Income Taxes - Components of Low Income Housing Investment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Taxes
Low income housing tax credits	$ 111	$ 180	$ 222	$ 360
Low income housing investment losses	$ 118	$ 228	$ 235	$ 457