Fair Value Measurements - Summary of Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financial liabilities
Derivative liability	$ 4,595
Derivative liability	1,575
Financial assets
Derivative asset		$ 3,694
Fair Value on a Recurring Basis [Member]
Financial liabilities
Derivative liability	4,595
Derivative liability	1,575
Total financial liabilities	6,170
Financial assets
Derivative asset		3,694
Total financial assets		3,694
Level 2 [Member] | Fair Value on a Recurring Basis [Member]
Financial liabilities
Derivative liability	4,595
Derivative liability	1,575
Total financial liabilities	$ 6,170
Financial assets
Derivative asset		3,694
Total financial assets		$ 3,694