Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Available-for-sale securities [Abstract]
Fair/Book Value, Total	$ 404,639		$ 417,991
Held To Maturity Securities [Abstract]
Book Value	68,505		68,392
Fair Value	68,690
Available-for-sale Securities [Member]
Available-for-sale securities [Abstract]
Amortized Cost	408,897		405,914
Gross Unrealized Gains	3,455		12,099
Gross Unrealized Losses	7,713		22
Fair/Book Value, Total	404,639		417,991
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value	211,033		7,984
12 Months or More Fair Value	2,457		0
Total Fair Value	213,490		7,984
Less Than 12 Months Unrealized Loss	7,672		22
12 Months or More Unrealized Loss	41		0
Total Unrealized Loss	7,713		22
Held-to-maturity Securities [Member]
Held To Maturity Securities [Abstract]
Book Value	68,505		68,392
Gross Unrealized Gains	812		2,308
Gross Unrealized Losses	627		3
Fair Value	68,690		70,697
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value	9,518		528
12 Months or More Fair Value	0		0
Total Fair Value	9,518		528
Less Than 12 Months Unrealized Loss	627		3
12 Months or More Unrealized Loss	0		0
Total Unrealized Loss	627		3
Government Agency & Government Sponsored Entities [Member] | Available-for-sale Securities [Member]
Available-for-sale securities [Abstract]
Amortized Cost	28,287		26,546
Gross Unrealized Gains	149		277
Gross Unrealized Losses	0		0
Fair/Book Value, Total	28,436		26,823
Obligations of States and Political Subdivisions [Member] | Available-for-sale Securities [Member]
Available-for-sale securities [Abstract]
Amortized Cost			5,665
Gross Unrealized Gains			0
Gross Unrealized Losses			0
Fair/Book Value, Total			5,665
Obligations of States and Political Subdivisions [Member] | Held-to-maturity Securities [Member]
Held To Maturity Securities [Abstract]
Book Value	65,685		65,694
Gross Unrealized Gains	812		2,296
Gross Unrealized Losses	627		3
Fair Value	65,870		67,987
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value	9,518		528
12 Months or More Fair Value	0		0
Total Fair Value	9,518		528
Less Than 12 Months Unrealized Loss	627		3
12 Months or More Unrealized Loss	0		0
Total Unrealized Loss	627		3
Mortgage Backed Securities [Member] | Available-for-sale Securities [Member]
Available-for-sale securities [Abstract]
Amortized Cost	329,469	[1]	341,212	[1]
Gross Unrealized Gains	3,026	[1]	11,570	[1]
Gross Unrealized Losses	7,566	[1]	10	[1]
Fair/Book Value, Total	324,929	[1]	352,772	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value	195,736		4,542
12 Months or More Fair Value	0		0
Total Fair Value	195,736		4,542
Less Than 12 Months Unrealized Loss	7,566		10
12 Months or More Unrealized Loss	0		0
Total Unrealized Loss	7,566		10
Mortgage Backed Securities [Member] | Held-to-maturity Securities [Member]
Held To Maturity Securities [Abstract]
Book Value	45	[1]	484	[1]
Gross Unrealized Gains	0	[1]	12	[1]
Gross Unrealized Losses	0	[1]	0	[1]
Fair Value	45	[1]	496	[1]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Total Unrealized Loss	0	[1]	0	[1]
Corporate Securities [Member] | Available-for-sale Securities [Member]
Available-for-sale securities [Abstract]
Amortized Cost	49,247		22,318	[1]
Gross Unrealized Gains	280		252	[1]
Gross Unrealized Losses	147		12	[1]
Fair/Book Value, Total	49,380		22,558	[1]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less Than 12 Months Fair Value	15,297		3,442
12 Months or More Fair Value	2,457		0
Total Fair Value	17,754		3,442
Less Than 12 Months Unrealized Loss	106		12
12 Months or More Unrealized Loss	41		0
Total Unrealized Loss	147		12
Other [Member] | Available-for-sale Securities [Member]
Available-for-sale securities [Abstract]
Amortized Cost	1,894		10,173
Gross Unrealized Gains	0		0
Gross Unrealized Losses	0		0
Fair/Book Value, Total	1,894		10,173
Other [Member] | Held-to-maturity Securities [Member]
Held To Maturity Securities [Abstract]
Book Value	2,775		2,214
Gross Unrealized Gains	0		0
Gross Unrealized Losses	0		0
Fair Value	2,775		2,214
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Total Unrealized Loss	$ 0		$ 0

[1] All Mortgage Backed Securities were issued by an agency or government sponsored entity of the U.S. government.