Income Taxes Income Tax Provision Included in Other Income Expense on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Federal	$ 190	$ 370	$ 361
State	284	362	335
Federal	0	(47)	118
State	(14)	(40)	202
Provision for income taxes	$ 460	$ 645	$ 1,016