Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 359,187		$ 362,172		$ 400,956
Gross Unrealized Gains	6,194		5,030		4,228
Gross Unrealized Losses	197		660		5,441
Fair/Book Value	365,184		366,542		399,743
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value	38,031		81,467		127,107
12 Months or More Fair Value	25,942		33,574		18,455
Total Fair Value	63,973		115,041		145,562
Less Than 12 Months Unrealized Loss	29		154		4,545
12 Months or More Unrealized Loss	168		506		896
Total Unrealized Loss	197		660		5,441
Schedule of Held-to-maturity Securities [Line Items]
Book Value	63,463		63,863		65,655
Gross Unrealized Gains	766		782		711
Gross Unrealized Losses	11		10		257
Fair Value	64,218		64,635		66,109
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months Fair Value	1,340		849		9,038
Twelve Months or More Fair Value	0		876		0
Total Fair Value	1,340		1,725		9,038
Less than 12 Months Unrealized Loss	11		5		257
12 Months or Longer Unrealized Loss	0		5		0
Total Unrealized Loss	11		10		257
Obligations of States and Political Subdivisions [Member]
Schedule of Held-to-maturity Securities [Line Items]
Book Value	61,324		61,716		62,890
Gross Unrealized Gains	766		782		711
Gross Unrealized Losses	11		10		257
Fair Value	62,079		62,488		63,344
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months Fair Value	1,340		849		9,038
Twelve Months or More Fair Value	0		876		0
Total Fair Value	1,340		1,725		9,038
Less than 12 Months Unrealized Loss	11		5		257
12 Months or Longer Unrealized Loss	0		5		0
Total Unrealized Loss	11		10		257
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Book Value					4	[1]
Gross Unrealized Gains					0	[1]
Gross Unrealized Losses					0	[1]
Fair Value					4	[1]
Other [Member]
Schedule of Held-to-maturity Securities [Line Items]
Book Value	2,139		2,147		2,761
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	0		0		0
Fair Value	2,139		2,147		2,761
Government Agency & Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	68,064		78,051		18,242
Gross Unrealized Gains	69		61		184
Gross Unrealized Losses	1		3		0
Fair/Book Value	68,132		78,109		18,426
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value	24,998		66,980
12 Months or More Fair Value	0		0
Total Fair Value	24,998		66,980
Less Than 12 Months Unrealized Loss	1		3
12 Months or More Unrealized Loss	0		0
Total Unrealized Loss	1		3
US Treasury Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	19,818
Gross Unrealized Gains	148
Gross Unrealized Losses	0
Fair/Book Value	19,966
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	270,820	[1]	283,636	[1]	331,434	[1]
Gross Unrealized Gains	5,977	[1]	4,969	[1]	3,674	[1]
Gross Unrealized Losses	196	[1]	657	[1]	5,378	[1]
Fair/Book Value	276,601	[1]	287,948	[1]	329,730	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value	13,033		14,487		123,313
12 Months or More Fair Value	25,942		33,574		15,981
Total Fair Value	38,975		48,061		139,294
Less Than 12 Months Unrealized Loss	28		151		4,506
12 Months or More Unrealized Loss	168		506		872
Total Unrealized Loss	196		657		5,378
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost					49,045
Gross Unrealized Gains					370
Gross Unrealized Losses					63
Fair/Book Value					49,352
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value					3,794
12 Months or More Fair Value					2,474
Total Fair Value					6,268
Less Than 12 Months Unrealized Loss					39
12 Months or More Unrealized Loss					24
Total Unrealized Loss					63
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	485		485		2,235
Gross Unrealized Gains	0		0		0
Gross Unrealized Losses	0		0		0
Fair/Book Value	$ 485		$ 485		$ 2,235

[1] All Mortgage Backed Securities consist of securities collateralized by residential real estate and were issued by an agency or government sponsored entity of the U.S. government.