Investment Securities, Held-to-maturity Securities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Amortized cost and fair value of the held to maturity securities [Abstract]
Amortized Cost	$ 74,179	$ 86,215
Gross Unrecognized Gains	4,514	4,228
Gross Unrecognized Losses	0	138
Fair Value	78,693	90,305
Mortgage-backed securities and collateralized mortgage obligations-residential [Member]
Amortized cost and fair value of the held to maturity securities [Abstract]
Amortized Cost	64,223	76,270
Gross Unrecognized Gains	3,333	2,744
Gross Unrecognized Losses	0	138
Fair Value	67,556	78,876
Corporate bonds [Member]
Amortized cost and fair value of the held to maturity securities [Abstract]
Amortized Cost	9,956	9,945
Gross Unrecognized Gains	1,181	1,484
Gross Unrecognized Losses	0	0
Fair Value	$ 11,137	$ 11,429