Income Taxes Income Tax Provision Included in Other Income Expense on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Federal	$ 305	$ 190	$ 370
State	35	284	362
Federal	0	0	(47)
State	(45)	(14)	(40)
Provision for income taxes	$ 295	$ 460	$ 645