Securities (Reconciliation of fair value of securities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	$ 336,404	$ 360,317
Available for Sale Securities Gross Gain unrealized	9,100	7,675
Available for sale Securities, Unrealized Losses Other	(4,124)	(8,801)
Available for sale Securities, Other Than Temporary Impairment	(1,299)	(2,329)
Available for sale Securities, Fair Value, Total	340,081	356,862
Held to maturity Securities, Amortized Cost	373,888	350,652
Held to Maturity Securities Holding Gain Unrecognized	7,402	3,012
Held to Maturity Securities Holding Loss Unrecognized	(4,346)	(7,209)
Held to maturity Securities, Other Than Temporary Impairment
Held to Maturity, Fair Value, Total	376,944	346,455
Amortized Cost	710,292	710,969
Gross Unrealized Gains	16,502	10,687
Unrealized Losses Other	(8,470)	(16,010)
Other Than Temporary Impairment	(1,299)	(2,329)
Fair Value	717,025	703,317
U. S. Government Agency Securities [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	41,346	41,331
Available for Sale Securities Gross Gain unrealized	120	3
Available for sale Securities, Unrealized Losses Other	(29)	(885)
Available for sale Securities, Other Than Temporary Impairment
Available for sale Securities, Fair Value, Total	41,437	40,449
U.S. Treasury Securities [Member]
Reconciliation of fair value of securities
Held to maturity Securities, Amortized Cost	1,011	1,011
Held to Maturity Securities Holding Gain Unrecognized	57	31
Held to Maturity Securities Holding Loss Unrecognized	0
Held to maturity Securities, Other Than Temporary Impairment
Held to Maturity, Fair Value, Total	1,068	1,042
Agency Mortgage-Backed Securities [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	213,894	232,742
Available for Sale Securities Gross Gain unrealized	7,530	6,405
Available for sale Securities, Unrealized Losses Other	(1,369)	(4,556)
Available for sale Securities, Other Than Temporary Impairment
Available for sale Securities, Fair Value, Total	220,055	234,591
Held to maturity Securities, Amortized Cost	170,217	155,067
Held to Maturity Securities Holding Gain Unrecognized	4,704	1,917
Held to Maturity Securities Holding Loss Unrecognized	0	(1,033)
Held to maturity Securities, Other Than Temporary Impairment
Held to Maturity, Fair Value, Total	174,921	155,951
Agency Collateralized Mortgage Obligations [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	53,941	58,765
Available for Sale Securities Gross Gain unrealized	296	490
Available for sale Securities, Unrealized Losses Other	(965)	(1,102)
Available for sale Securities, Other Than Temporary Impairment
Available for sale Securities, Fair Value, Total	53,272	58,153
Held to maturity Securities, Amortized Cost	195,478	187,388
Held to Maturity Securities Holding Gain Unrecognized	2,404	824
Held to Maturity Securities Holding Loss Unrecognized	(4,346)	(6,176)
Held to maturity Securities, Other Than Temporary Impairment
Held to Maturity, Fair Value, Total	193,536	182,036
State, County, and Municipal Securities [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	5,145	5,439
Available for Sale Securities Gross Gain unrealized	113	1
Available for sale Securities, Unrealized Losses Other		(28)
Available for sale Securities, Other Than Temporary Impairment
Available for sale Securities, Fair Value, Total	5,258	5,412
Held to maturity Securities, Amortized Cost	678	678
Held to Maturity Securities Holding Gain Unrecognized	6	7
Held to Maturity Securities Holding Loss Unrecognized	0
Held to maturity Securities, Other Than Temporary Impairment
Held to Maturity, Fair Value, Total	684	685
Single Issuer Trust Preferred Securities Issued by Banks and Insurers [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	2,937	2,960
Available for Sale Securities Gross Gain unrealized	52	14
Available for sale Securities, Unrealized Losses Other		(22)
Available for sale Securities, Other Than Temporary Impairment
Available for sale Securities, Fair Value, Total	2,989	2,952
Held to maturity Securities, Amortized Cost	1,500	1,503
Held to Maturity Securities Holding Gain Unrecognized	27	23
Held to Maturity Securities Holding Loss Unrecognized	0
Held to maturity Securities, Other Than Temporary Impairment
Held to Maturity, Fair Value, Total	1,527	1,526
Pooled Trust Preferred Securities Issued by Banks and Insurers [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	7,984	8,083
Available for Sale Securities Gross Gain unrealized
Available for sale Securities, Unrealized Losses Other	(1,594)	(1,913)
Available for sale Securities, Other Than Temporary Impairment	(1,299)	(2,329)
Available for sale Securities, Fair Value, Total	5,091	3,841
Marketable Equity Securities [Member]
Reconciliation of fair value of securities
Available for sale Securities, Amortized Cost	11,157	10,997
Available for Sale Securities Gross Gain unrealized	989	762
Available for sale Securities, Unrealized Losses Other	(167)	(295)
Available for sale Securities, Other Than Temporary Impairment
Available for sale Securities, Fair Value, Total	11,979	11,464
Corporate Debt Securities [Member]
Reconciliation of fair value of securities
Held to maturity Securities, Amortized Cost	5,004	5,005
Held to Maturity Securities Holding Gain Unrecognized	204	210
Held to Maturity Securities Holding Loss Unrecognized	0
Held to maturity Securities, Other Than Temporary Impairment
Held to Maturity, Fair Value, Total	$ 5,208	$ 5,215