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Transactions with Related Parties (Narrative) (Details) - Affiliated Entity - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Poseidon
Related Party Transaction [Line Items]
Related party transaction, revenues	$ 3,860	$ 3,242	$ 7,098	$ 7,028
Due from related parties	1,500		1,500		$ 2,400
Related party transaction, costs and expenses	254	238	509	478
Poseidon | Asset Management Arrangement
Related Party Transaction [Line Items]
Related party transaction, revenues	2,400	2,400	4,900	4,700
ANSAC
Related Party Transaction [Line Items]
Related party transaction, revenues	97,328	71,329	185,510	139,284
Due from related parties	89,923		89,923		$ 64,799
Related party transaction, costs and expenses	$ 2,340	$ 519	$ 3,185	$ 697

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