Low-Income Housing Tax Credits (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) Fund	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Fund	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) Fund
Investments in Affordable Housing Projects [Abstract]
Affordable Housing Program, Number of Investments | Fund	4		4		4
Amortization Method Qualified Affordable Housing Project Investments	$ 3,965		$ 3,965		$ 4,185
Qualified Affordable Housing Project Investments, Commitment	2,961		$ 2,961		$ 2,961
Affordable Housing Investment Commitments, Term Expiration Year			2032
Expected Affordable Housing Tax Credits, Amount			$ 398
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ 126	$ 95	$ 348	$ 316