Revenue and Accounts Receivable (Disaggregation Of Revenues, By Type) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Total Revenues	$ 197,307	$ 210,385	$ 607,022	$ 674,995
Rentals [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	97,857	113,201	305,799	334,433
Well Services [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	99,450	97,184	301,223	340,562
Services [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	82,343	80,956	237,367	280,376
Services [Member] | Rentals [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	16,119	17,073	56,129	52,093
Services [Member] | Well Services [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	66,224	63,883	181,238	228,283
Rentals Services [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	77,131	89,348	234,552	260,319
Rentals Services [Member] | Rentals [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	74,360	84,682	221,592	248,404
Rentals Services [Member] | Well Services [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	2,771	4,666	12,960	11,915
Product Sales [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	37,833	40,081	135,103	134,300
Product Sales [Member] | Rentals [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	7,378	11,446	28,078	33,936
Product Sales [Member] | Well Services [Member]
Disaggregation of Revenue [Line Items]
Total Revenues	$ 30,455	$ 28,635	$ 107,025	$ 100,364