Loans (Summary of the Aging Status of the Recorded Investment in Loans by Portfolio Segment/Class) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Originated Portfolio [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	$ 20,831	$ 14,502	$ 13,618
Financing receivable, recorded investment 61 to 89 days past due	2,085	4,265	3,940
Financing receivable, recorded investment accruing loans past due 90 days or more	1,484	2,287	1,779
Financing receivable, recorded investment, Nonaccrual loans	43,997	62,225	51,215
Financing receivable recorded investment, Total past due	68,397	83,279	70,552
Financing receivable, recorded investment, current	6,310,537	5,724,655	5,280,458
Financing receivable, recorded investment, Total loans	6,378,934	5,807,934	5,351,010
Originated Portfolio [Member] | Commercial [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	4,522	3,685	4,055
Financing receivable, recorded investment 61 to 89 days past due	822	1,230	2,317
Financing receivable, recorded investment accruing loans past due 90 days or more	3	364	711
Financing receivable, recorded investment, Nonaccrual loans	14,577	28,554	17,260
Financing receivable recorded investment, Total past due	19,924	33,833	24,343
Financing receivable, recorded investment, current	1,614,069	1,487,682	1,335,513
Financing receivable, recorded investment, Total loans	1,633,993	1,521,515	1,359,856
Originated Portfolio [Member] | Real estate commercial [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	8,842	4,168	2,754
Financing receivable, recorded investment 61 to 89 days past due	343	1,603	1,117
Financing receivable, recorded investment accruing loans past due 90 days or more	3	254	56
Financing receivable, recorded investment, Nonaccrual loans	21,325	25,163	25,287
Financing receivable recorded investment, Total past due	30,513	31,188	29,214
Financing receivable, recorded investment, current	1,522,425	1,392,871	1,334,212
Financing receivable, recorded investment, Total loans	1,552,938	1,424,059	1,363,426
Originated Portfolio [Member] | Real estate construction [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	62	0	413
Financing receivable, recorded investment 61 to 89 days past due	0	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0	0
Financing receivable, recorded investment, Nonaccrual loans	496	521	502
Financing receivable recorded investment, Total past due	558	521	915
Financing receivable, recorded investment, current	240,492	184,626	99,511
Financing receivable, recorded investment, Total loans	241,050	185,147	100,426
Originated Portfolio [Member] | Real estate residential [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	1,955	1,737	1,536
Financing receivable, recorded investment 61 to 89 days past due	0	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	407	402	424
Financing receivable, recorded investment, Nonaccrual loans	5,343	5,557	6,004
Financing receivable recorded investment, Total past due	7,705	7,696	7,964
Financing receivable, recorded investment, current	1,299,660	1,209,279	1,060,525
Financing receivable, recorded investment, Total loans	1,307,365	1,216,975	1,068,489
Originated Portfolio [Member] | Consumer installment [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	2,856	3,145	2,526
Financing receivable, recorded investment 61 to 89 days past due	554	644	302
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0	0
Financing receivable, recorded investment, Nonaccrual loans	285	451	393
Financing receivable recorded investment, Total past due	3,695	4,240	3,221
Financing receivable, recorded investment, current	1,038,568	865,186	868,715
Financing receivable, recorded investment, Total loans	1,042,263	869,426	871,936
Originated Portfolio [Member] | Home equity [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	2,594	1,767	2,334
Financing receivable, recorded investment 61 to 89 days past due	366	788	204
Financing receivable, recorded investment accruing loans past due 90 days or more	1,071	1,267	588
Financing receivable, recorded investment, Nonaccrual loans	1,971	1,979	1,769
Financing receivable recorded investment, Total past due	6,002	5,801	4,895
Financing receivable, recorded investment, current	595,323	585,011	581,982
Financing receivable, recorded investment, Total loans	601,325	590,812	586,877
Acquired Portfolio [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	1,907	6,319	3,889
Financing receivable, recorded investment 61 to 89 days past due	63	1,301	695
Financing receivable, recorded investment accruing loans past due 90 days or more	12,538	12,795	15,934
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	14,508	20,415	20,518
Financing receivable, recorded investment, current	1,253,827	1,442,798	1,663,215
Financing receivable, recorded investment, Total loans	1,268,335	1,463,213	1,683,733
Acquired Portfolio [Member] | Commercial [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	547	490	690
Financing receivable, recorded investment 61 to 89 days past due	0	532	0
Financing receivable, recorded investment accruing loans past due 90 days or more	3,038	3,735	3,781
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	3,585	4,757	4,471
Financing receivable, recorded investment, current	315,723	379,607	390,546
Financing receivable, recorded investment, Total loans	319,308	384,364	395,017
Acquired Portfolio [Member] | Real estate commercial [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	90	3,557	969
Financing receivable, recorded investment 61 to 89 days past due	0	691	291
Financing receivable, recorded investment accruing loans past due 90 days or more	5,817	4,771	6,603
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	5,907	9,019	7,863
Financing receivable, recorded investment, current	598,888	679,084	872,224
Financing receivable, recorded investment, Total loans	604,795	688,103	880,087
Acquired Portfolio [Member] | Real estate construction [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	389	0	0
Financing receivable, recorded investment 61 to 89 days past due	0	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	1,398	1,154	1,557
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	1,787	1,154	1,557
Financing receivable, recorded investment, current	43,011	45,775	10,329
Financing receivable, recorded investment, Total loans	44,798	46,929	11,886
Acquired Portfolio [Member] | Real estate residential [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	407	1,370	1,077
Financing receivable, recorded investment 61 to 89 days past due	0	0	138
Financing receivable, recorded investment accruing loans past due 90 days or more	1,335	2,081	2,980
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	1,742	3,451	4,195
Financing receivable, recorded investment, current	185,085	209,210	237,483
Financing receivable, recorded investment, Total loans	186,827	212,661	241,678
Acquired Portfolio [Member] | Consumer installment [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	58	55	0
Financing receivable, recorded investment 61 to 89 days past due	25	0	56
Financing receivable, recorded investment accruing loans past due 90 days or more	62	47	5
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	145	102	61
Financing receivable, recorded investment, current	6,214	7,929	15,910
Financing receivable, recorded investment, Total loans	6,359	8,031	15,971
Acquired Portfolio [Member] | Home equity [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	416	847	1,153
Financing receivable, recorded investment 61 to 89 days past due	38	78	210
Financing receivable, recorded investment accruing loans past due 90 days or more	888	1,007	1,008
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	1,342	1,932	2,371
Financing receivable, recorded investment, current	104,906	121,193	136,723
Financing receivable, recorded investment, Total loans	$ 106,248	$ 123,125	$ 139,094