Shareholders' Equity and Dividends (Details Textual)		3 Months Ended						9 Months Ended
	Aug. 23, 2018 Vote $ / shares shares	Sep. 30, 2020 USD ($) Vote $ / shares shares	Jun. 30, 2020 USD ($) $ / shares	Mar. 31, 2020 USD ($) $ / shares	Sep. 30, 2019 USD ($) $ / shares	Jun. 30, 2019 USD ($) $ / shares	Mar. 31, 2019 USD ($) $ / shares	Sep. 30, 2020 USD ($) Vote $ / shares shares	Sep. 30, 2019 USD ($) $ / shares	Dec. 31, 2019 $ / shares shares
Shareholders Equity and Dividends (Textual)
Distributions of non-controlling interest holders | $		$ 1,200,000	$ 1,000,000	$ 5,400,000	$ 6,346,000	$ 7,397,000	$ 8,559,000	$ 7,600,000	$ 22,300,000
Preferred stock, shares issued		0						0		0
Preferred stock, shares outstanding		0						0		0
Preferred stock, par value | $ / shares		$ 0.0001						$ 0.0001		$ 0.0001
Preferred stock, shares authorized		1,000,000						1,000,000		1,000,000
Dividends amount per share | $ / shares		$ 0.03	$ 0.025	$ 0.135	$ 0.15	$ 0.175	$ 0.20
Subsidiaries [Member] | General Partner [Member] | OpCo [Member]
Shareholders Equity and Dividends (Textual)
Ownership percentage		100.00%						100.00%
Subsidiaries [Member] | Limited Partner [Member] | OpCo [Member]
Shareholders Equity and Dividends (Textual)
Ownership percentage		54.00%						54.00%
Warrants [Member]
Shareholders Equity and Dividends (Textual)
Stock issued common units to contributors								40,000,000
Business combination, description								In addition to the above, the Contributors will be entitled to receive earn-out consideration to be paid in the form of OpCo Common Units (with a corresponding number of shares of Class C Common Stock) if the volume-weighted average price of the trading days during any thirty (30) calendar days (the “30-Day VWAP”) of the Class A Common Stock equals or exceeds certain hurdles set forth in the Contribution Agreement. If the 30-Day VWAP of the Class A Common Stock is $12.50 or more per share at any time within the seven years following the closing, Royal LP will receive (i) an additional 10 million OpCo Common Units (and an equivalent number of shares of Class C Common Stock), plus (ii) an amount of OpCo Common Units (and an equivalent number of shares of Class C Common Stock) equal to (x) the amount by which annual cash dividends paid on each share of Class A Common Stock exceeds $0.50 in each year between the closing and the date the first earn-out is achieved (with any dividends paid in the stub year in which the first earn-out is achieved annualized for purposes of determining what portion of such dividends would have, on an annual basis, exceeded $0.50), multiplied by 10 million, (y) divided by $12.50. If the 30-Day VWAP of the Class A Common Stock is $15.00 or more per share at any time within the seven years following the closing (which $15.00 threshold will be reduced by the amount by which annual cash dividends paid on each share of Class A Common Stock exceeds $0.50 in each year between the closing and the date the earn-out is achieved, but not below $12.50), the Contributors will receive an additional 10 million OpCo Common Units (and an equivalent number of Class C Common Stock).  Upon recognition of the earn-out, as there is no consideration received, the Company would record the payment of the earn-out as adjustments through equity (non-controlling interest and additional-paid-in-capital).
Consideration received | $								$ 0
Warrants [Member] | Royal Entities [Member] | Subsidiaries [Member]
Shareholders Equity and Dividends (Textual)
Additional common units may be issued		10,000,000						10,000,000
Private Placement Warrants [Member]
Shareholders Equity and Dividends (Textual)
Warrant outstanding, shares	7,500,000	7,500,000						7,500,000
Warrants, description								Each Private Placement Warrant is exercisable for one share of Class A Common Stock at a price of $11.34.  The Private Placement Warrants are identical to the Public Warrants discussed above, except (i) they will not be redeemable by the Company so long as they are held by the Sponsor and (ii) they may be exercisable by the holders on a cashless basis.  At September 30, 2020, there were 7,500,000 Private Placement Warrants outstanding
Warrants, number of common stocks purchased by each warrant	1
Warrants, exercise price | $ / shares	$ 1.00
Warrant to purchase shares of common stock exercise price | $ / shares	$ 11.34
Public Warrants [Member]
Shareholders Equity and Dividends (Textual)
Warrant outstanding, shares		13,749,998						13,749,998
Warrants, description								Each Public Warrant entitles the holder to purchase one share of Class A Common Stock at a price of $11.50 per share.
Warrants, outstanding, term		5 years						5 years
Redemption price per warrant | $ / shares		$ 0.01						$ 0.01
Redemption of warrants notice period								30 days
Redemption of warrants threshold consecutive trading days								20 days
Public Warrants [Member] | Maximum [Member]
Shareholders Equity and Dividends (Textual)
Redemption of warrants threshold trading days								30 days
Class A common stock [Member]
Shareholders Equity and Dividends (Textual)
Common stock, shares issued		46,094,183						46,094,183		45,963,716
Common stock, shares outstanding		46,094,183						46,094,183		45,963,716
Common stock, shares authorized		240,000,000						240,000,000		240,000,000
Common stock, par value | $ / shares		$ 0.0001						$ 0.0001		$ 0.0001
Common stock voting, description								Holders of the Company’s Class A Common Stock are entitled to one vote for each share
Common stock, number of votes per share | Vote		1						1
Class A common stock [Member] | Royal Entities [Member] | Subsidiaries [Member]
Shareholders Equity and Dividends (Textual)
Common units redemption ratio	100.00%
Class A common stock [Member] | Warrants [Member]
Shareholders Equity and Dividends (Textual)
Common units redemption ratio								100.00%
Class A common stock [Member] | Public Warrants [Member]
Shareholders Equity and Dividends (Textual)
Warrants, number of common stocks purchased by each warrant		1						1
Warrants, exercise price | $ / shares		$ 11.50						$ 11.50
Class A common stock [Member] | Public Warrants [Member] | Minimum [Member]
Shareholders Equity and Dividends (Textual)
Redemption of warrants common stock trigger price per share | $ / shares								$ 18.00
Class C common stock [Member]
Shareholders Equity and Dividends (Textual)
Common stock, shares issued		40,000,000						40,000,000		40,000,000
Common stock, shares outstanding		40,000,000						40,000,000		40,000,000
Common stock, shares authorized		120,000,000						120,000,000		120,000,000
Common stock, par value | $ / shares		$ 0.0001						$ 0.0001		$ 0.0001
Common stock, number of votes per share | Vote		1						1
Class C common stock [Member] | Royal Entities [Member]
Shareholders Equity and Dividends (Textual)
Common stock, number of votes per share | Vote	1
Extraordinary Dividends [Member] | Public Warrants [Member]
Shareholders Equity and Dividends (Textual)
Warrants, exercise price | $ / shares					11.34	11.38			$ 11.34
Common stock dividends paid, period								365 days
Extraordinary dividend threshold limit | $ / shares		$ 0.50						$ 0.50
Dividends amount per share | $ / shares					$ 0.04	$ 0.12