Loans (Summary of the Aging Status of the Recorded Investment in Loans by Portfolio Segment/Class) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 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	$ 17,112	$ 19,581	$ 22,528
Financing receivable, recorded investment 61 to 89 days past due	3,432	7,316	7,000
Financing receivable, recorded investment accruing loans past due 90 days or more	1,535	1,997	932
Financing receivable, recorded investment, Nonaccrual loans	55,635	61,897	56,024
Financing receivable recorded investment, Total past due	77,714	90,791	86,484
Financing receivable, recorded investment, current	4,546,695	4,262,133	3,904,149
Financing receivable, recorded investment, Total loans	4,624,409	4,352,924	3,990,633
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	4,149	4,748	6,572
Financing receivable, recorded investment 61 to 89 days past due	1,901	865	2,251
Financing receivable, recorded investment accruing loans past due 90 days or more	15	536	1
Financing receivable, recorded investment, Nonaccrual loans	18,773	18,374	11,052
Financing receivable recorded investment, Total past due	24,838	24,523	19,876
Financing receivable, recorded investment, current	1,113,685	1,068,170	967,034
Financing receivable, recorded investment, Total loans	1,138,523	1,092,693	986,910
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	5,933	8,560	9,001
Financing receivable, recorded investment 61 to 89 days past due	233	1,604	3,974
Financing receivable, recorded investment accruing loans past due 90 days or more	69	190	78
Financing receivable, recorded investment, Nonaccrual loans	25,361	28,598	28,498
Financing receivable recorded investment, Total past due	31,596	38,952	41,551
Financing receivable, recorded investment, current	1,123,319	1,046,235	962,021
Financing receivable, recorded investment, Total loans	1,154,915	1,085,187	1,003,572
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	0	0
Financing receivable, recorded investment 61 to 89 days past due	0	4,107	0
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0	0
Financing receivable, recorded investment, Nonaccrual loans	160	371	183
Financing receivable recorded investment, Total past due	160	4,478	183
Financing receivable, recorded investment, current	88,415	72,981	60,691
Financing receivable, recorded investment, Total loans	88,575	77,459	60,874
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	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	0	0	0
Financing receivable, recorded investment, Nonaccrual loans	2,184	2,309	3,434
Financing receivable recorded investment, Total past due	2,184	2,309	3,434
Financing receivable, recorded investment, current	4,106	10,971	15,500
Financing receivable, recorded investment, Total loans	6,290	13,280	18,934
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	2,515	2,191	2,871
Financing receivable, recorded investment 61 to 89 days past due	0	103	67
Financing receivable, recorded investment accruing loans past due 90 days or more	376	537	164
Financing receivable, recorded investment, Nonaccrual loans	6,325	8,921	9,241
Financing receivable recorded investment, Total past due	9,216	11,752	12,343
Financing receivable, recorded investment, current	950,769	937,129	873,851
Financing receivable, recorded investment, Total loans	959,985	948,881	886,194
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	2,513	2,630	2,564
Financing receivable, recorded investment 61 to 89 days past due	313	359	359
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0	0
Financing receivable, recorded investment, Nonaccrual loans	536	676	552
Financing receivable recorded investment, Total past due	3,362	3,665	3,475
Financing receivable, recorded investment, current	740,295	639,381	571,431
Financing receivable, recorded investment, Total loans	743,657	643,046	574,906
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	2,002	1,452	1,520
Financing receivable, recorded investment 61 to 89 days past due	985	278	349
Financing receivable, recorded investment accruing loans past due 90 days or more	1,075	734	689
Financing receivable, recorded investment, Nonaccrual loans	2,296	2,648	3,064
Financing receivable recorded investment, Total past due	6,358	5,112	5,622
Financing receivable, recorded investment, current	526,106	487,266	453,621
Financing receivable, recorded investment, Total loans	532,464	492,378	459,243
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	345	397	2,578
Financing receivable, recorded investment 61 to 89 days past due	49	184	78
Financing receivable, recorded investment accruing loans past due 90 days or more	10,447	9,787	8,400
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	10,841	10,368	11,056
Financing receivable, recorded investment, current	263,554	284,329	334,182
Financing receivable, recorded investment, Total loans	274,395	294,697	345,238
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	0	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	6,744	5,656	2,328
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	6,744	5,656	2,328
Financing receivable, recorded investment, current	67,116	77,958	102,656
Financing receivable, recorded investment, Total loans	73,860	83,614	104,984
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	0	0	0
Financing receivable, recorded investment 61 to 89 days past due	0	133	0
Financing receivable, recorded investment accruing loans past due 90 days or more	1,594	1,695	3,389
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	1,594	1,828	3,389
Financing receivable, recorded investment, current	141,856	145,643	165,386
Financing receivable, recorded investment, Total loans	143,450	147,471	168,775
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	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	0	0	0
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	0	0	0
Financing receivable, recorded investment, current	12,593	12,336	12,574
Financing receivable, recorded investment, Total loans	12,593	12,336	12,574
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	2,080
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	1,977	2,332	2,564
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	1,977	2,332	4,644
Financing receivable, recorded investment, current	2,689	4,454	3,603
Financing receivable, recorded investment, Total loans	4,666	6,786	8,247
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	0	0	198
Financing receivable, recorded investment 61 to 89 days past due	0	0	78
Financing receivable, recorded investment accruing loans past due 90 days or more	69	61	0
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	69	61	276
Financing receivable, recorded investment, current	10,343	11,481	12,346
Financing receivable, recorded investment, Total loans	10,412	11,542	12,622
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	20	3	3
Financing receivable, recorded investment 61 to 89 days past due	0	51	0
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0	0
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	20	54	3
Financing receivable, recorded investment, current	1,104	1,669	2,332
Financing receivable, recorded investment, Total loans	1,124	1,723	2,335
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	325	394	297
Financing receivable, recorded investment 61 to 89 days past due	49	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	63	43	119
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	437	437	416
Financing receivable, recorded investment, current	27,853	30,788	35,285
Financing receivable, recorded investment, Total loans	$ 28,290	$ 31,225	$ 35,701