Allowance for Loan and Lease Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance			$ 24,643
Provision	2,489	1,011	3,527	2,136
Ending Balance	25,458		25,458
Orginated Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	24,598	26,948	24,643	27,593
Charge-offs	(531)	(1,295)	(1,723)	(3,184)
Recoveries	1,780	201	2,107	320
Provision	(994)	1,011	(174)	2,136
Ending Balance	24,853	26,865	24,853	26,865
Orginated Loans and Leases | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	7,037	8,270	7,533	8,936
Charge-offs	(42)	(329)	(432)	(581)
Recoveries	1,282	46	1,442	65
Provision	(1,322)	(180)	(1,588)	(613)
Ending Balance	6,955	7,807	6,955	7,807
Orginated Loans and Leases | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	10,644	12,314	10,184	12,662
Charge-offs	(144)	(200)	(490)	(1,169)
Recoveries	358	0	436	0
Provision	(449)	853	279	1,474
Ending Balance	10,409	12,967	10,409	12,967
Orginated Loans and Leases | Residential real estate loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,036	4,491	4,981	4,247
Charge-offs	(147)	(614)	(339)	(1,023)
Recoveries	27	66	29	66
Provision	357	407	602	1,060
Ending Balance	5,273	4,350	5,273	4,350
Orginated Loans and Leases | Total Consumer and other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,879	1,868	1,940	1,709
Charge-offs	(198)	(152)	(462)	(411)
Recoveries	113	89	200	189
Provision	401	(85)	517	233
Ending Balance	2,195	1,720	2,195	1,720
Orginated Loans and Leases | Finance Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2	5	5	39
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	19	16	16	(18)
Ending Balance	21	21	21	21
Acquired Loans and Leases
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	63		0
Charge-offs	(2,941)		(3,096)
Recoveries	0		0
Provision	3,483		3,701
Ending Balance	605		605
Acquired Loans and Leases | Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0		0
Charge-offs	(2,906)		(2,929)
Recoveries	0		0
Provision	2,970		2,993
Ending Balance	64		64
Acquired Loans and Leases | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	63		0
Charge-offs	(32)		(32)
Recoveries	0		0
Provision	350		413
Ending Balance	381		381
Acquired Loans and Leases | Residential real estate loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0		0
Charge-offs	(3)		(110)
Recoveries	0		0
Provision	129		236
Ending Balance	126		126
Acquired Loans and Leases | Total Consumer and other
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0		0
Charge-offs	0		(25)
Recoveries	0		0
Provision	34		59
Ending Balance	34		34
Acquired Loans and Leases | Covered Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	0		0
Charge-offs	0		0
Recoveries	0		0
Provision	0		0
Ending Balance	$ 0		$ 0