Condensed Consolidated Statements of Partners' Capital and Stockholders' Equity - USD ($) $ in Thousands	Common Shareholders	Series B Unitholders	Common Stock	Additional Paid-in Capital	Accumulated Earnings	Total
Balance at Dec. 31, 2017	$ (19,866)	$ 35,474				$ 15,608
Partner' Capital and Stockholders' Equity
Net income and comprehensive income	12,392	413				12,805
Equity-based compensation	7,777					7,777
Distributions to shareholders	(13,964)	(783)				(14,747)
Balance at Mar. 31, 2018	(13,661)	35,104				21,443
Balance at Dec. 31, 2017	(19,866)	35,474				15,608
Partner' Capital and Stockholders' Equity
Net income and comprehensive income						45,220
Balance at Sep. 30, 2018	(10,163)	35,289				25,126
Balance at Mar. 31, 2018	(13,661)	35,104				21,443
Partner' Capital and Stockholders' Equity
Net income and comprehensive income	13,881	506				14,387
Equity-based compensation	7,777					7,777
Distributions to shareholders	(20,109)	(414)				(20,523)
Balance at Jun. 30, 2018	(12,112)	35,196				23,084
Partner' Capital and Stockholders' Equity
Net income and comprehensive income	17,430	598				18,028
Equity-based compensation	7,795					7,795
Distributions to shareholders	(23,276)	(505)				(23,781)
Balance at Sep. 30, 2018	(10,163)	35,289				25,126
Balance at Dec. 31, 2018	(41,969)	72,830				30,861
Partner' Capital and Stockholders' Equity
Net (loss) and comprehensive (income) pre-acquisition	(13,549)					(13,549)
Equity-based compensation pre-acquisition	7,034					7,034
Exchange of common shares for shares of common stock and cash consideration paid	79,027	(69,110)	$ 5,066	$ 4,002,898		4,017,881
Equity-based compensation				4,389		4,389
Distributions to shareholders	(30,543)	(3,720)				(34,263)
Net income and comprehensive income					$ 23,197	23,197
Balance at Mar. 31, 2019			5,066	4,007,287	23,197	4,035,550
Balance at Dec. 31, 2018	$ (41,969)	$ 72,830				30,861
Partner' Capital and Stockholders' Equity
Net income and comprehensive income						(210,555)
Balance at Sep. 30, 2019			5,034	3,715,002	(197,006)	3,523,030
Balance at Mar. 31, 2019			5,066	4,007,287	23,197	4,035,550
Partner' Capital and Stockholders' Equity
Dividends to shareholders				(152,180)		(152,180)
Equity-based compensation				21,543		21,543
Issuance of common units upon vesting of equity-based compensation awards, net of units withheld for income taxes			2	(1,830)		(1,828)
Net income and comprehensive income					69,274	69,274
Balance at Jun. 30, 2019			5,068	3,874,820	92,471	3,972,359
Partner' Capital and Stockholders' Equity
Dividends to shareholders				(154,284)		(154,284)
Net income and comprehensive income						(289,477)
Equity-based compensation				20,129		20,129
Issuance of common units upon vesting of equity-based compensation awards, net of units withheld for income taxes			1	(179)		(178)
Repurchases and retirement of common stock			(35)	(25,484)		(25,519)
Net income and comprehensive income					(289,477)	(289,477)
Balance at Sep. 30, 2019			$ 5,034	$ 3,715,002	$ (197,006)	$ 3,523,030