Investment Securities Available for Sale (Details) $ in Thousands	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	$ 392,858	$ 361,962	$ 370,539
Available-for-Sale	397,559	366,139	374,335
Gross Unrealized Gains	4,921	4,636	4,568
Gross Unrealized Losses	221	459	772
Available-For-Sale Securities, Pledged as Collateral	348,115	267,384	292,850
Maturities of Debt Securities, at Amortized Cost
Within One Year	44,556
From 1 - 5 Years	339,152
From 5 - 10 Years	6,430
Over 10 Years	1,600
Maturities of Debt Securities at Fair Value
Within One Year	44,943
From 1 - 5 Years	343,039
From 5 - 10 Years	6,931
Over 10 Years	1,400
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	43,022	96,946
12 Months or Longer	25,339	54,339	45,926
Total	$ 25,339	$ 97,361	$ 142,872
Number of Securities in a Continuous Loss Position, in number of securities	16	105	75
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 48	$ 314
12 Months or Longer	221	411	458
Total	221	459	772
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Gains	1,269	208	1
Gross Unrealized Losses	4	145	435
Maturities of Debt Securities, at Amortized Cost
Within One Year	0
From 1 - 5 Years	161,253
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities at Fair Value
Within One Year	0
From 1 - 5 Years	162,518
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	39,631	90,968
12 Months or Longer	12,996	28,020	27,994
Total	$ 12,996	$ 67,651	$ 118,962
Number of Securities in a Continuous Loss Position, in number of securities	3	22	35
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 48	$ 296
12 Months or Longer	4	97	139
Total	4	145	435
U.S. Agency Obligations [Member] | U.S. Government Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	161,253	137,540	134,485
Available-for-Sale	162,518	137,603	134,051
State and Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	55,263	81,582	91,799
Available-for-Sale	55,486	81,730	92,150
Gross Unrealized Gains	223	187	355
Gross Unrealized Losses	0	39	4
Maturities of Debt Securities, at Amortized Cost
Within One Year	22,968
From 1 - 5 Years	30,696
From 5 - 10 Years	999
Over 10 Years	600
Maturities of Debt Securities at Fair Value
Within One Year	23,019
From 1 - 5 Years	30,868
From 5 - 10 Years	999
Over 10 Years	600
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	3,309	450
12 Months or Longer	406	14,035	2,665
Total	$ 406	$ 17,344	$ 3,115
Number of Securities in a Continuous Loss Position, in number of securities	1	65	18
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 0	$ 0
12 Months or Longer	0	39	4
Total	0	39	4
Mortgage-Backed Securities - Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	158,351	124,732	126,108
Available-for-Sale	161,637	128,827	130,101
Gross Unrealized Gains	3,292	4,100	4,046
Gross Unrealized Losses	6	5	53
Maturities of Debt Securities, at Amortized Cost
Within One Year	16,168
From 1 - 5 Years	136,752
From 5 - 10 Years	5,431
Over 10 Years	0
Maturities of Debt Securities at Fair Value
Within One Year	16,504
From 1 - 5 Years	139,201
From 5 - 10 Years	5,932
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	82	5,528
12 Months or Longer	4,775	1,546	4,515
Total	$ 4,775	$ 1,628	$ 10,043
Number of Securities in a Continuous Loss Position, in number of securities	1	3	7
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 0	$ 18
12 Months or Longer	6	5	35
Total	6	5	53
Mortgage-Backed Securities - Residential [Member] | U.S. Government Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	27,500	23,000	26,000
Available-for-Sale	28,100	23,600	26,600
Mortgage-Backed Securities - Residential [Member] | US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	130,800	101,700	100,100
Available-for-Sale	133,500	105,200	103,500
Corporate and Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	16,871	16,988	17,027
Available-for-Sale	16,672	16,725	16,756
Gross Unrealized Gains	12	7	9
Gross Unrealized Losses	211	270	280
Maturities of Debt Securities, at Amortized Cost
Within One Year	5,420
From 1 - 5 Years	10,451
From 5 - 10 Years	0
Over 10 Years	1,000
Maturities of Debt Securities at Fair Value
Within One Year	5,420
From 1 - 5 Years	10,452
From 5 - 10 Years	0
Over 10 Years	800
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	0	0
12 Months or Longer	7,162	10,738	10,752
Total	$ 7,162	$ 10,738	$ 10,752
Number of Securities in a Continuous Loss Position, in number of securities	11	15	15
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 0	$ 0
12 Months or Longer	211	270	280
Total	211	270	280
Mutual Funds and Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	1,120	1,120	1,120
Available-for-Sale	1,246	1,254	1,277
Gross Unrealized Gains	125	134	157
Gross Unrealized Losses	0	0	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	0	0
12 Months or Longer	0	0	0
Total	$ 0	$ 0	$ 0
Number of Securities in a Continuous Loss Position, in number of securities	0	0	0
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 0	$ 0
12 Months or Longer	0	0	0
Total	$ 0	$ 0	$ 0