Loans (Summary of the Aging Status of the Recorded Investment in Loans by Portfolio Segment/Class) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
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	$ 20,595	$ 19,581
Financing receivable, recorded investment 61 to 89 days past due	3,352	7,316
Financing receivable, recorded investment accruing loans past due 90 days or more	2,073	1,997
Financing receivable, recorded investment, Non-accrual loans	50,644	61,897
Financing receivable recorded investment, Total past due	76,664	90,791
Financing receivable, recorded investment, Current	4,913,403	4,262,133
Financing receivable, recorded investment, Total loans	4,990,067	4,352,924
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	4,033	4,748
Financing receivable, recorded investment 61 to 89 days past due	743	865
Financing receivable, recorded investment accruing loans past due 90 days or more	170	536
Financing receivable, recorded investment, Non-accrual loans	16,418	18,374
Financing receivable recorded investment, Total past due	21,364	24,523
Financing receivable, recorded investment, Current	1,234,534	1,068,170
Financing receivable, recorded investment, Total loans	1,255,898	1,092,693
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	7,515	8,560
Financing receivable, recorded investment 61 to 89 days past due	1,383	1,604
Financing receivable, recorded investment accruing loans past due 90 days or more	0	190
Financing receivable, recorded investment, Non-accrual loans	24,966	28,598
Financing receivable recorded investment, Total past due	33,864	38,952
Financing receivable, recorded investment, Current	1,170,562	1,046,235
Financing receivable, recorded investment, Total loans	1,204,426	1,085,187
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	262	0
Financing receivable, recorded investment 61 to 89 days past due	0	4,107
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0
Financing receivable, recorded investment, Non-accrual loans	162	371
Financing receivable recorded investment, Total past due	424	4,478
Financing receivable, recorded investment, Current	138,316	72,981
Financing receivable, recorded investment, Total loans	138,740	77,459
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	225	2,309
Financing receivable recorded investment, Total past due	225	2,309
Financing receivable, recorded investment, Current	4,303	10,971
Financing receivable, recorded investment, Total loans	4,528	13,280
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	2,126	2,191
Financing receivable, recorded investment 61 to 89 days past due	54	103
Financing receivable, recorded investment accruing loans past due 90 days or more	557	537
Financing receivable, recorded investment, Non-accrual loans	6,706	8,921
Financing receivable recorded investment, Total past due	9,443	11,752
Financing receivable, recorded investment, Current	988,558	937,129
Financing receivable, recorded investment, Total loans	998,001	948,881
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	3,620	2,630
Financing receivable, recorded investment 61 to 89 days past due	512	359
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0
Financing receivable, recorded investment, Non-accrual loans	500	676
Financing receivable recorded investment, Total past due	4,632	3,665
Financing receivable, recorded investment, Current	814,746	639,381
Financing receivable, recorded investment, Total loans	819,378	643,046
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	3,039	1,452
Financing receivable, recorded investment 61 to 89 days past due	660	278
Financing receivable, recorded investment accruing loans past due 90 days or more	1,346	734
Financing receivable, recorded investment, Non-accrual loans	1,667	2,648
Financing receivable recorded investment, Total past due	6,712	5,112
Financing receivable, recorded investment, Current	562,384	487,266
Financing receivable, recorded investment, Total loans	569,096	492,378
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	2,994	397
Financing receivable, recorded investment 61 to 89 days past due	461	184
Financing receivable, recorded investment accruing loans past due 90 days or more	19,892	9,787
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	23,347	10,368
Financing receivable, recorded investment, Current	674,816	284,329
Financing receivable, recorded investment, Total loans	698,163	294,697
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	133	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	5,427	5,656
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	5,560	5,656
Financing receivable, recorded investment, Current	93,423	77,958
Financing receivable, recorded investment, Total loans	98,983	83,614
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	2,014	0
Financing receivable, recorded investment 61 to 89 days past due	352	133
Financing receivable, recorded investment accruing loans past due 90 days or more	11,052	1,695
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	13,418	1,828
Financing receivable, recorded investment, Current	339,804	145,643
Financing receivable, recorded investment, Total loans	353,222	147,471
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	14,005	12,336
Financing receivable, recorded investment, Total loans	14,005	12,336
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	1,653	2,332
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	1,653	2,332
Financing receivable, recorded investment, Current	12,569	4,454
Financing receivable, recorded investment, Total loans	14,222	6,786
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	156	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	18	61
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	174	61
Financing receivable, recorded investment, Current	112,215	11,481
Financing receivable, recorded investment, Total loans	112,389	11,542
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	3
Financing receivable, recorded investment 61 to 89 days past due	3	51
Financing receivable, recorded investment accruing loans past due 90 days or more	454	0
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	512	54
Financing receivable, recorded investment, Current	9,680	1,669
Financing receivable, recorded investment, Total loans	10,192	1,723
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	636	394
Financing receivable, recorded investment 61 to 89 days past due	106	0
Financing receivable, recorded investment accruing loans past due 90 days or more	1,288	43
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	2,030	437
Financing receivable, recorded investment, Current	93,120	30,788
Financing receivable, recorded investment, Total loans	$ 95,150	$ 31,225