Investment Securities Available for Sale (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	$ 424,900	$ 453,675	$ 469,621
Available-for-Sale	429,230	457,606	478,775
Gross Unrealized Gains	5,066	5,078	9,528
Gross Unrealized Losses	736	1,147	374
Available-For-Sale Securities, Pledged as Collateral	329,039	243,769	274,433
Maturities of Debt Securities, at Amortized Cost
Within One Year	59,486
From 1 - 5 Years	344,237
From 5 - 10 Years	18,377
Over 10 Years	1,680
Maturities of Debt Securities at Fair Value
Within One Year	59,705
From 1 - 5 Years	347,660
From 5 - 10 Years	19,165
Over 10 Years	1,480
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	85,196	113,196	134,689
12 Months or Longer	17,232	56,350	1,481
Total	102,428	169,546	136,170
Number of Securities in a Continuous Loss Position, in number of securities	125	165	194
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	425	656	372
12 Months or Longer	311	491	2
Total	736	1,147	374
U.S. Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Gains	3	2	23
Gross Unrealized Losses	260	395	87
Maturities of Debt Securities, at Amortized Cost
Within One Year	0
From 1 - 5 Years	121,477
From 5 - 10 Years	0
Over 10 Years	0
Maturities of Debt Securities at Fair Value
Within One Year	0
From 1 - 5 Years	121,220
From 5 - 10 Years	0
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	50,778	60,664	94,909
12 Months or Longer	6,124	33,849	0
Total	56,902	94,513	94,909
Number of Securities in a Continuous Loss Position, in number of securities	16	26	28
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	222	336	87
12 Months or Longer	38	59	0
Total	260	395	87
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	121,477	136,868	132,217
Available-for-Sale	121,220	136,475	132,153
State and Municipal Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	125,165	127,224	104,304
Available-for-Sale	125,410	127,389	104,469
Gross Unrealized Gains	333	306	228
Gross Unrealized Losses	88	141	63
Maturities of Debt Securities, at Amortized Cost
Within One Year	49,942
From 1 - 5 Years	72,919
From 5 - 10 Years	1,624
Over 10 Years	680
Maturities of Debt Securities at Fair Value
Within One Year	49,991
From 1 - 5 Years	73,099
From 5 - 10 Years	1,640
Over 10 Years	680
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	17,937	29,967	31,325
12 Months or Longer	3,653	4,597	1,481
Total	21,590	34,564	32,806
Number of Securities in a Continuous Loss Position, in number of securities	87	107	154
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	72	120	61
12 Months or Longer	16	21	2
Total	88	141	63
Mortgage-Backed Securities - Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	160,023	171,321	219,067
Available-for-Sale	164,541	175,778	228,323
Gross Unrealized Gains	4,616	4,714	9,256
Gross Unrealized Losses	98	257	0
Maturities of Debt Securities, at Amortized Cost
Within One Year	9,544
From 1 - 5 Years	133,726
From 5 - 10 Years	16,753
Over 10 Years	0
Maturities of Debt Securities at Fair Value
Within One Year	9,714
From 1 - 5 Years	137,302
From 5 - 10 Years	17,525
Over 10 Years	0
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	10,613	15,190	3
12 Months or Longer	4,063	11,841	0
Total	14,676	27,031	3
Number of Securities in a Continuous Loss Position, in number of securities	9	13	1
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	81	108	0
12 Months or Longer	17	149	0
Total	98	257	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	30,600	31,500	35,300
Available-for-Sale	31,300	32,200	37,200
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	129,400	139,800	183,800
Available-for-Sale	133,200	143,600	191,100
Corporate and Other Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Securities, at Amortized Cost	17,115	17,142	12,913
Available-for-Sale	16,839	16,798	12,691
Gross Unrealized Gains	14	10	2
Gross Unrealized Losses	290	354	224
Maturities of Debt Securities, at Amortized Cost
Within One Year	0
From 1 - 5 Years	16,115
From 5 - 10 Years	0
Over 10 Years	1,000
Maturities of Debt Securities at Fair Value
Within One Year	0
From 1 - 5 Years	16,039
From 5 - 10 Years	0
Over 10 Years	800
Securities in a Continuous Loss Position, at Fair Value
Less than 12 Months	5,868	7,375	8,452
12 Months or Longer	3,392	6,063	0
Total	9,260	13,438	8,452
Number of Securities in a Continuous Loss Position, in number of securities	13	19	11
Unrealized Losses on Securities in a Continuous Loss Position
Less than 12 Months	50	92	224
12 Months or Longer	240	262	0
Total	290	354	224
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	1,220	1,166	1,139
Gross Unrealized Gains	100	46	19
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