Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Current income tax expense (benefit)	$ 923	$ (1)	$ 913	$ (2)
Operating loss carry-forward available	$ 23,900		$ 23,900
U.S. Federal, State and Local Tax Authorities [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carry-forward					$ 75,400
United Kingdom Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carry-forward					$ 1,600