Covered Assets and FDIC Loss-sharing Asset (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Amount of Estimated Clawback Liability	$ 4,200,000		$ 4,200,000
Payment Of Clawback If Losses Less Than Stated Levels, Period After Acquisition			10 years 45 days
Provision for loan and lease losses			5,019,000	3,581,000
Federal deposit insurance corporation loss-sharing indemnified assets	19,800,000		19,800,000
Federal deposit insurance corporation loss-sharing indemnified assets receivable	3,700,000		3,700,000
FDIC Loss-sharing Asset, Period Increase (Decrease)	416,000
Covered Loans [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Percentage of loss shared by FDIC	80.00%		80.00%
FDIC Percentage Of Loss Recoveries	80.00%		80.00%
Percentage of loss shared by FDIC When Loss Share Thresholds Met	95.00%		95.00%
Percentage Of Loss Recoveries Shared By FDIC When Loss Share Thresholds Met	95.00%		95.00%
Provision for loan and lease losses	(520,000)	(947,000)	3,419,000	(1,679,000)
Impairment expenses			320,000
Negative provision to adjust allowance for loss			$ 200,000
Covered Loans [Member] | Maximum [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Loss Sharing Agreement Effective Years			10 years
Loss Recovery Provision Effective Years			10 years
Covered Loans [Member] | Minimum [Member]
Covered Assets And FDIC Loss Sharing Asset [Line Items]
Loss Sharing Agreement Effective Years			5 years
Loss Recovery Provision Effective Years			8 years