Variable Interest Entities VIE Net Income or Loss and Tax Credits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CDE (NMTC)
Consolidated VIEs
VIE loss	$ (899)	$ (896)	$ (690)	$ (687)
Federal income tax credits	1,165	1,164	1,165	1,164
LIHTC
Consolidated VIEs
VIE loss	(251)	(271)	(503)	(541)
Federal income tax credits	$ 293	$ 317	$ 587	$ 635