Allowance for Loan Losses (Troubled Debt Restructurings on Financing Receivables) (Details) $ in Thousands	Dec. 31, 2015 USD ($) loans	Dec. 31, 2014 USD ($) loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	2,402	2,494
Recorded Investment	$ 160,928	$ 130,458
Unpaid Principal Balance	$ 165,694	$ 173,976
Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	2,054	2,167
Recorded Investment	$ 116,364	$ 83,119
Unpaid Principal Balance	$ 122,044	$ 98,900
Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	262	216
Recorded Investment	$ 19,518	$ 12,100
Unpaid Principal Balance	$ 20,026	$ 12,474
Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	86	111
Recorded Investment	$ 25,046	$ 35,239
Unpaid Principal Balance	$ 23,624	$ 62,602
Commercial and Industrial Financing Receivable
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	27	51
Recorded Investment	$ 40,698	$ 7,318
Unpaid Principal Balance	$ 41,351	$ 15,495
Commercial and Industrial Financing Receivable | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	26	41
Recorded Investment	$ 33,087	$ 7,123
Unpaid Principal Balance	$ 33,740	$ 13,887
Commercial and Industrial Financing Receivable | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1	2
Recorded Investment	$ 7,611	$ 18
Unpaid Principal Balance	$ 7,611	$ 19
Commercial and Industrial Financing Receivable | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	0	8
Recorded Investment	$ 0	$ 177
Unpaid Principal Balance	$ 0	$ 1,589
Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	30	94
Recorded Investment	$ 29,645	$ 45,648
Unpaid Principal Balance	$ 30,171	$ 67,466
Commercial Real Estate | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	24	67
Recorded Investment	$ 14,671	$ 17,607
Unpaid Principal Balance	$ 16,648	$ 22,645
Commercial Real Estate | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	3	3
Recorded Investment	$ 918	$ 2,542
Unpaid Principal Balance	$ 1,044	$ 2,595
Commercial Real Estate | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	3	24
Recorded Investment	$ 14,056	$ 25,499
Unpaid Principal Balance	$ 12,479	$ 42,226
Construction Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1	40
Recorded Investment	$ 593	$ 339
Unpaid Principal Balance	$ 682	$ 9,552
Construction Loans | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	0	31
Recorded Investment	$ 0	$ 0
Unpaid Principal Balance	$ 0	$ 0
Construction Loans | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	0
Recorded Investment	$ 0
Unpaid Principal Balance	$ 0
Construction Loans | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1	9
Recorded Investment	$ 593	$ 339
Unpaid Principal Balance	$ 682	$ 9,552
Commercial Loan
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	58	185
Recorded Investment	$ 70,936	$ 53,305
Unpaid Principal Balance	$ 72,204	$ 92,513
Commercial Loan | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	50	139
Recorded Investment	$ 47,758	$ 24,730
Unpaid Principal Balance	$ 50,388	$ 36,532
Commercial Loan | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	4	5
Recorded Investment	$ 8,529	$ 2,560
Unpaid Principal Balance	$ 8,655	$ 2,614
Commercial Loan | Covered Loans Commercial
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	4	41
Recorded Investment	$ 14,649	$ 26,015
Unpaid Principal Balance	$ 13,161	$ 53,367
Installment
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1,274	1,245
Recorded Investment	$ 38,021	$ 25,880
Unpaid Principal Balance	$ 38,461	$ 26,662
Installment | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1,223	1,205
Recorded Investment	$ 36,904	$ 24,905
Unpaid Principal Balance	$ 37,250	$ 25,608
Installment | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	51	40
Recorded Investment	$ 1,117	$ 975
Unpaid Principal Balance	$ 1,211	$ 1,054
Home Equity Line of Credit
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	514	483
Recorded Investment	$ 25,013	$ 23,201
Unpaid Principal Balance	$ 25,389	$ 23,513
Home Equity Line of Credit | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	257	270
Recorded Investment	$ 7,080	$ 7,379
Unpaid Principal Balance	$ 7,330	$ 7,629
Home Equity Line of Credit | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	176	145
Recorded Investment	$ 7,718	$ 6,932
Unpaid Principal Balance	$ 7,778	$ 6,983
Home Equity Line of Credit | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	81	68
Recorded Investment	$ 10,215	$ 8,890
Unpaid Principal Balance	$ 10,281	$ 8,901
Credit Card Receivable
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	212	238
Recorded Investment	$ 717	$ 854
Unpaid Principal Balance	$ 717	$ 854
Credit Card Receivable | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	212	238
Recorded Investment	$ 717	$ 854
Unpaid Principal Balance	$ 717	$ 854
Reserve on residential mortgage loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	344	343
Recorded Investment	$ 26,241	$ 27,218
Unpaid Principal Balance	$ 28,923	$ 30,434
Reserve on residential mortgage loans | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	312	315
Recorded Investment	$ 23,905	$ 25,251
Unpaid Principal Balance	$ 26,359	$ 28,277
Reserve on residential mortgage loans | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	31	26
Recorded Investment	$ 2,154	$ 1,633
Unpaid Principal Balance	$ 2,382	$ 1,823
Reserve on residential mortgage loans | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	1	2
Recorded Investment	$ 182	$ 334
Unpaid Principal Balance	$ 182	$ 334
Consumer Loan
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	2,344	2,309
Recorded Investment	$ 89,992	$ 77,153
Unpaid Principal Balance	$ 93,490	$ 81,463
Consumer Loan | Originated Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	2,004	2,028
Recorded Investment	$ 68,606	$ 58,389
Unpaid Principal Balance	$ 71,656	$ 62,368
Consumer Loan | Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	258	211
Recorded Investment	$ 10,989	$ 9,540
Unpaid Principal Balance	$ 11,371	$ 9,860
Consumer Loan | Covered Consumer Loans
Financing Receivable, Modifications [Line Items]
Number of contracts at period end | loans	82	70
Recorded Investment	$ 10,397	$ 9,224
Unpaid Principal Balance	$ 10,463	$ 9,235