Loans and Allowance for Loan Losses (Details 11) (Acquired loans, USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Loans and Allowance for Loan Losses
Total acquired loans	$ 1,227,698	$ 986,613
Non-credit impaired
Loans and Allowance for Loan Losses
30-59 Days Past Due	6,250	388
60-89 Days Past Due	1,638	111
90+ Days Past Due	3,010	148
Total Past Due	10,898	647
Current	1,587,153	72,568
Total acquired loans	1,598,051	73,215
Non-credit impaired | Construction and land development
Loans and Allowance for Loan Losses
30-59 Days Past Due	371
90+ Days Past Due	464	43
Total Past Due	835	43
Current	57,561	796
Total acquired loans	58,396	839
Non-credit impaired | Commercial non-owner occupied
Loans and Allowance for Loan Losses
30-59 Days Past Due	105
90+ Days Past Due	17
Total Past Due	122
Current	58,476	2,877
Total acquired loans	58,598	2,877
Non-credit impaired | Commercial owner occupied
Loans and Allowance for Loan Losses
60-89 Days Past Due	71
90+ Days Past Due	272
Total Past Due	343
Current	73,371	12,141
Total acquired loans	73,714	12,141
Non-credit impaired | Consumer owner occupied
Loans and Allowance for Loan Losses
30-59 Days Past Due	3,368
60-89 Days Past Due	393
90+ Days Past Due	1,196
Total Past Due	4,957
Current	737,640
Total acquired loans	742,597
Non-credit impaired | Home equity loans
Loans and Allowance for Loan Losses
30-59 Days Past Due	857	242
60-89 Days Past Due	67	111
90+ Days Past Due	625	105
Total Past Due	1,549	458
Current	262,601	35,681
Total acquired loans	264,150	36,139
Non-credit impaired | Commercial and industrial
Loans and Allowance for Loan Losses
30-59 Days Past Due	827	11
60-89 Days Past Due	894
90+ Days Past Due	282
Total Past Due	2,003	11
Current	56,770	17,520
Total acquired loans	58,773	17,531
Non-credit impaired | Other income producing property
Loans and Allowance for Loan Losses
30-59 Days Past Due	431	135
Total Past Due	431	135
Current	74,135	3,553
Total acquired loans	74,566	3,688
Non-credit impaired | Consumer
Loans and Allowance for Loan Losses
30-59 Days Past Due	291
60-89 Days Past Due	213
90+ Days Past Due	154
Total Past Due	658
Current	266,599
Total acquired loans	267,257
Non-credit impaired | Commercial Real Estate
Loans and Allowance for Loan Losses
Total acquired loans	1,006,747	36,139
Credit impaired
Loans and Allowance for Loan Losses
30-59 Days Past Due	29,399	18,812
60-89 Days Past Due	17,872	10,262
90+ Days Past Due	82,132	76,034
Total Past Due	129,403	105,108
Current	1,098,295	881,505
Total acquired loans	1,227,698	986,613
Credit impaired | Construction and land development
Loans and Allowance for Loan Losses
30-59 Days Past Due	4,847	2,976
60-89 Days Past Due	9,166	1,573
90+ Days Past Due	17,567	18,718
Total Past Due	31,580	23,267
Current	82,546	107,184
Total acquired loans	114,126	130,451
Credit impaired | Commercial and industrial
Loans and Allowance for Loan Losses
30-59 Days Past Due	3,875	1,255
60-89 Days Past Due	634	285
90+ Days Past Due	3,829	5,069
Total Past Due	8,338	6,609
Current	60,524	66,109
Total acquired loans	68,862	72,718
Credit impaired | Consumer
Loans and Allowance for Loan Losses
30-59 Days Past Due	2,390	181
60-89 Days Past Due	552	76
90+ Days Past Due	2,050	736
Total Past Due	4,992	993
Current	99,006	14,692
Total acquired loans	103,998	15,685
Credit impaired | Commercial Loans Greater Than or Equal to $1 Million-CBT
Loans and Allowance for Loan Losses
30-59 Days Past Due		923
60-89 Days Past Due		993
90+ Days Past Due	7,217	15,810
Total Past Due	7,217	17,726
Current	16,892	21,935
Total acquired loans	24,109	39,661
Credit impaired | Commercial Real Estate
Loans and Allowance for Loan Losses
30-59 Days Past Due	4,493	5,866
60-89 Days Past Due	3,728	2,306
90+ Days Past Due	24,362	17,488
Total Past Due	32,583	25,660
Current	407,202	347,264
Total acquired loans	439,785	372,924
Credit impaired | Residential real estate
Loans and Allowance for Loan Losses
30-59 Days Past Due	13,794	7,610
60-89 Days Past Due	3,792	4,828
90+ Days Past Due	27,061	18,151
Total Past Due	44,647	30,589
Current	432,042	324,129
Total acquired loans	476,689	354,718
Credit impaired | Single pay
Loans and Allowance for Loan Losses
30-59 Days Past Due		1
60-89 Days Past Due		201
90+ Days Past Due	46	62
Total Past Due	46	264
Current	83	192
Total acquired loans	$ 129	$ 456