Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current deferred tax assets	$ 2,602	$ 2,696
Non-current deferred tax assets	18,871	12,907
Non-current deferred tax liabilities	(22,537)	(25,982)
Net deferred tax assets	$ (1,064)
Net deferred tax (liabilities)		$ (10,379)