Variable Interest Entities Amortization Expense and Tax Credits and Other Tax Benefits (Details) - LIHTC - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Investments in Affordable Housing Projects [Abstract]
Amortization expense	$ 354	$ 251	$ 609	$ 503
Tax credits and other tax benefits recognized	$ 431	$ 391	$ 823	$ 782