Securities - Cost of Restricted Stock (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Schedule of Investments [Line Items]
Total restricted stock	$ 5,329	$ 4,367	[1]
FRB Stock [Member]
Schedule of Investments [Line Items]
Total restricted stock	3,527	2,742
FHLB Stock [Member]
Schedule of Investments [Line Items]
Total restricted stock	$ 1,802	$ 1,625

[1] Derived from audited consolidated financial statements.