Variable Interest Entities Amortization Expense and Tax Credits and Other Tax Benefits (Details) - LIHTC - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Investments in Affordable Housing Projects [Abstract]
Amortization expense	$ 258	$ 177	$ 867	$ 680
Tax credits and other tax benefits recognized	$ 322	$ 363	$ 1,145	$ 1,145