Investment Securities (Details 5) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Cumulative roll forward of credit losses recognized in earnings for trust preferred securities
Beginning balance	$ 140	$ 140	$ 140
Ending balance	140	140	140
Trust preferred securities
Cumulative roll forward of credit losses recognized in earnings for trust preferred securities
Beginning balance	140	140	140
Ending balance	$ 140	$ 140	$ 140