Loans and Leases - Troubled Debt Restructuring (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014 loan	Dec. 31, 2013 loan
Financing Receivable, Modifications [Line Items]
Number of loans	11,000	12
Total TDRs	$ 9,649	$ 12,084
Financing Receivable New Modifications for the Period [Abstract]
Number of loans	2,000
Term	45
Combination of types	28
Total	73
Pre-Modification Outstanding Recorded Investment	73
Post-Modification Outstanding Recorded Investment	73
Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	7,664	9,524
Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Number of TDRs already classified as impaired	3
Total TDRs	1,985	2,560
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	2,000	3
Total TDRs	2,913	3,847
Commercial real estate [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	2,913	3,847
Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	3,000	4
Total TDRs	1,197	1,736
Construction and land development [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	941	1,257
Construction and land development [Member] | Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	256	479
Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	5,000	3
Total TDRs	5,430	6,380
Financing Receivable New Modifications for the Period [Abstract]
Number of loans	2,000
Term	45
Combination of types	28
Total	73
Pre-Modification Outstanding Recorded Investment	73
Post-Modification Outstanding Recorded Investment	73
Commercial and industrial [Member] | Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	3,810	4,420
Commercial and industrial [Member] | Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	1,620	1,960
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans	1,000	2
Total TDRs	109	121
Residential real estate [Member] | Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 109	$ 121