Loans (Summary of the Aging Status of the Recorded Investment in Loans by Portfolio Segment/Class) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 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	$ 14,824	$ 19,581	$ 24,087
Financing receivable, recorded investment 61 to 89 days past due	4,637	7,316	5,795
Financing receivable, recorded investment accruing loans past due 90 days or more	1,395	1,997	1,251
Financing receivable, recorded investment, Nonaccrual loans	57,687	61,897	66,251
Financing receivable recorded investment, Total past due	78,543	90,791	97,384
Financing receivable, recorded investment, current	4,385,922	4,262,133	3,713,605
Financing receivable, recorded investment, Total loans	4,464,465	4,352,924	3,810,989
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	6,003	4,748	7,948
Financing receivable, recorded investment 61 to 89 days past due	1,832	865	1,664
Financing receivable, recorded investment accruing loans past due 90 days or more	43	536	4
Financing receivable, recorded investment, Nonaccrual loans	18,251	18,374	12,186
Financing receivable recorded investment, Total past due	26,129	24,523	21,802
Financing receivable, recorded investment, current	1,104,992	1,068,170	913,144
Financing receivable, recorded investment, Total loans	1,131,121	1,092,693	934,946
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	4,094	8,560	9,195
Financing receivable, recorded investment 61 to 89 days past due	1,098	1,604	2,541
Financing receivable, recorded investment accruing loans past due 90 days or more	730	190	177
Financing receivable, recorded investment, Nonaccrual loans	27,568	28,598	35,849
Financing receivable recorded investment, Total past due	33,490	38,952	47,762
Financing receivable, recorded investment, current	1,095,228	1,046,235	920,533
Financing receivable, recorded investment, Total loans	1,128,718	1,085,187	968,295
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	18	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	168
Financing receivable recorded investment, Total past due	178	4,478	168
Financing receivable, recorded investment, current	72,227	72,981	51,680
Financing receivable, recorded investment, Total loans	72,405	77,459	51,848
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	927
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	2,267	2,309	4,105
Financing receivable recorded investment, Total past due	2,267	2,309	5,032
Financing receivable, recorded investment, current	5,499	10,971	16,981
Financing receivable, recorded investment, Total loans	7,766	13,280	22,013
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	1,259	2,191	2,605
Financing receivable, recorded investment 61 to 89 days past due	1,138	103	831
Financing receivable, recorded investment accruing loans past due 90 days or more	0	537	196
Financing receivable, recorded investment, Nonaccrual loans	6,589	8,921	10,407
Financing receivable recorded investment, Total past due	8,986	11,752	14,039
Financing receivable, recorded investment, current	941,815	937,129	845,132
Financing receivable, recorded investment, Total loans	950,801	948,881	859,171
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	1,950	2,630	2,038
Financing receivable, recorded investment 61 to 89 days past due	313	359	524
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0	0
Financing receivable, recorded investment, Nonaccrual loans	806	676	699
Financing receivable recorded investment, Total past due	3,069	3,665	3,261
Financing receivable, recorded investment, current	670,721	639,381	535,255
Financing receivable, recorded investment, Total loans	673,790	643,046	538,516
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	1,500	1,452	1,374
Financing receivable, recorded investment 61 to 89 days past due	256	278	235
Financing receivable, recorded investment accruing loans past due 90 days or more	622	734	874
Financing receivable, recorded investment, Nonaccrual loans	2,046	2,648	2,837
Financing receivable recorded investment, Total past due	4,424	5,112	5,320
Financing receivable, recorded investment, current	495,440	487,266	430,880
Financing receivable, recorded investment, Total loans	499,864	492,378	436,200
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	98	397	1,263
Financing receivable, recorded investment 61 to 89 days past due	0	184	190
Financing receivable, recorded investment accruing loans past due 90 days or more	11,523	9,787	8,609
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	11,621	10,368	10,062
Financing receivable, recorded investment, current	277,203	284,329	364,210
Financing receivable, recorded investment, Total loans	288,824	294,697	374,272
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	191
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	6,496	5,656	2,504
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	6,496	5,656	2,695
Financing receivable, recorded investment, current	71,024	77,958	100,474
Financing receivable, recorded investment, Total loans	77,520	83,614	103,169
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	479
Financing receivable, recorded investment 61 to 89 days past due	0	133	157
Financing receivable, recorded investment accruing loans past due 90 days or more	2,549	1,695	3,341
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	2,549	1,828	3,977
Financing receivable, recorded investment, current	147,900	145,643	190,111
Financing receivable, recorded investment, Total loans	150,449	147,471	194,088
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	12,679	12,336	13,519
Financing receivable, recorded investment, Total loans	12,679	12,336	13,519
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	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	2,089	2,332	2,602
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	2,089	2,332	2,602
Financing receivable, recorded investment, current	3,906	4,454	8,025
Financing receivable, recorded investment, Total loans	5,995	6,786	10,627
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	405
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	58	61	0
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	58	61	405
Financing receivable, recorded investment, current	11,150	11,481	12,878
Financing receivable, recorded investment, Total loans	11,208	11,542	13,283
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	49	3	34
Financing receivable, recorded investment 61 to 89 days past due	0	51	33
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	49	54	67
Financing receivable, recorded investment, current	1,573	1,669	1,633
Financing receivable, recorded investment, Total loans	1,622	1,723	1,700
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	49	394	154
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	331	43	162
Financing receivable, recorded investment, Nonaccrual loans	0	0	0
Financing receivable recorded investment, Total past due	380	437	316
Financing receivable, recorded investment, current	28,971	30,788	37,570
Financing receivable, recorded investment, Total loans	$ 29,351	$ 31,225	$ 37,886