Loans and Leases - Concessions Granted on Accruing and Nonaccrual Loans Restructured (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) loan	Jun. 30, 2014 USD ($) loan	Jun. 30, 2015 USD ($) loan	Jun. 30, 2014 USD ($) loan
Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	3	0	5	0
Amount | $	$ 1,352	$ 0	$ 1,848	$ 0
Accrual Troubled Debt Restructuring Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0	2	0
Amount | $	$ 0	$ 0	$ 496	$ 0
Accrual Troubled Debt Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0	0	0
Amount | $	$ 0	$ 0	$ 0	$ 0
Accrual Troubled Debt Restructuring Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	0	1	0
Amount | $	$ 500	$ 0	$ 500	$ 0
Accrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	2	0	2	0
Amount | $	$ 852	$ 0	$ 852	$ 0
Nonaccrual Troubled Debt Restructured Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0	1	3
Amount | $	$ 0	$ 0	$ 122	$ 738
Nonaccrual Troubled Debt Restructured Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0	1	0
Amount | $	$ 0	$ 0	$ 122	$ 0
Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0	0	2
Amount | $	$ 0	$ 0	$ 0	$ 105
Nonaccrual Troubled Debt Restructured Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0	0	1
Amount | $	$ 0	$ 0	$ 0	$ 633
Nonaccrual Troubled Debt Restructured Loans [Member] | Amortization Period Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0	0	0
Amount | $	$ 0	$ 0	$ 0	$ 0
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	2	0	3	0
Amount | $	$ 947		$ 1,090
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0		1
Amount | $	$ 0		$ 143
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0		0
Amount | $	$ 0		$ 0
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1		1
Amount | $	$ 500		$ 500
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1		1
Amount | $	$ 447		$ 447
Commercial, Financial and Agricultural [Member] | Nonaccrual Troubled Debt Restructured Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			1	0
Amount | $			$ 122
Commercial, Financial and Agricultural [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			1
Amount | $			$ 122
Commercial, Financial and Agricultural [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			0
Amount | $			$ 0
Commercial, Financial and Agricultural [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			0
Amount | $			$ 0
Commercial, Financial and Agricultural [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Amortization Period Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			0
Amount | $			$ 0
Real Estate-Residential Secured for Business Purpose [Member] | Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			1	0
Amount | $			$ 353
Real Estate-Residential Secured for Business Purpose [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			1
Amount | $			$ 353
Real Estate-Residential Secured for Business Purpose [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			0
Amount | $			$ 0
Real Estate-Residential Secured for Business Purpose [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			0
Amount | $			$ 0
Real Estate-Residential Secured for Business Purpose [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			0
Amount | $			$ 0
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			0	2
Amount | $				$ 688
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans				1
Amount | $				$ 55
Real Estate-Residential Secured for Business Purpose [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans				1
Amount | $				$ 633
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	0	1	0
Amount | $	$ 405		$ 405
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0		0
Amount | $	$ 0		$ 0
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0		0
Amount | $	$ 0		$ 0
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0		0
Amount | $	$ 0		$ 0
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1		1
Amount | $	$ 405		$ 405
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans			0	1
Amount | $				$ 50
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Temporary Payment Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans				0
Amount | $				$ 0
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructured Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans				1
Amount | $				$ 50