Investments in Qualified Affordable Housing Projects (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Carrying value of qualified affordable housing project investments	$ 3,361,000			$ 3,361,000		$ 6,331,000
Funding obligation related to qualified affordable housing projects		$ 2,450,000
Funding obligation related to qualified affordable housing projects		$ 0
Tax credit amortization	262,000		$ 324,000	523,000	$ 648,000
Tax credits and other benefits	(388,000)		(471,000)	(848,000)	(942,000)
Total	$ (126,000)		$ (147,000)	$ (325,000)	$ (294,000)