Fair Value Of Financial Instruments (Fair Value Of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 53,032	$ 37,812	$ 97,383	$ 74,026
Securities available for sale	526,257	511,751
Securities held to maturity	443	558
FHLB stock	8,145	8,630
FHLB stock		8,630
Loans, net of allowance for loan losses	1,061,435	1,017,007
Total assets	1,685,836	1,611,869
Deposits	1,252,963	1,177,880
Short-term debt	55,600	0
Securities sold under agreement to repurchase	227,996	262,527
Other long-term debt	2,503	22,562
Junior subordinated debentures issued to unconsolidated subsidiary trust	20,619	20,619
Total liabilities	1,567,807	1,502,332
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	53,032	37,812
Securities available for sale	526,257	511,751
Securities held to maturity	443	558
FHLB stock	8,145	8,630
Loans, net of allowance for loan losses	1,061,435	1,017,007
Interest rate contract-cash flow hedge	599	207
Accrued interest receivable	4,577	5,121
Total assets	1,654,488	1,581,086
Deposits	1,252,963	1,177,880
Short-term debt	55,600	0
Securities sold under agreement to repurchase	227,996	262,527
Other long-term debt	2,503	22,562
Junior subordinated debentures issued to unconsolidated subsidiary trust	20,619	20,619
Interest rate contract-cash flow hedge	1,825	1,613
Accrued interest payable	249	282
Total liabilities	1,561,755	1,485,483
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	53,032	37,812
Securities available for sale	526,257	511,751
Securities held to maturity	498	624
FHLB stock	8,145	8,630
Loans, net of allowance for loan losses	1,086,800	1,035,131
Interest rate contract-cash flow hedge	599	207
Accrued interest receivable	4,577	5,121
Total assets	1,679,908	1,599,276
Deposits	1,255,808	1,181,066
Short-term debt	55,600	0
Securities sold under agreement to repurchase	227,996	263,062
Other long-term debt	2,532	23,594
Junior subordinated debentures issued to unconsolidated subsidiary trust	15,741	15,268
Interest rate contract-cash flow hedge	1,825	1,613
Accrued interest payable	249	282
Total liabilities	1,559,751	1,484,885
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	53,032	37,812
Securities available for sale	0	0
Securities held to maturity	0	0
FHLB stock	0	0
Loans, net of allowance for loan losses	0	0
Interest rate contract-cash flow hedge	0	0
Accrued interest receivable	0	0
Total assets	53,032	37,812
Deposits	915,146	829,632
Short-term debt	0	0
Securities sold under agreement to repurchase	0	0
Other long-term debt	0	0
Junior subordinated debentures issued to unconsolidated subsidiary trust	0	0
Interest rate contract-cash flow hedge	0	0
Accrued interest payable	0	0
Total liabilities	915,146	829,632
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	526,257	511,751
Securities held to maturity	498	624
FHLB stock	8,145	8,630
Loans, net of allowance for loan losses	0	0
Interest rate contract-cash flow hedge	599	207
Accrued interest receivable	4,577	5,121
Total assets	540,076	526,333
Deposits	340,662	351,434
Short-term debt	55,600	0
Securities sold under agreement to repurchase	227,996	263,062
Other long-term debt	2,532	23,594
Junior subordinated debentures issued to unconsolidated subsidiary trust	15,741	15,268
Interest rate contract-cash flow hedge	1,825	1,613
Accrued interest payable	249	282
Total liabilities	644,605	655,253
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
Securities available for sale	0	0
Securities held to maturity	0	0
FHLB stock	0	0
Loans, net of allowance for loan losses	1,086,800	1,035,131
Interest rate contract-cash flow hedge	0	0
Accrued interest receivable	0	0
Total assets	1,086,800	1,035,131
Deposits	0	0
Short-term debt	0	0
Securities sold under agreement to repurchase	0	0
Other long-term debt	0	0
Junior subordinated debentures issued to unconsolidated subsidiary trust	0	0
Interest rate contract-cash flow hedge	0	0
Accrued interest payable	0	0
Total liabilities	$ 0	$ 0