Allowance for Loan Losses (Impaired Financing Receivables) (Details) (Originated Loans, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	$ 5,950	$ 6,146	$ 5,004
Impaired Financing Receivable, Recorded Investment	93,448	87,764
Impaired Financing Receivable, Unpaid Principal Balance	110,055	104,244
Impaired Financing Receivable, Related Allowance	5,950	6,146
Impaired Financing Receivable, Average Recorded Investment	95,108	93,702
Commercial and Industrial Financing Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	11,451	2,503
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	18,207	6,679
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	14,193	7,256
Impaired Financing Receivable, with Related Allowance, Recorded Investment	308	5,551
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	344	7,428
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	72	3,235	577
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	326	5,009
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	16,874	17,871
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	22,696	23,709
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	18,027	18,639
Impaired Financing Receivable, with Related Allowance, Recorded Investment	6,426	2,744
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	6,440	2,870
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	2,914	229
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	4,497	2,836
Commercial Real Estate Construction Financing Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	0	906
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	0	1,179
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	0	1,035
Impaired Financing Receivable, with Related Allowance, Recorded Investment	0	0
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	0	0
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	0	0
Consumer Installment Financing Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	4,460	2,813
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	4,584	3,978
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	4,272	3,338
Impaired Financing Receivable, with Related Allowance, Recorded Investment	20,445	24,472
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	21,024	24,558
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,178	1,014
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	19,513	24,985
Consumer Home Equity Lines Financing Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,723	1,018
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,754	1,347
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	1,792	1,079
Impaired Financing Receivable, with Related Allowance, Recorded Investment	5,656	5,707
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	5,875	5,707
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	207	223
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	5,944	5,874
Consumer Credit Card Financing Receivable
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	16	49
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	16	49
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	32	91
Impaired Financing Receivable, with Related Allowance, Recorded Investment	838	1,064
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	838	1,064
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	296	312
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	966	1,238
Residential Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	12,204	10,250
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	15,119	12,778
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	12,425	10,258
Impaired Financing Receivable, with Related Allowance, Recorded Investment	13,047	12,816
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	13,158	12,898
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	1,283	1,133	1,722
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	13,121	12,064
Total impaired loans with no related allowance
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	46,728	35,410
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	62,376	49,719
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	50,741	41,696
Total impaired loans with a related allowance
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with Related Allowance, Recorded Investment	46,720	52,354
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	47,679	54,525
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	5,950	6,146
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	$ 44,367	$ 52,006