Investment Securities Available for Sale (Details) $ in Thousands	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	$ 327,268	$ 347,615	$ 356,910
Available-for-Sale	327,392	346,996	362,929
Gross Unrealized Gains	1,617	1,576	6,223
Gross Unrealized Losses	1,493	2,195	204
Available-For-Sale Securities, Pledged as Collateral	267,912	262,852	267,912
Maturities of Debt Securities, at Amortized Cost:
Within One Year	10,824
From 1 - 5 Years	261,543
From 5 - 10 Years	52,261
Over 10 Years	1,520
Maturities of Debt Securities, at Fair Value:
Within One Year	10,875
From 1 - 5 Years	261,719
From 5 - 10 Years	51,988
Over 10 Years	1,320
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	149,088	210,095	710
12 Months or Longer	800	10,186	2,537
Total	$ 149,888	$ 220,281	$ 3,247
Number of Securities in a Continuous Loss Position	52	147	6
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 1,293	$ 1,987	$ 4
12 Months or Longer	200	208	200
Total	1,493	2,195	204
U.S. Agency Obligations
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	146,914	147,110	155,859
Available-for-Sale	147,085	147,377	157,990
Gross Unrealized Gains	252	304	2,131
Gross Unrealized Losses	81	37	0
Maturities of Debt Securities, at Amortized Cost:
Within One Year	0
From 1 - 5 Years	146,914
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	0
From 1 - 5 Years	147,085
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	49,176	70,605	0
12 Months or Longer	0	0	0
Total	$ 49,176	$ 70,605	$ 0
Number of Securities in a Continuous Loss Position	13	19	0
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 81	$ 37	$ 0
12 Months or Longer	0	0	0
Total	81	37	0
State and Municipal Obligations
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	15,410	27,684	36,256
Available-for-Sale	15,441	27,690	36,425
Gross Unrealized Gains	31	24	169
Gross Unrealized Losses	0	18	0
Maturities of Debt Securities, at Amortized Cost:
Within One Year	5,482
From 1 - 5 Years	8,966
From 5 - 10 Years	442
Over 10 Years	520
Maturities of Debt Securities, at Fair Value:
Within One Year	5,483
From 1 - 5 Years	8,996
From 5 - 10 Years	442
Over 10 Years	520
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	543	12,165	0
12 Months or Longer	0	7,377	256
Total	$ 543	$ 19,542	$ 256
Number of Securities in a Continuous Loss Position	2	84	1
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 0	$ 13	$ 0
12 Months or Longer	0	5	0
Total	0	18	0
Mortgage-Backed Securities - Residential
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	161,324	168,189	157,926
Available-for-Sale	161,077	167,239	161,728
Gross Unrealized Gains	964	986	3,806
Gross Unrealized Losses	1,211	1,936	4
Maturities of Debt Securities, at Amortized Cost:
Within One Year	3,842
From 1 - 5 Years	105,663
From 5 - 10 Years	51,819
Over 10 Years	0
Maturities of Debt Securities, at Fair Value:
Within One Year	3,893
From 1 - 5 Years	105,638
From 5 - 10 Years	51,546
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	97,870	126,825	710
12 Months or Longer	0	0	0
Total	$ 97,870	$ 126,825	$ 710
Number of Securities in a Continuous Loss Position	34	40	2
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 1,211	$ 1,936	$ 4
12 Months or Longer	0	0	0
Total	1,211	1,936	4
Corporate and Other Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	2,500	3,512	5,749
Available-for-Sale	2,299	3,308	5,555
Gross Unrealized Gains	0	0	6
Gross Unrealized Losses	201	204	200
Maturities of Debt Securities, at Amortized Cost:
Within One Year	1,500
From 1 - 5 Years	0
From 5 - 10 Years	0
Over 10 Years	1,000
Maturities of Debt Securities, at Fair Value:
Within One Year	1,499
From 1 - 5 Years	0
From 5 - 10 Years	0
Over 10 Years	800
Securities in a Continuous Loss Position, at Fair Value:
Less than 12 Months	1,499	500	0
12 Months or Longer	800	2,809	2,281
Total	$ 2,299	$ 3,309	$ 2,281
Number of Securities in a Continuous Loss Position	3	4	3
Unrealized Losses on Securities in a Continuous Loss Position:
Less than 12 Months	$ 1	$ 1	$ 0
12 Months or Longer	200	203	200
Total	201	204	200
Mutual Funds and Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	1,120	1,120	1,120
Available-for-Sale	1,490	1,382	1,231
Gross Unrealized Gains	370	262	111
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	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
Fair Value, Measurements, Recurring
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale	327,392	346,996	362,929
Fair Value, Measurements, Recurring | U.S. Agency Obligations
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale	147,085	147,377	157,990
Fair Value, Measurements, Recurring | State and Municipal Obligations
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale	15,441	27,690	36,425
Fair Value, Measurements, Recurring | Corporate and Other Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale	2,299	3,308	5,555
Fair Value, Measurements, Recurring | Mutual Funds and Equity Securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	1,490
Available-for-Sale		1,382	1,231
US Treasury Securities | U.S. Agency Obligations
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	54,597	54,701
Available-for-Sale	54,676	54,706
Agency Securities | U.S. Agency Obligations
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	92,317	92,409	155,859
Available-for-Sale	92,409	92,671	157,990
Agency Securities | Mortgage-Backed Securities - Residential
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	3,740	3,694	10,318
Available-for-Sale	3,756	3,724	10,401
US Government-sponsored Enterprises Debt Securities | Mortgage-Backed Securities - Residential
Schedule of Available-for-sale Securities [Line Items]
Available-for-Sale	157,321	163,515	151,327
US Government-sponsored Enterprises Debt Securities | Mortgage-Backed Securities - Residential | US Government-sponsored Enterprises Debt Securities
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	$ 157,584	$ 164,495	$ 147,608