Investment Securities Available for Sale (Details) $ in Thousands	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	$ 383,206	$ 401,278	$ 387,640
Available-for-Sale	388,247	402,309	393,133
Gross Unrealized Gains	5,263	2,717	5,735
Gross Unrealized Losses	222	1,686	243
Available-For-Sale Securities, Pledged as Collateral	328,123	310,857	284,708
Maturities of Debt Securities, at Amortized Cost
Within One Year	39,707
From 1 - 5 Years	325,320
From 5 - 10 Years	15,393
Over 10 Years	1,666
Maturities of Debt Securities at Fair Value
Within One Year	39,883
From 1 - 5 Years	329,720
From 5 - 10 Years	15,940
Over 10 Years	1,471
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	12,369	184,276	0
12 Months or Longer	1,797	13,017	26,242
Total	$ 14,166	$ 197,293	$ 26,242
Number of Securities in a Continuous Loss Position, in number of securities	12	89	106
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 19	$ 1,440	$ 0
12 Months or Longer	203	246	243
Total	222	1,686	243
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Gains	1,750	264	1,049
Gross Unrealized Losses	0	414	22
Maturities of Debt Securities, at Amortized Cost
Within One Year	0
From 1 - 5 Years	155,896
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities at Fair Value
Within One Year	0
From 1 - 5 Years	157,646
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	76,802	0
12 Months or Longer	0	0	13,937
Total	$ 0	$ 76,802	$ 13,937
Number of Securities in a Continuous Loss Position, in number of securities	0	21	46
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 413	$ 0
12 Months or Longer	0	1	22
Total	0	414	22
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	155,896	155,932	150,500
Available-for-Sale	157,646	155,782	151,527
State and Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	49,382	52,306	73,886
Available-for-Sale	49,543	52,408	74,095
Gross Unrealized Gains	161	105	217
Gross Unrealized Losses	0	3	9
Maturities of Debt Securities, at Amortized Cost
Within One Year	23,325
From 1 - 5 Years	24,550
From 5 - 10 Years	907
Over 10 Years	600
Maturities of Debt Securities at Fair Value
Within One Year	23,341
From 1 - 5 Years	24,695
From 5 - 10 Years	907
Over 10 Years	600
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	1,766	4,289	0
12 Months or Longer	0	1,443	6,581
Total	$ 1,766	$ 5,732	$ 6,581
Number of Securities in a Continuous Loss Position, in number of securities	2	19	7
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 2	$ 0
12 Months or Longer	0	1	9
Total	0	3	9
Mortgage-Backed Securities - Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	164,905	177,376	145,185
Available-for-Sale	168,110	178,588	149,510
Gross Unrealized Gains	3,224	2,236	4,325
Gross Unrealized Losses	19	1,024	0
Maturities of Debt Securities, at Amortized Cost
Within One Year	12,648
From 1 - 5 Years	137,705
From 5 - 10 Years	14,486
Over 10 Years	66
Maturities of Debt Securities at Fair Value
Within One Year	12,806
From 1 - 5 Years	140,200
From 5 - 10 Years	15,033
Over 10 Years	71
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	10,603	99,569	0
12 Months or Longer	0	903	22
Total	$ 10,603	$ 100,472	$ 22
Number of Securities in a Continuous Loss Position, in number of securities	9	30	31
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 19	$ 1,023	$ 0
12 Months or Longer	0	1	0
Total	19	1,024	0
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	13,100	15,700	34,100
Available-for-Sale	13,300	15,800	35,000
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	151,800	161,700	111,100
Available-for-Sale	154,800	162,700	114,500
Corporate and Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	11,903	14,544	16,949
Available-for-Sale	11,715	14,299	16,756
Gross Unrealized Gains	15	0	19
Gross Unrealized Losses	203	245	212
Maturities of Debt Securities, at Amortized Cost
Within One Year	3,734
From 1 - 5 Years	7,169
From 5 - 10 Years	0
Over 10 Years	1,000
Maturities of Debt Securities at Fair Value
Within One Year	3,736
From 1 - 5 Years	7,179
From 5 - 10 Years	0
Over 10 Years	800
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	3,616	0
12 Months or Longer	1,797	10,671	5,702
Total	$ 1,797	$ 14,287	$ 5,702
Number of Securities in a Continuous Loss Position, in number of securities	1	19	22
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 2	$ 0
12 Months or Longer	203	243	212
Total	203	245	212
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	1,233	1,232	1,245
Gross Unrealized Gains	113	112	125
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