Derivative Instruments (Fair Values of the Partnership's Derivative Instruments Table) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Assets	$ 826
Gross Amounts Recognized, Liabilities	(50,240)
Current portion of derivative liabilities
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Liabilities	(34,806)
Gross Amounts Offset, Liabilities	7
Net Amount Presented, Liabilities	(34,799)
Long-term portion of derivative liabilities
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Liabilities	(15,434)
Gross Amounts Offset, Liabilities	819
Net Amount Presented, Liabilities	(14,615)
Total derivative liabilities
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Liabilities	(50,240)
Gross Amounts Offset, Liabilities	826
Net Amount Presented, Liabilities	(49,414)
Current portion of derivative assets
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Assets	7
Gross Amounts Offset, Assets	(7)
Current portion of derivative assets | Predecessor
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Assets		$ 159,460
Net Amount Presented, Assets		159,460
Long-term portion of derivative assets
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Assets	819
Gross Amounts Offset, Assets	(819)
Long-term portion of derivative assets | Predecessor
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Assets		198,262
Net Amount Presented, Assets		198,262
Total derivative assets
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Assets	826
Gross Amounts Offset, Assets	$ (826)
Total derivative assets | Predecessor
Derivatives Fair Value [Line Items]
Gross Amounts Recognized, Assets		357,722
Net Amount Presented, Assets		$ 357,722