Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax (expense) benefit	$ 22	$ (346)	$ 175	$ (210)
Effective income tax rate	(0.20%)		(0.50%)
Federal statutory income tax rate	34.00%		34.00%