Low-Income Housing Tax Credits (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) Fund	Dec. 31, 2015 USD ($) Fund
Low-Income Housing Tax Credits [Abstract]
Number of housing equity funds | Fund	4	4
$3.9 million	$ 3,885	$ 4,185
Additional committed capital calls expected	$ 2,542	2,961
Expected expiration of investment term	2032
Amortization Method Qualified Affordable Housing Project Investments, Amortization	$ 300,000	219,000
Tax credits received	384
Tax credits and other tax benefits recognized	$ 486	$ 365