Loans and Leases - Concessions Granted on Accruing and Nonaccrual Loans Restructured (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) loan	Sep. 30, 2014 USD ($) loan	Sep. 30, 2015 USD ($) loan	Sep. 30, 2014 USD ($) loan
Accrual Troubled Debt Restructuring Loans [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	4	6	4
Amount | $	$ 50	$ 2,424	$ 1,898	$ 2,424
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	0	3	1	3
Amount | $	$ 0	$ 2,299	$ 500	$ 2,299
Accrual Troubled Debt Restructuring Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	1	0	1
Amount | $	$ 0	$ 125	$ 0	$ 125
Accrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	1	0	3	0
Amount | $	$ 50	$ 0	$ 902	$ 0
Nonaccrual Troubled Debt Restructuring 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 Restructuring 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 Restructuring 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 Restructuring 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 Restructuring Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	0	0	0
Amount | $	$ 0	$ 0	$ 0	$ 0
Nonaccrual Troubled Debt Restructuring 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	1	3	4	3
Amount | $	$ 50	$ 1,424	$ 1,140	$ 1,424
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	0	1	0
Amount | $	$ 0	$ 0	$ 143	$ 0
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	0	0
Amount | $	$ 0	$ 0	$ 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	0	2	1	2
Amount | $	$ 0	$ 1,299	$ 500	$ 1,299
Commercial, Financial and Agricultural [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans	0	1	0	1
Amount | $	$ 0	$ 125	$ 0	$ 125
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		2	0
Amount | $	$ 50		$ 497	$ 0
Commercial, Financial and Agricultural [Member] | Nonaccrual Troubled Debt Restructuring 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 Restructuring 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 Restructuring 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 Restructuring 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 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] | 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 Restructuring 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 Restructuring 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 Restructuring 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	0	1	1	1
Amount | $		$ 1,000	$ 405	$ 1,000
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	0
Amount | $		$ 0	$ 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	0
Amount | $		$ 0	$ 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		1	0	1
Amount | $		$ 1,000	$ 0	$ 1,000
Real Estate-Commercial [Member] | Accrual Troubled Debt Restructuring Loans [Member] | Payments Suspended [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans		0	0	0
Amount | $		$ 0	$ 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
Amount | $			$ 405
Real Estate-Commercial [Member] | Nonaccrual Troubled Debt Restructuring 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 Restructuring 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 Restructuring Loans [Member] | Interest Rate Reduction [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of Loans				1
Amount | $				$ 50