Revenue - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Revenue by Geographic Area [Line Items]
Revenues	$ 446,159	$ 466,709	$ 437,553
Africa [Member]
Revenue by Geographic Area [Line Items]
Revenues	63,409		62,792
United Kingdom [Member]
Revenue by Geographic Area [Line Items]
Revenues	38,757		43,180
Norway [Member]
Revenue by Geographic Area [Line Items]
Revenues	45,277		52,294
Asia Pacific [Member]
Revenue by Geographic Area [Line Items]
Revenues	49,561		37,547
Brazil [Member]
Revenue by Geographic Area [Line Items]
Revenues	30,351		20,653
Other Geographical [Member]
Revenue by Geographic Area [Line Items]
Revenues	23,048		20,435
Non-US [Member]
Revenue by Geographic Area [Line Items]
Revenues	250,403		236,901
UNITED STATES
Revenue by Geographic Area [Line Items]
Revenues	$ 195,756		$ 200,652