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, 2012	Dec. 31, 2011
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	$ 17,045	$ 26,252
Financing receivable, recorded investment 61 to 89 days past due	3,679	11,167
Financing receivable, recorded investment accruing loans past due 90 days or more	2,359	3,817
Financing receivable, recorded investment, Non-accrual loans	71,298	78,394
Financing receivable recorded investment, Total past due	94,381	119,630
Financing receivable, recorded investment, Current	3,680,759	3,218,872
Financing receivable, recorded investment, Total loans	3,775,140	3,338,502
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	3,999	5,207
Financing receivable, recorded investment 61 to 89 days past due	730	6,268
Financing receivable, recorded investment accruing loans past due 90 days or more	0	1,381
Financing receivable, recorded investment, Non-accrual loans	14,601	10,726
Financing receivable recorded investment, Total past due	19,330	23,582
Financing receivable, recorded investment, Current	877,280	739,953
Financing receivable, recorded investment, Total loans	896,610	763,535
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	5,852	9,967
Financing receivable, recorded investment 61 to 89 days past due	2,089	3,241
Financing receivable, recorded investment accruing loans past due 90 days or more	87	374
Financing receivable, recorded investment, Non-accrual loans	37,660	44,438
Financing receivable recorded investment, Total past due	45,688	58,020
Financing receivable, recorded investment, Current	910,477	757,047
Financing receivable, recorded investment, Total loans	956,165	815,067
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
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	287
Financing receivable, recorded investment, Non-accrual loans	1,217	0
Financing receivable recorded investment, Total past due	1,217	287
Financing receivable, recorded investment, Current	47,906	54,029
Financing receivable, recorded investment, Total loans	49,123	54,316
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	4,184	6,190
Financing receivable recorded investment, Total past due	4,184	6,190
Financing receivable, recorded investment, Current	21,874	24,065
Financing receivable, recorded investment, Total loans	26,058	30,255
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	3,161	5,591
Financing receivable, recorded investment 61 to 89 days past due	55	76
Financing receivable, recorded investment accruing loans past due 90 days or more	1,503	752
Financing receivable, recorded investment, Non-accrual loans	10,164	12,573
Financing receivable recorded investment, Total past due	14,883	18,992
Financing receivable, recorded investment, Current	854,987	821,760
Financing receivable, recorded investment, Total loans	869,870	840,752
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	2,415	3,449
Financing receivable, recorded investment 61 to 89 days past due	378	1,174
Financing receivable, recorded investment accruing loans past due 90 days or more	0	0
Financing receivable, recorded investment, Non-accrual loans	739	1,707
Financing receivable recorded investment, Total past due	3,532	6,330
Financing receivable, recorded investment, Current	540,546	474,614
Financing receivable, recorded investment, Total loans	544,078	480,944
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	1,618	2,038
Financing receivable, recorded investment 61 to 89 days past due	427	408
Financing receivable, recorded investment accruing loans past due 90 days or more	769	1,023
Financing receivable, recorded investment, Non-accrual loans	2,733	2,760
Financing receivable recorded investment, Total past due	5,547	6,229
Financing receivable, recorded investment, Current	427,689	347,404
Financing receivable, recorded investment, Total loans	433,236	353,633
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	625	3,192
Financing receivable, recorded investment 61 to 89 days past due	15	273
Financing receivable, recorded investment accruing loans past due 90 days or more	9,099	17,375
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	9,739	20,840
Financing receivable, recorded investment, Current	382,856	471,943
Financing receivable, recorded investment, Total loans	392,595	492,783
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	394
Financing receivable, recorded investment 61 to 89 days past due	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	2,834	7,808
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	2,834	8,202
Financing receivable, recorded investment, Current	103,278	123,413
Financing receivable, recorded investment, Total loans	106,112	131,615
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	287	1,820
Financing receivable, recorded investment 61 to 89 days past due	15	0
Financing receivable, recorded investment accruing loans past due 90 days or more	3,139	2,592
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	3,441	4,412
Financing receivable, recorded investment, Current	202,255	252,520
Financing receivable, recorded investment, Total loans	205,696	256,932
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	156
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	0	156
Financing receivable, recorded investment, Current	13,566	18,883
Financing receivable, recorded investment, Total loans	13,566	19,039
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	2,834	4,780
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	2,834	4,780
Financing receivable, recorded investment, Current	8,656	9,786
Financing receivable, recorded investment, Total loans	11,490	14,566
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	123	288
Financing receivable, recorded investment 61 to 89 days past due	0	0
Financing receivable, recorded investment accruing loans past due 90 days or more	122	1,577
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	245	1,865
Financing receivable, recorded investment, Current	13,720	19,099
Financing receivable, recorded investment, Total loans	13,965	20,964
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	10	49
Financing receivable, recorded investment 61 to 89 days past due	0	11
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	10	60
Financing receivable, recorded investment, Current	1,948	3,054
Financing receivable, recorded investment, Total loans	1,958	3,114
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	205	641
Financing receivable, recorded investment 61 to 89 days past due	0	262
Financing receivable, recorded investment accruing loans past due 90 days or more	170	462
Financing receivable, recorded investment, Non-accrual loans	0	0
Financing receivable recorded investment, Total past due	375	1,365
Financing receivable, recorded investment, Current	39,433	45,188
Financing receivable, recorded investment, Total loans	$ 39,808	$ 46,553