Distributions to partners			(38)
Net income prior to Transactions			115
Recapitalization in connection with the Transactions			119,557
Net income post Transactions			10,867
Distributions to non-controlling interests	(10,200)	(27,703)	(4,101)
Net income	2,748	16,564
Balance	108,438	115,890	127,029
Noncontrolling Interest | Adjustments [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	(19,801)	(19,801)
Recapitalization in connection with the Transactions			(19,801)
Balance	(19,801)	(19,801)	(19,801)
Retained Earnings
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	22,736	32,610
Net income post Transactions			36,966
Dividends to shareholders	(11,734)	(30,293)	(4,356)
Net income	7,700	20,419
Balance	18,702	22,736	32,610
Retained Earnings | As Previously Reported [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance		4,810
Net income post Transactions			9,166
Dividends to shareholders	(2,572)	(19,160)	(4,356)
Net income	2,572	14,350
Balance			4,810
Retained Earnings | Adjustments [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Balance	22,736	27,800
Net income post Transactions			27,800
Dividends to shareholders	(9,162)	(11,133)
Net income	5,128	6,069
Balance	$ 18,702	$ 22,736	$ 27,800