Credit Quality Assessment (Activity in Allowance for Loan and Lease Losses by Respective Loan Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	$ 38,766	$ 42,957	$ 42,957
Provision (credit)	(1,016)		(1,084)
Charge-offs	(1,541)		(11,165)
Recoveries	1,365	7,774	8,058
Net recoveries (charge-offs)	(176)	(1,865)	(3,107)
Balance at period end	37,574	39,422	38,766
Total loans and leases	2,975,912		2,784,266
Allowance for loans and leases to total loans and leases ratio	1.26%		1.39%
Balance of loans specifically evaluated for impairment	38,584		32,523
Allowance for loans specifically evaluated for impairment	4,344		3,058
Specific allowance to specific loans ratio	11.26%		9.40%
Balance of loans collectively evaluated	2,937,328		2,751,743
Allowance for loans collectively evaluated	33,230		35,708
Collective allowance to collective loans ratio	1.13%		1.30%
Commercial Business [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	6,308	6,495	6,495
Provision (credit)	(1,119)		1,910
Charge-offs	(225)		(2,915)
Recoveries	1,023		818
Net recoveries (charge-offs)	798		(2,097)
Balance at period end	5,987		6,308
Total loans and leases	368,611		356,651
Allowance for loans and leases to total loans and leases ratio	1.62%		1.77%
Balance of loans specifically evaluated for impairment	5,943		5,608
Allowance for loans specifically evaluated for impairment	1,406		849
Specific allowance to specific loans ratio	23.66%		15.14%
Balance of loans collectively evaluated	362,668		351,043
Allowance for loans collectively evaluated	4,581		5,459
Collective allowance to collective loans ratio	1.26%		1.56%
Commercial Acquisition, Development and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	3,754	4,737	4,737
Provision (credit)	799		(3,978)
Charge-offs			(85)
Recoveries			3,080
Net recoveries (charge-offs)			2,995
Balance at period end	4,553		3,754
Total loans and leases	194,666		160,696
Allowance for loans and leases to total loans and leases ratio	2.34%		2.34%
Balance of loans specifically evaluated for impairment	3,792		4,128
Allowance for loans specifically evaluated for impairment	1,188		1,031
Specific allowance to specific loans ratio	31.33%		24.98%
Balance of loans collectively evaluated	190,874		156,568
Allowance for loans collectively evaluated	3,365		2,723
Collective allowance to collective loans ratio	1.76%		1.74%
Commercial Investor Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	9,263	9,583	9,583
Provision (credit)	(681)		1,100
Charge-offs	(4)		(4,774)
Recoveries	34		3,354
Net recoveries (charge-offs)	30		(1,420)
Balance at period end	8,612		9,263
Total loans and leases	575,984		552,178
Allowance for loans and leases to total loans and leases ratio	1.50%		1.68%
Balance of loans specifically evaluated for impairment	10,352		7,654
Allowance for loans specifically evaluated for impairment	399		126
Specific allowance to specific loans ratio	3.85%		1.65%
Balance of loans collectively evaluated	565,632		544,524
Allowance for loans collectively evaluated	8,213		9,137
Collective allowance to collective loans ratio	1.45%		1.68%
Commercial Owner Occupied Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans and leases	584,964		592,823
Leases [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	16	332	332
Provision (credit)	(6)		(326)
Recoveries			10
Net recoveries (charge-offs)			10
Balance at period end	10		16
Total loans and leases	156		703
Allowance for loans and leases to total loans and leases ratio	6.42%		2.28%
Balance of loans collectively evaluated	156		703
Allowance for loans collectively evaluated	10		16
Collective allowance to collective loans ratio	6.42%		2.28%
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	4,142	3,846	3,846
Provision (credit)	41		1,951
Charge-offs	(720)		(1,853)
Recoveries	134		198
Net recoveries (charge-offs)	(586)		(1,655)
Balance at period end	3,597		4,142
Total loans and leases	410,723		373,657
Allowance for loans and leases to total loans and leases ratio	0.88%		1.11%
Balance of loans specifically evaluated for impairment	27		29
Balance of loans collectively evaluated	410,696		373,628
Allowance for loans collectively evaluated	3,597		4,142
Collective allowance to collective loans ratio	0.88%		1.11%
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans and leases	698,925		618,381
Residential Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans and leases	141,883		129,177
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans and leases	1,724,225		1,662,348
Commercial Real Estate Portfolio Segment [Member] | Commercial Acquisition, Development and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans and leases	194,666		160,696
Commercial Real Estate Portfolio Segment [Member] | Commercial Investor Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans and leases	575,984		552,178
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	6,308	6,997	6,997
Provision (credit)	630		(874)
Charge-offs	(265)		(240)
Recoveries			425
Net recoveries (charge-offs)	(265)		185
Balance at period end	6,673		6,308
Total loans and leases	584,964		592,823
Allowance for loans and leases to total loans and leases ratio	1.14%		1.06%
Balance of loans specifically evaluated for impairment	10,742		7,111
Allowance for loans specifically evaluated for impairment	794		426
Specific allowance to specific loans ratio	7.39%		5.99%
Balance of loans collectively evaluated	574,222		585,712
Allowance for loans collectively evaluated	5,879		5,882
Collective allowance to collective loans ratio	1.02%		1.00%
Residential Real Estate Portfolio Segment [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	7,819	8,522	8,522
Provision (credit)	(355)		329
Charge-offs	(324)		(1,194)
Recoveries	105		162
Net recoveries (charge-offs)	(219)		(1,032)
Balance at period end	7,245		7,819
Total loans and leases	698,925		618,381
Allowance for loans and leases to total loans and leases ratio	1.04%		1.26%
Balance of loans specifically evaluated for impairment	6,039		6,141
Allowance for loans specifically evaluated for impairment	557		626
Specific allowance to specific loans ratio	9.22%		10.19%
Balance of loans collectively evaluated	692,886		612,240
Allowance for loans collectively evaluated	6,688		7,193
Collective allowance to collective loans ratio	0.97%		1.17%
Residential Real Estate Portfolio Segment [Member] | Residential Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	1,156	2,445	2,445
Provision (credit)	(325)		(1,196)
Charge-offs	(3)		(104)
Recoveries	69		11
Net recoveries (charge-offs)	66		(93)
Balance at period end	897		1,156
Total loans and leases	141,883		129,177
Allowance for loans and leases to total loans and leases ratio	0.63%		0.89%
Balance of loans specifically evaluated for impairment	1,689		1,852
Balance of loans collectively evaluated	140,194		127,325
Allowance for loans collectively evaluated	$ 897		$ 1,156
Collective allowance to collective loans ratio	0.64%		0.91%