Investment Securities (Details) - Investments classified by maturity date - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Investment securities available-for-sale:
Due in one year or less	$ 16,296
Due in one year or less	16,443
Due after one year through five years	30,271
Due after one year through five years	31,401
Due after five years through ten years	55,740
Due after five years through ten years	56,953
Due after ten years	51,793
Due after ten years	52,248
Total	220,130	$ 281,461
Total	224,214
Investment securities held-to-maturity:
Due after one year through five years	13,571
Due after one year through five years	13,888
Due after five years through ten years	76,126
Due after five years through ten years	78,980
Due after ten years	129,134
Due after ten years	133,120
Total	227,221	224,682
Total	234,493	231,445
Total investment securities	447,351
Total investment securities	458,707
Residential Mortgage Backed Securities [Member]
Investment securities available-for-sale:
Investment Securities Available-for-Sale: Amortized Cost	46,943
Investment Securities Available-for-Sale: Fair Value	48,091
Total	46,943	58,836
Investment securities held-to-maturity:
Investment Securities Held-to-Maturity: Amoritzed Cost	4,240
Investment Securities Held-to-Maturity: Fair Value	4,258
Total	4,258	5,983
Commercial Mortgage Backed Securities [Member]
Investment securities available-for-sale:
Investment Securities Available-for-Sale: Amortized Cost	2,996
Investment Securities Available-for-Sale: Fair Value	3,055
Total	2,996	3,042
Investment securities held-to-maturity:
Investment Securities Held-to-Maturity: Amoritzed Cost	4,150
Investment Securities Held-to-Maturity: Fair Value	4,247
Total	4,247	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	338
Total	376	376
Other Securities [Member]
Investment securities available-for-sale:
Investment Securities Available-for-Sale: Amortized Cost	15,715
Investment Securities Available-for-Sale: Fair Value	15,685
Total	$ 15,715	$ 12,941