Schedule of Loans Renegotiated in Troubled Debt Restructurings (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) notes	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) notes	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Loans Renegotiated in Troubled Debt Restructurings	$ 42,547		$ 42,547		$ 44,227
Loans Renegotiated in Troubled Debt Restructurings, Non-Accrual Loans	25,845		25,845		23,275
Loans Renegotiated in Troubled Debt Restructurings, Accrual Loans	$ 16,702		$ 16,702		$ 20,952
Number of Notes | notes	11		12
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 12,264		$ 12,274
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | notes	3		4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 264		$ 2,009
Loans and Leases Receivable, Impaired, Commitment to Lend	0		0
Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		0
Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	8,744		8,754
Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	2,959		2,959
Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 561		$ 561
Commercial real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | notes	0		1
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 1,745
Residential construction real estate
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes | notes	1		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 67		$ 67
Residential construction real estate | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		0
Residential construction real estate | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		0
Residential construction real estate | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		0
Residential construction real estate | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 67		$ 67
Indirect consumer
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes | notes	2		2
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 31		$ 31
Indirect consumer | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		0
Indirect consumer | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		0
Indirect consumer | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		0
Indirect consumer | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 31		$ 31
Commercial
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Number of Notes | notes	8		9
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 12,166		$ 12,176
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | notes	3		3
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 264		$ 264
Commercial | Interest only period
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	0		0
Commercial | Extension of terms or maturity
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	8,744		8,754
Commercial | Interest rate adjustment
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	2,959		2,959
Commercial | Other
Loans and Leases Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 463		$ 463