Loans and Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Allowance for loan losses:
Charge-offs	$ (15,289)	$ (21,930)
Recoveries	4,224	3,756
Provision	1,886	13,619
Non-acquired loans
Allowance for loan losses:
Balance at the beginning of the period	44,378	49,367
Charge-offs	(15,289)	(21,930)
Recoveries	4,224	3,756
Provision	1,018	13,185
Balance at the end of the period	34,331	44,378
Loans individually evaluated for impairment	1,631	4,879
Loans collectively evaluated for impairment	32,700	39,499
Loans:
Loans individually evaluated for impairment	26,047	47,235
Loans collectively evaluated for impairment	2,839,169	2,523,768
Total loans	2,865,216	2,571,003
Non-acquired loans | Construction & Land Development
Allowance for loan losses:
Balance at the beginning of the period	10,836	12,373
Charge-offs	(4,656)	(8,454)
Recoveries	1,395	1,428
Provision	(786)	5,489
Balance at the end of the period	6,789	10,836
Loans individually evaluated for impairment	704	1,573
Loans collectively evaluated for impairment	6,085	9,263
Loans:
Loans individually evaluated for impairment	5,739	13,549
Loans collectively evaluated for impairment	294,212	259,871
Total loans	299,951	273,420
Non-acquired loans | Commercial Non-owner Occupied
Allowance for loan losses:
Balance at the beginning of the period	4,921	6,109
Charge-offs	(660)	(2,348)
Recoveries	353	282
Provision	(937)	878
Balance at the end of the period	3,677	4,921
Loans individually evaluated for impairment		411
Loans collectively evaluated for impairment	3,677	4,510
Loans:
Loans individually evaluated for impairment	2,681	5,344
Loans collectively evaluated for impairment	288,490	284,727
Total loans	291,171	290,071
Non-acquired loans | Commercial Owner Occupied
Allowance for loan losses:
Balance at the beginning of the period	8,743	10,356
Charge-offs	(2,695)	(2,781)
Recoveries	41	5
Provision	1,678	1,163
Balance at the end of the period	7,767	8,743
Loans individually evaluated for impairment	10	648
Loans collectively evaluated for impairment	7,757	8,095
Loans:
Loans individually evaluated for impairment	11,560	20,212
Loans collectively evaluated for impairment	821,953	763,940
Total loans	833,513	784,152
Non-acquired loans | Consumer Owner Occupied
Allowance for loan losses:
Balance at the beginning of the period	6,568	7,453
Charge-offs	(1,462)	(1,850)
Recoveries	633	124
Provision	330	841
Balance at the end of the period	6,069	6,568
Loans individually evaluated for impairment	271	213
Loans collectively evaluated for impairment	5,798	6,355
Loans:
Loans individually evaluated for impairment	3,013	1,954
Loans collectively evaluated for impairment	545,157	432,549
Total loans	548,170	434,503
Non-acquired loans | Home Equity
Allowance for loan losses:
Balance at the beginning of the period	3,626	4,269
Charge-offs	(1,219)	(1,394)
Recoveries	228	600
Provision	147	151
Balance at the end of the period	2,782	3,626
Loans collectively evaluated for impairment	2,782	3,626
Loans:
Loans collectively evaluated for impairment	257,139	255,284
Total loans	257,139	255,284
Non-acquired loans | Commercial & Industrial
Allowance for loan losses:
Balance at the beginning of the period	4,939	3,901
Charge-offs	(1,329)	(2,033)
Recoveries	514	228
Provision	(532)	2,843
Balance at the end of the period	3,592	4,939
Loans individually evaluated for impairment		1,030
Loans collectively evaluated for impairment	3,592	3,909
Loans:
Loans individually evaluated for impairment	405	1,783
Loans collectively evaluated for impairment	321,419	277,980
Total loans	321,824	279,763
Non-acquired loans | Other Income Producing Property
Allowance for loan losses:
Balance at the beginning of the period	3,747	3,636
Charge-offs	(816)	(924)
Recoveries	224	361
Provision	(646)	674
Balance at the end of the period	2,509	3,747
Loans individually evaluated for impairment	646	1,004
Loans collectively evaluated for impairment	1,863	2,743
Loans:
Loans individually evaluated for impairment	2,649	4,393
Loans collectively evaluated for impairment	140,555	129,320
Total loans	143,204	133,713
Non-acquired loans | Consumer
Allowance for loan losses:
Balance at the beginning of the period	781	1,145
Charge-offs	(2,452)	(2,146)
Recoveries	836	728
Provision	1,772	1,054
Balance at the end of the period	937	781
Loans collectively evaluated for impairment	937	781
Loans:
Loans collectively evaluated for impairment	136,410	86,934
Total loans	136,410	86,934
Non-acquired loans | Other Loans
Allowance for loan losses:
Balance at the beginning of the period	217	125
Provision	(8)	92
Balance at the end of the period	209	217
Loans collectively evaluated for impairment	209	217
Loans:
Loans collectively evaluated for impairment	33,834	33,163
Total loans	$ 33,834	$ 33,163