Commitments And Contingencies (Details)	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Other Commitments [Line Items]
Future minimum rental payments under leases, year one	$ 4,600,000
Future minimum rental payments under leases, year two	1,700,000
Future minimum rental payments under leases, year three	400,000
Rent expense incurred	$ 9,900,000	$ 8,800,000	$ 11,100,000
Number of compressors under capital lease agreement	20
Capital lease term	7 years
2019	$ 6,168,000
2020	6,168,000
2021	3,768,000
Maintenance	4,089,000
Interest	635,000
Capital leases, future minimum payments, average annual payment	$ 4,300,000
Capital lease fair market value percentage for purchase	10.00%
Repurchase of limited units outstanding	20.00%
Repurchase of limited units outstanding amount	$ 1,700	$ 2,900	$ 5,000
Drilling Equipment
Other Commitments [Line Items]
Other Commitment, Due in Next Twelve Months	$ 9,200,000