Commitments And Contingencies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Commitments [Line Items]
Lease expiration date	Dec. 31, 2021
Future minimum rental payments under leases, year one	$ 2,700,000
Future minimum rental payments under leases, year two	600,000
Future minimum rental payments under leases, year three	400,000
Future minimum rental payments under leases, year four	100,000
Rent expense incurred	$ 8,800,000	$ 11,100,000	$ 12,900,000
Number of compressors under capital lease agreement	20
Capital lease term	7 years
2018	$ 6,168,000
2019	6,168,000
2020	6,168,000
2021	3,768,000
Maintenance	5,874,000
Interest	1,174,000
Capital leases, future minimum payments, average annual payment	$ 4,200,000
Capital lease fair market value percentage for purchase	10.00%
Repurchase of limited units outstanding	20.00%
Repurchase of limited units outstanding amount	$ 2,900	$ 5,000	$ 118,000
Drilling Equipment
Other Commitments [Line Items]
Other Commitment, Due in Next Twelve Months	$ 3,900,000