Segment Reporting - Summary of Concentration Risk (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Concentration Risk [Line Items]
Revenue	$ 785,636	$ 832,828	$ 785,461
Customer Concentration Risk [Member] | RMC [Member]
Concentration Risk [Line Items]
Revenue	341,500	98,700	17,000
Customer Concentration Risk [Member] | Ocean Partners [Member]
Concentration Risk [Line Items]
Revenue	168,900	176,400	161,000
Customer Concentration Risk [Member] | Asahi Formerly Johnson Matthey [Member]
Concentration Risk [Line Items]
Revenue	125,300	323,800	272,100
Customer Concentration Risk [Member] | Argor-Heraeus
Concentration Risk [Line Items]
Revenue	49,300	23,300	79,900
Customer Concentration Risk [Member] | Toronto Dominion Bank
Concentration Risk [Line Items]
Revenue	26,500	61,900	88,600
Customer Concentration Risk [Member] | Techemet Metal Trading [Member]
Concentration Risk [Line Items]
Revenue	$ 0	$ 62,200	$ 81,800