Investment Securities Available for Sale (Details) $ in Thousands	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	$ 388,009	$ 361,962		$ 361,641
Available-for-Sale	391,817	366,139	$ 366,848	366,848
Gross Unrealized Gains	4,385	4,636		5,656
Gross Unrealized Losses	576	459		449
Available-For-Sale Securities, Pledged as Collateral	289,418	267,384		228,990
Maturities of Debt Securities, at Amortized Cost
Within One Year	25,142
From 1 - 5 Years	330,946
From 5 - 10 Years	29,116
Over 10 Years	1,684
Maturities of Debt Securities at Fair Value
Within One Year	25,481
From 1 - 5 Years	333,920
From 5 - 10 Years	29,681
Over 10 Years	1,490
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	43,022		54,488
12 Months or Longer	109,641	54,339		47,726
Total	$ 109,641	$ 97,361		$ 102,214
Number of Securities in a Continuous Loss Position, in number of securities	96	105		68
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 48		$ 64
12 Months or Longer	576	411		385
Total	576	459		449
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Gains	788	208		4
Gross Unrealized Losses	99	145		146
Maturities of Debt Securities, at Amortized Cost
Within One Year	0
From 1 - 5 Years	156,248
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities at Fair Value
Within One Year	0
From 1 - 5 Years	156,937
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		42,888
12 Months or Longer	35,149	28,020		33,031
Total	$ 35,149	$ 67,651		$ 75,919
Number of Securities in a Continuous Loss Position, in number of securities	10	22		24
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 48		$ 30
12 Months or Longer	99	97		116
Total	99	145		146
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	156,248	137,540		92,328
Available-for-Sale	156,937	137,603		92,186
State and Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	59,230	81,582		102,456
Available-for-Sale	59,303	81,730		102,862
Gross Unrealized Gains	117	187		413
Gross Unrealized Losses	43	39		7
Maturities of Debt Securities, at Amortized Cost
Within One Year	9,179
From 1 - 5 Years	48,283
From 5 - 10 Years	1,168
Over 10 Years	600
Maturities of Debt Securities at Fair Value
Within One Year	9,194
From 1 - 5 Years	48,341
From 5 - 10 Years	1,168
Over 10 Years	600
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	3,309		2,860
12 Months or Longer	16,401	14,035		4,223
Total	$ 16,401	$ 17,344		$ 7,083
Number of Securities in a Continuous Loss Position, in number of securities	71	65		24
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 0		$ 0
12 Months or Longer	43	39		7
Total	43	39		7
Mortgage-Backed Securities - Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	154,501	124,732		148,672
Available-for-Sale	157,641	128,827		153,770
Gross Unrealized Gains	3,350	4,100		5,143
Gross Unrealized Losses	210	5		45
Maturities of Debt Securities, at Amortized Cost
Within One Year	11,037
From 1 - 5 Years	115,431
From 5 - 10 Years	27,948
Over 10 Years	84
Maturities of Debt Securities at Fair Value
Within One Year	11,357
From 1 - 5 Years	117,681
From 5 - 10 Years	28,513
Over 10 Years	90
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	0	82		8,740
12 Months or Longer	47,859	1,546		1,935
Total	$ 47,859	$ 1,628		$ 10,675
Number of Securities in a Continuous Loss Position, in number of securities	1	3		8
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 0		$ 34
12 Months or Longer	210	5		11
Total	210	5		45
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	30,800	23,000		29,400
Available-for-Sale	31,700	23,600		30,100
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	123,700	101,700		119,300
Available-for-Sale	126,000	105,200		123,700
Corporate and Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	16,910	16,988		17,065
Available-for-Sale	16,691	16,725		16,829
Gross Unrealized Gains	5	7		15
Gross Unrealized Losses	224	270		251
Maturities of Debt Securities, at Amortized Cost
Within One Year	4,926
From 1 - 5 Years	10,984
From 5 - 10 Years	0
Over 10 Years	1,000
Maturities of Debt Securities at Fair Value
Within One Year	4,930
From 1 - 5 Years	10,961
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	10,232	10,738		8,537
Total	$ 10,232	$ 10,738		$ 8,537
Number of Securities in a Continuous Loss Position, in number of securities	14	15		12
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	$ 0	$ 0		$ 0
12 Months or Longer	224	270		251
Total	224	270		251
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	1,245	1,254		1,201
Gross Unrealized Gains	125	134		81
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