Segment Information (Schedule Of Identifiable Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Feb. 02, 2021
Segment Reporting Information [Line Items]
Identifiable Assets	$ 1,191,012	$ 1,199,508	$ 1,456,804
Rentals [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	432,437	379,453
Well Services [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	533,327	636,256
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Identifiable Assets	$ 225,248	$ 183,799