Allowance for Loan Losses (Troubled Debt Restructurings on Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	2,494	2,624
Financing Receivable, Modifications, Recorded Investment	$ 130,458	$ 133,187
Financing Receiables, Modifications, Unpaid Principal Balance	173,976	184,293
Commercial and Industrial Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	51	40
Financing Receivable, Modifications, Recorded Investment	7,318	5,559
Financing Receiables, Modifications, Unpaid Principal Balance	15,495	9,996
Commercial Real Estate
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	94	77
Financing Receivable, Modifications, Recorded Investment	45,648	57,657
Financing Receiables, Modifications, Unpaid Principal Balance	67,466	79,307
Commercial Real Estate Construction Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	40	40
Financing Receivable, Modifications, Recorded Investment	339	5,049
Financing Receiables, Modifications, Unpaid Principal Balance	9,552	25,726
Commercial Loan
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	185	157
Financing Receivable, Modifications, Recorded Investment	53,305	68,265
Financing Receiables, Modifications, Unpaid Principal Balance	92,513	115,029
Consumer Installment Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	1,245	1,565
Financing Receivable, Modifications, Recorded Investment	25,880	27,790
Financing Receiables, Modifications, Unpaid Principal Balance	26,662	29,078
Home Equity Line of Credit
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	483	286
Financing Receivable, Modifications, Recorded Investment	23,201	12,371
Financing Receiables, Modifications, Unpaid Principal Balance	23,513	12,745
Consumer Credit Card Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	238	307
Financing Receivable, Modifications, Recorded Investment	854	1,113
Financing Receiables, Modifications, Unpaid Principal Balance	854	1,113
Residential Mortgage
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	343	309
Financing Receivable, Modifications, Recorded Investment	27,218	23,648
Financing Receiables, Modifications, Unpaid Principal Balance	30,434	26,328
Consumer Loan
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	2,309	2,467
Financing Receivable, Modifications, Recorded Investment	77,153	64,922
Financing Receiables, Modifications, Unpaid Principal Balance	81,463	69,264
Originated Loans Commercial | Commercial and Industrial Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	41	35
Financing Receivable, Modifications, Recorded Investment	7,123	4,449
Financing Receiables, Modifications, Unpaid Principal Balance	13,887	7,660
Originated Loans Commercial | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	67	52
Financing Receivable, Modifications, Recorded Investment	17,607	15,932
Financing Receiables, Modifications, Unpaid Principal Balance	22,645	20,569
Originated Loans Commercial | Commercial Real Estate Construction Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	31	30
Financing Receivable, Modifications, Recorded Investment	0	905
Financing Receiables, Modifications, Unpaid Principal Balance	0	1,179
Originated Loans Commercial | Commercial Loan
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	139	117
Financing Receivable, Modifications, Recorded Investment	24,730	21,286
Financing Receiables, Modifications, Unpaid Principal Balance	36,532	29,408
Originated Consumer Loans | Consumer Installment Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	1,205	1,553
Financing Receivable, Modifications, Recorded Investment	24,905	27,285
Financing Receiables, Modifications, Unpaid Principal Balance	25,608	28,536
Originated Consumer Loans | Home Equity Line of Credit
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	270	231
Financing Receivable, Modifications, Recorded Investment	7,379	6,725
Financing Receiables, Modifications, Unpaid Principal Balance	7,629	7,054
Originated Consumer Loans | Consumer Credit Card Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	238	307
Financing Receivable, Modifications, Recorded Investment	854	1,113
Financing Receiables, Modifications, Unpaid Principal Balance	854	1,113
Originated Consumer Loans | Residential Mortgage
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	315	301
Financing Receivable, Modifications, Recorded Investment	25,251	23,067
Financing Receiables, Modifications, Unpaid Principal Balance	28,277	25,676
Originated Consumer Loans | Consumer Loan
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	2,028	2,392
Financing Receivable, Modifications, Recorded Investment	58,389	58,190
Financing Receiables, Modifications, Unpaid Principal Balance	62,368	62,379
Originated Loans
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	2,167	2,509
Financing Receivable, Modifications, Recorded Investment	83,119	79,476
Financing Receiables, Modifications, Unpaid Principal Balance	98,900	91,787
Acquired Loans
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	216	29
Financing Receivable, Modifications, Recorded Investment	12,100	2,917
Financing Receiables, Modifications, Unpaid Principal Balance	12,474	3,049
Acquired Loans | Commercial and Industrial Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	2	1
Financing Receivable, Modifications, Recorded Investment	18	6
Financing Receiables, Modifications, Unpaid Principal Balance	19	5
Acquired Loans | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	3	1
Financing Receivable, Modifications, Recorded Investment	2,542	1,730
Financing Receiables, Modifications, Unpaid Principal Balance	2,595	1,730
Acquired Loans | Commercial
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end		2
Financing Receivable, Modifications, Recorded Investment		1,736
Financing Receiables, Modifications, Unpaid Principal Balance		1,735
Acquired Loans | Commercial Loan
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	5
Financing Receivable, Modifications, Recorded Investment	2,560	1,736
Financing Receiables, Modifications, Unpaid Principal Balance	2,614
Acquired Loans | installment
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	40	12
Financing Receivable, Modifications, Recorded Investment	975	505
Financing Receiables, Modifications, Unpaid Principal Balance	1,054	542
Acquired Loans | Home Equity Line of Credit
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	145	8
Financing Receivable, Modifications, Recorded Investment	6,932	245
Financing Receiables, Modifications, Unpaid Principal Balance	6,983	270
Acquired Loans | Residential Mortgage
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	26	7
Financing Receivable, Modifications, Recorded Investment	1,633	431
Financing Receiables, Modifications, Unpaid Principal Balance	1,823	502
Acquired Loans | Consumer Loan
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	211	27
Financing Receivable, Modifications, Recorded Investment	9,540	1,181
Financing Receiables, Modifications, Unpaid Principal Balance	9,860	1,314
Covered Loans Commercial | Commercial and Industrial Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	8	4
Financing Receivable, Modifications, Recorded Investment	177	1,104
Financing Receiables, Modifications, Unpaid Principal Balance	1,589	2,331
Covered Loans Commercial | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	24	24
Financing Receivable, Modifications, Recorded Investment	25,499	39,995
Financing Receiables, Modifications, Unpaid Principal Balance	42,226	57,008
Covered Loans Commercial | Commercial Real Estate Construction Financing Receivable
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	9	10
Financing Receivable, Modifications, Recorded Investment	339	4,144
Financing Receiables, Modifications, Unpaid Principal Balance	9,552	24,547
Covered Loans Commercial | Commercial Loan
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	41	38
Financing Receivable, Modifications, Recorded Investment	26,015	45,243
Financing Receiables, Modifications, Unpaid Principal Balance	53,367	83,886
Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Recorded Investment	9,224	5,551
Covered Consumer Loans | Home Equity Line of Credit
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	68	47
Financing Receivable, Modifications, Recorded Investment	8,890	5,401
Financing Receiables, Modifications, Unpaid Principal Balance	8,901	5,421
Covered Consumer Loans | Residential Mortgage
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	2
Financing Receivable, Modifications, Recorded Investment	334	150
Financing Receiables, Modifications, Unpaid Principal Balance	334
Covered TDR Loans
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	111	86
Financing Receivable, Modifications, Recorded Investment	35,239	50,794
Financing Receiables, Modifications, Unpaid Principal Balance	62,602	89,457
Covered TDR Loans | Residential Mortgage
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end		1
Financing Receivable, Modifications, Recorded Investment		150
Financing Receiables, Modifications, Unpaid Principal Balance		150
Covered TDR Loans | Consumer Loan
Financing Receivable, Modifications [Line Items]
financing receivables, modifications, number of contracts at period end	70	48
Financing Receivable, Modifications, Recorded Investment	9,224	5,551
Financing Receiables, Modifications, Unpaid Principal Balance	$ 9,235	$ 5,571