Qualified Affordable Housing Projects (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Investments in Affordable Housing Projects [Abstract]
Investment in qualified affordable housing projects	$ 12,600,000		$ 12,600,000		$ 15,000,000
Open commitments	0		0		$ 0
Amortization expense included in noninterest expense	800,000	$ 900,000	2,500,000	$ 2,800,000
Tax credits	$ 900,000	$ 1,000,000	$ 2,700,000	$ 3,000,000