Investment Securities (Schedule of Unrealized Losses Not Recognized in Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	$ 57,445	$ 91,251
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(1,224)	(2,600)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	4,968	4,512
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(479)	(437)
Investment Securities Available-for-Sale: Total, fair value	62,413	95,763
Investment Securities Available-for-Sale: Total, unrealized losses	(1,703)	(3,037)
Investment Securities Held-to-Maturity: Less than 12 months, fair value	87,941	128,093
Investment Securities Held-to-Maturity: Less than 12 months, unrealized losses	(1,478)	(5,112)
Investment Securities Held-to-Maturity: 12 months or longer, fair value	17,543	9,257
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	(725)	(732)
Investment Securities Held-to-Maturity: Total, fair value	105,484	137,350
Investment Securities Held-to-Maturity: Total, unrealized losses	(2,203)	(5,844)
Temporarily Impaired Securities, Total Fair Value	167,897	233,113
Temporarily Impaired Securities, Total Unrealized Losses	(3,906)	(8,881)
Temporarily Impaired Securities, Less than 12 Months, Fair Value	145,386	219,344
Temporarily Impaired Securities, Less than 12 Months, unrealized losses	(2,702)	(7,712)
Temporarily Impaired Securities, 12 months or longer, Fair Value	22,511	13,769
Temporarily Impaired Securities, 12 months or longer, unrealized losses	(1,204)	(1,169)
U.S. treasury notes [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	13,896	13,519
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(465)	(825)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	0	0
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	0	0
Investment Securities Available-for-Sale: Total, fair value	13,896	13,519
Investment Securities Available-for-Sale: Total, unrealized losses	(465)	(825)
Investment Securities Held-to-Maturity: Less than 12 months, fair value	27,793	27,037
Investment Securities Held-to-Maturity: Less than 12 months, unrealized losses	(315)	(1,019)
Investment Securities Held-to-Maturity: 12 months or longer, fair value	0	0
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	0	0
Investment Securities Held-to-Maturity: Total, fair value	27,793	27,037
Investment Securities Held-to-Maturity: Total, unrealized losses	(315)	(1,019)
Federal agency obligations [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	19,032	17,200
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(275)	(655)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	476	0
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(39)	0
Investment Securities Available-for-Sale: Total, fair value	19,508	17,200
Investment Securities Available-for-Sale: Total, unrealized losses	(314)	(655)
Investment Securities Held-to-Maturity: Less than 12 months, fair value	5,751	13,197
Investment Securities Held-to-Maturity: Less than 12 months, unrealized losses	(71)	(388)
Investment Securities Held-to-Maturity: 12 months or longer, fair value	0	295
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	0	(1)
Investment Securities Held-to-Maturity: Total, fair value	5,751	13,492
Investment Securities Held-to-Maturity: Total, unrealized losses	(71)	(389)
Commercial mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	2,963	2,924
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(116)	(157)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	0	0
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	0	0
Investment Securities Available-for-Sale: Total, fair value	2,963	2,924
Investment Securities Available-for-Sale: Total, unrealized losses	(116)	(157)
Investment Securities Held-to-Maturity: Less than 12 months, fair value	1,402	1,395
Investment Securities Held-to-Maturity: Less than 12 months, unrealized losses	(39)	(62)
Investment Securities Held-to-Maturity: 12 months or longer, fair value	0	0
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	0	0
Investment Securities Held-to-Maturity: Total, fair value	1,402	1,395
Investment Securities Held-to-Maturity: Total, unrealized losses	(39)	(62)
Residential mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	5,344	18,293
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(102)	(229)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	0	0
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	0	0
Investment Securities Available-for-Sale: Total, fair value	5,344	18,293
Investment Securities Available-for-Sale: Total, unrealized losses	(102)	(229)
Investment Securities Held-to-Maturity: Less than 12 months, fair value	2,125	2,182
Investment Securities Held-to-Maturity: Less than 12 months, unrealized losses	(35)	(64)
Investment Securities Held-to-Maturity: 12 months or longer, fair value	0	0
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	0	0
Investment Securities Held-to-Maturity: Total, fair value	2,125	2,182
Investment Securities Held-to-Maturity: Total, unrealized losses	(35)	(64)
Obligations of U.S. states and political subdivisions [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value		4,199
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses		(55)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value		0
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses		0
Investment Securities Available-for-Sale: Total, fair value		4,199
Investment Securities Available-for-Sale: Total, unrealized losses		(55)
Investment Securities Held-to-Maturity: Less than 12 months, fair value	39,474	57,072
Investment Securities Held-to-Maturity: Less than 12 months, unrealized losses	(960)	(2,957)
Investment Securities Held-to-Maturity: 12 months or longer, fair value	17,543	8,962
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	(725)	(731)
Investment Securities Held-to-Maturity: Total, fair value	57,017	66,034
Investment Securities Held-to-Maturity: Total, unrealized losses	(1,685)	(3,688)
Trust preferred securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	0	4,031
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	0	(211)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	1,278	1,275
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(296)	(299)
Investment Securities Available-for-Sale: Total, fair value	1,278	5,306
Investment Securities Available-for-Sale: Total, unrealized losses	(296)	(510)
Corporate bonds and notes [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	11,440	30,533
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(112)	(448)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	1,947	1,965
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(36)	(34)
Investment Securities Available-for-Sale: Total, fair value	13,387	32,498
Investment Securities Available-for-Sale: Total, unrealized losses	(148)	(482)
Investment Securities Held-to-Maturity: Less than 12 months, fair value	11,396	27,210
Investment Securities Held-to-Maturity: Less than 12 months, unrealized losses	(58)	(622)
Investment Securities Held-to-Maturity: 12 months or longer, fair value	0	0
Investment Securities Held-to-Maturity: 12 months or longer, unrealized losses	0	0
Investment Securities Held-to-Maturity: Total, fair value	11,396	27,210
Investment Securities Held-to-Maturity: Total, unrealized losses	(58)	(622)
Certificates of Deposit [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	415	552
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(9)	(20)
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	0	0
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	0	0
Investment Securities Available-for-Sale: Total, fair value	415	552
Investment Securities Available-for-Sale: Total, unrealized losses	(9)	(20)
Equity securities [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	0	0
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	0	0
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	292	287
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(84)	(89)
Investment Securities Available-for-Sale: Total, fair value	292	287
Investment Securities Available-for-Sale: Total, unrealized losses	(84)	(89)
Mutual funds and money market funds [Member]
Schedule of Investments [Line Items]
Investment Securities Available-for-Sale: Less than 12 months, fair value	4,355	0
Investment Securities Available-for-Sale: Less than 12 months, unrealized losses	(145)	0
Investment Securities Available-for-Sale: 12 Months or Longer, fair value	975	985
Investment Securities Available-for-Sale: 12 months or longer, unrealized losses	(24)	(15)
Investment Securities Available-for-Sale: Total, fair value	5,330	985
Investment Securities Available-for-Sale: Total, unrealized losses	$ (169)	$ (15)