Income Tax Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax [Abstract]
Increase (Decrease) in Deferred Income Taxes			$ (7,200)
Income Tax Expense (Benefit)	$ 479	$ 463	802	$ 526
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			$ 7,200