Deposits - Certificates of deposits and Scheduled maturities of time deposits - (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Deposits Abstract
Aggregate amounts of certificates of deposits in denominations of $250,000 or more	$ 109,500,000	$ 114,900,000	$ 143,000,000
Increased insurance limit on deposit accounts	250,000
Traditional, out-of-market brokered deposits	$ 12,400,000	$ 18,900,000	$ 19,900,000