Fair Value Measurements - Summary of Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financial assets
Current derivative assets	$ 19	$ 3,694
Financial liabilities
Current derivative liabilities	(1,463)
Noncurrent derivative liabilities	(1,122)
Fair Value on a Recurring Basis [Member]
Financial assets
Current derivative assets	19	3,694
Net Recognized Assets	19	3,694
Financial liabilities
Current derivative liabilities	(1,463)
Noncurrent derivative liabilities	(1,122)
Net Recognized Liabilities	(2,585)
Fair Value on a Recurring Basis [Member] | Level 2 [Member]
Financial assets
Current derivative assets	19	3,694
Net Recognized Assets	19	$ 3,694
Financial liabilities
Current derivative liabilities	(1,463)
Noncurrent derivative liabilities	(1,122)
Net Recognized Liabilities	$ (2,585)