Loans and Leases - Troubled Debt Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014 loan	Sep. 30, 2014 loan	Sep. 30, 2013 loan	Dec. 31, 2013 loan
Financing Receivable, Modifications [Line Items]
Number of loans	12,000	12,000		12
Total TDRs	$ 9,350	$ 9,350		$ 12,084
Financing Receivable New Modifications for the Period [Abstract]
Number of loans	1	3	3
Term	188	233
Combination of types		28	3,787
Total	188	261	3,787
Pre-Modification Outstanding Recorded Investment	189	262	3,848
Post-Modification Outstanding Recorded Investment	189	262	3,848
Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	6,933	6,933		9,524
Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Number of TDRs already classified as impaired	3	3
Total TDRs	2,417	2,417		2,560
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	2,000	2,000		3
Total TDRs	2,883	2,883		3,847
Financing Receivable New Modifications for the Period [Abstract]
Number of loans			2
Combination of types			3,705
Total			3,705
Pre-Modification Outstanding Recorded Investment			3,761
Post-Modification Outstanding Recorded Investment			3,761
Commercial real estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	2,883	2,883		3,847
Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	3,000	3,000		4
Total TDRs	1,193	1,193		1,736
Construction and land development [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	378	378		1,257
Construction and land development [Member] | Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	815	815		479
Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	6,000	6,000		3
Total TDRs	5,169	5,169		6,380
Financing Receivable New Modifications for the Period [Abstract]
Number of loans	1	3	1
Term	188	233
Combination of types		28	82
Total	188	261	82
Pre-Modification Outstanding Recorded Investment	189	262	87
Post-Modification Outstanding Recorded Investment	189	262	87
Commercial and industrial [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	3,672	3,672		4,420
Commercial and industrial [Member] | Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	1,497	1,497		1,960
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	1,000	1,000		2
Total TDRs	105	105		121
Residential real estate [Member] | Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 105	$ 105		$ 121