Loans (Summary of the Aging Status of the Recorded Investment in Loans by Portfolio Segment/Class) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
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	$ 14,502	$ 20,595
Financing receivable, recorded investment 61 to 89 days past due	4,265	3,352
Financing receivable, recorded investment accruing loans past due 90 days or more	2,287	2,073
Financing receivable, recorded investment, Non-accrual loans	62,225	50,644
Financing receivable recorded investment, Total past due	83,279	76,664
Financing receivable, recorded investment, Current	5,724,655	4,913,403
Financing receivable, recorded investment, Total loans	5,807,934	4,990,067
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	3,685	4,033
Financing receivable, recorded investment 61 to 89 days past due	1,230	743
Financing receivable, recorded investment accruing loans past due 90 days or more	364	170
Financing receivable, recorded investment, Non-accrual loans	28,554	16,418
Financing receivable recorded investment, Total past due	33,833	21,364
Financing receivable, recorded investment, Current	1,487,682	1,234,534
Financing receivable, recorded investment, Total loans	1,521,515	1,255,898
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	4,168	7,515
Financing receivable, recorded investment 61 to 89 days past due	1,603	1,383
Financing receivable, recorded investment accruing loans past due 90 days or more	254	0
Financing receivable, recorded investment, Non-accrual loans	25,163	24,966
Financing receivable recorded investment, Total past due	31,188	33,864
Financing receivable, recorded investment, Current	1,392,871	1,170,562
Financing receivable, recorded investment, Total loans	1,424,059	1,204,426
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	0	262
Financing receivable, recorded investment 61 to 89 days past due	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0
Financing receivable, recorded investment, Non-accrual loans	247	162
Financing receivable recorded investment, Total past due	247	424
Financing receivable, recorded investment, Current	174,299	138,316
Financing receivable, recorded investment, Total loans	174,546	138,740
Originated Portfolio [Member] | Land development [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	0	0
Financing receivable, recorded investment 61 to 89 days past due	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0
Financing receivable, recorded investment, Non-accrual loans	274	225
Financing receivable recorded investment, Total past due	274	225
Financing receivable, recorded investment, Current	10,327	4,303
Financing receivable, recorded investment, Total loans	10,601	4,528
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	1,737	2,126
Financing receivable, recorded investment 61 to 89 days past due	0	54
Financing receivable, recorded investment accruing loans past due 90 days or more	402	557
Financing receivable, recorded investment, Non-accrual loans	5,557	6,706
Financing receivable recorded investment, Total past due	7,696	9,443
Financing receivable, recorded investment, Current	1,209,279	988,558
Financing receivable, recorded investment, Total loans	1,216,975	998,001
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	3,145	3,620
Financing receivable, recorded investment 61 to 89 days past due	644	512
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0
Financing receivable, recorded investment, Non-accrual loans	451	500
Financing receivable recorded investment, Total past due	4,240	4,632
Financing receivable, recorded investment, Current	865,186	814,746
Financing receivable, recorded investment, Total loans	869,426	819,378
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	1,767	3,039
Financing receivable, recorded investment 61 to 89 days past due	788	660
Financing receivable, recorded investment accruing loans past due 90 days or more	1,267	1,346
Financing receivable, recorded investment, Non-accrual loans	1,979	1,667
Financing receivable recorded investment, Total past due	5,801	6,712
Financing receivable, recorded investment, Current	585,011	562,384
Financing receivable, recorded investment, Total loans	590,812	569,096
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	6,319	2,994
Financing receivable, recorded investment 61 to 89 days past due	1,301	461
Financing receivable, recorded investment accruing loans past due 90 days or more	12,795	19,892
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	20,415	23,347
Financing receivable, recorded investment, Current	1,442,798	674,816
Financing receivable, recorded investment, Total loans	1,463,213	698,163
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	490	133
Financing receivable, recorded investment 61 to 89 days past due	532	0
Financing receivable, recorded investment accruing loans past due 90 days or more	3,735	5,427
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	4,757	5,560
Financing receivable, recorded investment, Current	379,607	93,423
Financing receivable, recorded investment, Total loans	384,364	98,983
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	3,557	2,014
Financing receivable, recorded investment 61 to 89 days past due	691	352
Financing receivable, recorded investment accruing loans past due 90 days or more	4,771	11,052
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	9,019	13,418
Financing receivable, recorded investment, Current	679,084	339,804
Financing receivable, recorded investment, Total loans	688,103	353,222
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	0	0
Financing receivable, recorded investment 61 to 89 days past due	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	0	0
Financing receivable, recorded investment, Current	35,685	14,005
Financing receivable, recorded investment, Total loans	35,685	14,005
Acquired Portfolio [Member] | Land development [Member]
Schedule representing the aging status of the recorded investment in loans by classes
Financing receivable, recorded investment 31 to 60 days past due	0	0
Financing receivable, recorded investment 61 to 89 days past due	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	1,154	1,653
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	1,154	1,653
Financing receivable, recorded investment, Current	10,090	12,569
Financing receivable, recorded investment, Total loans	11,244	14,222
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	1,370	156
Financing receivable, recorded investment 61 to 89 days past due	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	2,081	18
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	3,451	174
Financing receivable, recorded investment, Current	209,210	112,215
Financing receivable, recorded investment, Total loans	212,661	112,389
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	55	55
Financing receivable, recorded investment 61 to 89 days past due	0	3
Financing receivable, recorded investment accruing loans past due 90 days or more	47	454
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	102	512
Financing receivable, recorded investment, Current	7,929	9,680
Financing receivable, recorded investment, Total loans	8,031	10,192
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	847	636
Financing receivable, recorded investment 61 to 89 days past due	78	106
Financing receivable, recorded investment accruing loans past due 90 days or more	1,007	1,288
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	1,932	2,030
Financing receivable, recorded investment, Current	121,193	93,120
Financing receivable, recorded investment, Total loans	$ 123,125	$ 95,150