Fair Value Measurement - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Gross Fair Value, Assets	$ 3,879	$ 64,534
Effect of Counterparty Netting, Assets	(3,879)	0
Net Carrying Value on Balance Sheet, Assets	0	64,534
Gross Fair Value, Liabilities	20,598	0
Effect of Counterparty Netting, Liabilities	(3,879)	0
Net Carrying Value on Balance Sheet, Liabilities	16,719	0
Commodity Derivative Instruments | Fair Value Measurements, Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Effect of Counterparty Netting, Assets		0
Net Carrying Value on Balance Sheet, Assets	0	64,534
Effect of Counterparty Netting, Liabilities	0	0
Net Carrying Value on Balance Sheet, Liabilities	16,719	0
Commodity Derivative Instruments | Fair Value Measurements, Recurring Basis | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Gross Fair Value, Assets	0	64,534
Gross Fair Value, Liabilities	$ 16,719	$ 0