Discontinued Operations (Assets And Liabilities Of Discontinued Operation) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets	$ 28,491	$ 37,528
Pumpco Member
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts receivable, net	6,254	7,469
Property, plant and equipment, net	22,076	29,328
Other assets	161	731
Total assets held for sale	28,491	37,528
Accounts payable	473	652
Accrued expenses	2,982	4,268
Other liabilities	223	687
Total liabilities	$ 3,678	$ 5,607