Investment Securities - Held-to-Maturity and Available-for-Sale, Scheduled Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Held-to-maturity Securities [Abstract]
Securities Held-to-Maturity, Amortized Cost	$ 41,058	$ 54,347
Securities Held-to-Maturity, Gross Unrealized Gains	287	470
Securities Held-to-Maturity, Gross Unrealized Losses	(22)	(52)
Securities Held-to-Maturity, Fair Value	41,323	54,765
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost	332,031	311,651
Securities Available-for-Sale, Gross Unrealized Gain	4,089	4,160
Securities Available-for-Sale, Gross Unrealized Loss	(2,620)	(1,528)
Securities Available-for-Sale, Fair Value	333,500	314,283
U.S. Treasuries [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	4,977	4,972
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	(32)	(127)
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	4,945	4,845
Securities Available-for-Sale, Amortized Cost	4,977	4,972
Securities Available-for-Sale, Debt Securities, Gross Unrealized Gain	0	0
Securities Available-for-Sale, Debt Securities, Gross Unrealized Losses	(32)	(127)
Securities Available-for-Sale, Debt Securities, Fair Value	4,945	4,845
U.S. Government Corporations and Agencies [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	104,893	122,328
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	491	48
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	(13)	(532)
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	105,371	121,844
Securities Available-for-Sale, Amortized Cost	104,893	122,328
Securities Available-for-Sale, Debt Securities, Gross Unrealized Gain	491	48
Securities Available-for-Sale, Debt Securities, Gross Unrealized Losses	(13)	(532)
Securities Available-for-Sale, Debt Securities, Fair Value	105,371	121,844
State and Political Subdivisions [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 year	0	600
Securities Available-for-Sale, Gross Unrealized Gains, Within 1 year	0	2
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 year	0	0
Securities Available-for-Sale, Fair Value, Within 1 year	0	602
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	15,664	12,326
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	91	17
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	(15)	(59)
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	15,740	12,284
Securities Available-for-Sale, Amortized Cost, After 5 years to 10 years	51,605	49,554
Securities Available-for-Sale, Gross Unrealized Gains, After 5 years to 10 years	1,446	1,616
Securities Available-for-Sale, Gross Unrealized Losses, After 5 years to 10 years	(34)	(77)
Securities Available-for-Sale, Fair Value, After 5 years to 10 years	53,017	51,093
Securities Available-for-Sale, Amortized Cost, Over 10 years	38,428	37,004
Securities Available-for-Sale, Gross Unrealized Gains, Over 10 years	1,285	1,792
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 years	(50)	(1)
Securities Available-for-Sale, Fair Value, Over 10 years	39,663	38,795
Securities Available-for-Sale, Amortized Cost	105,697	99,484
Securities Available-for-Sale, Debt Securities, Gross Unrealized Gain	2,822	3,427
Securities Available-for-Sale, Debt Securities, Gross Unrealized Losses	(99)	(137)
Securities Available-for-Sale, Debt Securities, Fair Value	108,420	102,774
Residential Mortgage Backed Securities [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	9,767	5,066
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	110	17
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	0	0
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	9,877	5,083
Securities Available-for-Sale, Amortized Cost, After 5 years to 10 years	0	4,856
Securities Available-for-Sale, Gross Unrealized Gains, After 5 years to 10 years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, After 5 years to 10 years	0	(32)
Securities Available-for-Sale, Fair Value, After 5 years to 10 years	0	4,824
Securities Available-for-Sale, Amortized Cost, Over 10 years	3,598	3,661
Securities Available-for-Sale, Gross Unrealized Gains, Over 10 years	69	75
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 years	0	0
Securities Available-for-Sale, Fair Value, Over 10 years	3,667	3,736
Securities Available-for-Sale, Amortized Cost	13,365	13,583
Securities Available-for-Sale, Debt Securities, Gross Unrealized Gain	179	92
Securities Available-for-Sale, Debt Securities, Gross Unrealized Losses	0	(32)
Securities Available-for-Sale, Debt Securities, Fair Value	13,544	13,643
Collateralized Mortgage Obligations [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, Over 10 years	3,352	3,810
Securities Available-for-Sale, Gross Unrealized Gains, Over 10 years	0	0
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 years	(49)	(85)
Securities Available-for-Sale, Fair Value, Over 10 years	3,303	3,725
Securities Available-for-Sale, Amortized Cost	3,352	3,810
Securities Available-for-Sale, Debt Securities, Gross Unrealized Gain	0	0
Securities Available-for-Sale, Debt Securities, Gross Unrealized Losses	(49)	(85)
Securities Available-for-Sale, Debt Securities, Fair Value	3,303	3,725
Corporate Bonds [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost, Within 1 year	0	4,998
Securities Available-for-Sale, Gross Unrealized Gains, Within 1 year	0	22
Securities Available-for-Sale, Gross Unrealized Losses, Within 1 year	0	0
Securities Available-for-Sale, Fair Value, Within 1 year	0	5,020
Securities Available-for-Sale, Amortized Cost, After 1 year to 5 years	19,768	29,505
Securities Available-for-Sale, Gross Unrealized Gains, After 1 year to 5 years	80	88
Securities Available-for-Sale, Gross Unrealized Losses, After 1 year to 5 years	(165)	(244)
Securities Available-for-Sale, Fair Value, After 1 year to 5 years	19,683	29,349
Securities Available-for-Sale, Amortized Cost, After 5 years to 10 years	10,403	20,442
Securities Available-for-Sale, Gross Unrealized Gains, After 5 years to 10 years	1	0
Securities Available-for-Sale, Gross Unrealized Losses, After 5 years to 10 years	(157)	(371)
Securities Available-for-Sale, Fair Value, After 5 years to 10 years	10,247	20,071
Securities Available-for-Sale, Amortized Cost, Over 10 years	60,000	0
Securities Available-for-Sale, Gross Unrealized Gains, Over 10 years	88	0
Securities Available-for-Sale, Gross Unrealized Losses, Over 10 years	(2,105)	0
Securities Available-for-Sale, Fair Value, Over 10 years	57,983	0
Securities Available-for-Sale, Amortized Cost	90,171	54,945
Securities Available-for-Sale, Debt Securities, Gross Unrealized Gain	169	110
Securities Available-for-Sale, Debt Securities, Gross Unrealized Losses	(2,427)	(615)
Securities Available-for-Sale, Debt Securities, Fair Value	87,913	54,440
Money Market Mutual Funds [Member]
Available-for-sale Securities [Abstract]
Securities Available-for-Sale, Amortized Cost	9,020	11,675
Securities Available-for-Sale, Debt Securities, Gross Unrealized Gain	0	0
Securities Available-for-Sale, Debt Securities, Gross Unrealized Losses	0	0
Securities Available-for-Sale, Debt Securities, Fair Value	9,020	11,675
Equity Securities [Member]
Available-for-sale Securities [Abstract]
Equity Securities Available-for-Sale, Amortized Cost	556	854
Equity Securities Available-for-Sale, Gross Unrealized Gains	428	483
Equity Securities Available-for-Sale, Gross Unrealized Loss	0	0
Equity Securities Available-for-Sale, Fair Value	984	1,337
Corporate Bonds [Member]
Held-to-maturity Securities [Abstract]
Securities Held-to-Maturity, Amortized Cost, Within 1 year	17,066	13,088
Securities Held-to-Maturity, Gross Unrealized Gains, Within 1 year	176	82
Securities Held-to-Maturity, Gross Unrealized Losses, Within 1 year	0	0
Securities Held-to-Maturity, Fair Value, Within 1 year	17,242	13,170
Securities Held-to-Maturity, Amortized Cost, After 1 year to 5 years	23,992	41,259
Securities Held-to-Maturity, Gross Unrealized Gains, After 1 year to 5 years	111	388
Securities Held-to-Maturity, Gross Unrealized Losses, After 1 year to 5 years	(22)	(52)
Securities Held-to-Maturity, Fair Value, After 1 year to 5 years	24,081	41,595
Securities Held-to-Maturity, Amortized Cost	41,058	54,347
Securities Held-to-Maturity, Gross Unrealized Gains	287	470
Securities Held-to-Maturity, Gross Unrealized Losses	(22)	(52)
Securities Held-to-Maturity, Fair Value	$ 41,323	$ 54,765