Qualified Affordable Housing Project Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Federal Home Loan Banks [Abstract]
Amortization Method Qualified Affordable Housing Project Investments	$ 3,200		$ 3,300
Qualified Affordable Housing Project Investments, Commitment	1,900		$ 1,900
Amortization Method Qualified Affordable Housing Project Investments, Amortization	57	$ 43
Affordable Housing Tax Credits and Other Tax Benefits Expected to Be Received	385
Affordable Housing Tax Credits and Other Tax Benefits, Amount	$ 95	$ 75