Investments in Affordable Housing Limited Partnerships (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Funding installments, installment period	2 years
Other non-interest expense
Schedule of Equity Method Investments [Line Items]
Expense related to investments in affordable housing limited partnerships	$ 653	$ 352
Income tax expense
Schedule of Equity Method Investments [Line Items]
Affordable housing tax credits and other tax benefits	590	$ 390
Other assets
Schedule of Equity Method Investments [Line Items]
Investment in affordable housing limited partnerships	15,100		$ 15,700
Other liabilities
Schedule of Equity Method Investments [Line Items]
Funding obligation related to investments	$ 12,000		$ 12,000