Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Jan. 04, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Held-to-maturity securities, fair value	$ 358,225			$ 312,802
Loans, allowance for loan losses	$ 6,080	$ 6,030		5,506	$ 5,038	$ 5,643	$ 5,963
Preferred Stock, Series C [Member]
Preferred stock, Series C, liquidation preference			$ 16,372	$ 16,372