Investment Securities (Details) - Investments classified by maturity date - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment securities available-for-sale:
Due in one year or less	$ 21,828
Due in one year or less	22,070
Due after one year through five years	34,670
Due after one year through five years	36,039
Due after five years through ten years	77,279
Due after five years through ten years	80,288
Due after ten years	53,423
Due after ten years	53,874
Total	258,057	$ 281,461
Total	264,098
Investment securities held-to-maturity:
Due in one year or less	4,982
Due in one year or less	4,983
Due after one year through five years	11,202
Due after one year through five years	11,354
Due after five years through ten years	73,367
Due after five years through ten years	74,931
Due after ten years	134,067
Due after ten years	136,969
Total	232,557	224,682
Total	237,205	231,445
Total investment securities	490,614
Total investment securities	501,296
Residential Mortgage Backed Securities [Member]
Investment securities available-for-sale:
Investment Securities Available-for-Sale: Amortized Cost	53,624
Investment Securities Available-for-Sale: Fair Value	54,734
Total	53,624	58,836
Investment securities held-to-maturity:
Investment Securities Held-to-Maturity: Amoritzed Cost	4,751
Investment Securities Held-to-Maturity: Fair Value	4,725
Total	4,725	5,983
Commercial Mortgage Backed Securities [Member]
Investment securities available-for-sale:
Investment Securities Available-for-Sale: Amortized Cost	3,012
Investment Securities Available-for-Sale: Fair Value	3,023
Total	3,012	3,042
Investment securities held-to-maturity:
Investment Securities Held-to-Maturity: Amoritzed Cost	4,188
Investment Securities Held-to-Maturity: Fair Value	4,243
Total	4,243	4,316
Equity Securities [Member]
Investment securities available-for-sale:
Investment Securities Available-for-Sale: Amortized Cost	376
Investment Securities Available-for-Sale: Fair Value	327
Total	376	376
Other Securities [Member]
Investment securities available-for-sale:
Investment Securities Available-for-Sale: Amortized Cost	13,845
Investment Securities Available-for-Sale: Fair Value	13,743
Total	$ 13,845	$ 12,941