Investment Securities (Held-to-maturity Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 46,399	$ 48,468
Gross Unrealized Gains	1,096	646
Gross Unrealized Losses	(360)	(672)
Held-to-maturity investment securities at fair value	47,135	48,442
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	3,833	3,841
Gross Unrealized Gains	430	448
Gross Unrealized Losses	(5)	(7)
Held-to-maturity investment securities at fair value	4,258	4,282
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	35,712	36,945
Gross Unrealized Gains	666	189
Gross Unrealized Losses	(298)	(394)
Held-to-maturity investment securities at fair value	36,080	36,740
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	6,854	7,682
Gross Unrealized Gains	0	9
Gross Unrealized Losses	(57)	(271)
Held-to-maturity investment securities at fair value	$ 6,797	$ 7,420