Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current deferred tax assets	$ 1,835	$ 2,696
Non-current deferred tax assets	19,392	12,907
Non-current deferred tax liabilities	(22,910)	(25,982)
Net deferred tax (liabilities)	$ (1,683)	$ (10,379)