Loans and Leases - Composition of Non-accrual Loans (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
LHFI, Nonaccrual, Loan balance	$ 9,766		$ 10,157
LHFI, Nonaccrual, Specific reserves	493		886
LHFS, Nonaccrual, Loan balance	1,018
Total, Nonaccrual, Loan balance	10,784		10,157
Total, Nonaccrual. Specific reserve	493		886
Financing Receivable, Recorded Investment, Past Due [Abstract]
Transfers to OREO	1,998	6,428	9,051
Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
LHFI, Nonaccrual, Loan balance	3,732		2,325
LHFI, Nonaccrual, Specific reserves	205		331
Construction and land development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
LHFI, Nonaccrual, Loan balance	815		2,650
LHFI, Nonaccrual, Specific reserves	172
LHFS, Nonaccrual, Loan balance	1,018
Commercial and industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
LHFI, Nonaccrual, Loan balance	2,583		3,629
LHFI, Nonaccrual, Specific reserves	5		452
Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
LHFI, Nonaccrual, Loan balance	983		632
LHFI, Nonaccrual, Specific reserves	30		19
Leases [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
LHFI, Nonaccrual, Loan balance	525		467
LHFI, Nonaccrual, Specific reserves	62		60
Tax certificates [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
LHFI, Nonaccrual, Loan balance	1,128		454
LHFI, Nonaccrual, Specific reserves	$ 19		$ 24