Loans and Allowance for Loan Losses (Details 9) (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
Total acquired loans	1,598,051	73,215
Non-credit impaired | Construction & development
Loans and Allowance for Loan Losses
Total acquired loans	58,396	839
Non-credit impaired | Construction & development | Pass
Loans and Allowance for Loan Losses
Total acquired loans	57,389	796
Non-credit impaired | Construction & development | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	109
Non-credit impaired | Construction & development | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	898	43
Non-credit impaired | Commercial Non-owner Occupied
Loans and Allowance for Loan Losses
Total acquired loans	58,598	2,877
Non-credit impaired | Commercial Non-owner Occupied | Pass
Loans and Allowance for Loan Losses
Total acquired loans	56,539	2,877
Non-credit impaired | Commercial Non-owner Occupied | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	1,565
Non-credit impaired | Commercial Non-owner Occupied | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	494
Non-credit impaired | Commercial Owner Occupied
Loans and Allowance for Loan Losses
Total acquired loans	73,714	12,141
Non-credit impaired | Commercial Owner Occupied | Pass
Loans and Allowance for Loan Losses
Total acquired loans	71,984	11,977
Non-credit impaired | Commercial Owner Occupied | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	318	164
Non-credit impaired | Commercial Owner Occupied | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	1,412
Non-credit impaired | Commercial & Industrial
Loans and Allowance for Loan Losses
Total acquired loans	58,773	17,531
Non-credit impaired | Commercial & Industrial | Pass
Loans and Allowance for Loan Losses
Total acquired loans	56,777	17,515
Non-credit impaired | Commercial & Industrial | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	924
Non-credit impaired | Commercial & Industrial | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	1,072	16
Non-credit impaired | Other Income Producing Property
Loans and Allowance for Loan Losses
Total acquired loans	74,566	3,688
Non-credit impaired | Other Income Producing Property | Pass
Loans and Allowance for Loan Losses
Total acquired loans	70,812	3,352
Non-credit impaired | Other Income Producing Property | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	2,177	244
Non-credit impaired | Other Income Producing Property | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	1,577	92
Non-credit impaired | Consumer Owner Occupied
Loans and Allowance for Loan Losses
Total acquired loans	742,597
Non-credit impaired | Consumer Owner Occupied | Pass
Loans and Allowance for Loan Losses
Total acquired loans	739,894
Non-credit impaired | Consumer Owner Occupied | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	417
Non-credit impaired | Consumer Owner Occupied | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	2,286
Non-credit impaired | Home Equity
Loans and Allowance for Loan Losses
Total acquired loans	264,150	36,139
Non-credit impaired | Home Equity | Pass
Loans and Allowance for Loan Losses
Total acquired loans	246,274	34,656
Non-credit impaired | Home Equity | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	6,733	167
Non-credit impaired | Home Equity | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	11,143	1,316
Non-credit impaired | Consumer
Loans and Allowance for Loan Losses
Total acquired loans	267,257
Non-credit impaired | Consumer | Pass
Loans and Allowance for Loan Losses
Total acquired loans	266,645
Non-credit impaired | Consumer | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	127
Non-credit impaired | Consumer | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	485
Credit impaired
Loans and Allowance for Loan Losses
Total acquired loans	1,227,698	986,613
Credit impaired | Construction & development
Loans and Allowance for Loan Losses
Total acquired loans	114,126	130,451
Credit impaired | Construction & development | Pass
Loans and Allowance for Loan Losses
Total acquired loans	38,748	87,142
Credit impaired | Construction & development | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	13,762	7,742
Credit impaired | Construction & development | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	61,616	34,754
Credit impaired | Construction & development | Doubtful
Loans and Allowance for Loan Losses
Total acquired loans		813
Credit impaired | Commercial & Industrial
Loans and Allowance for Loan Losses
Total acquired loans	68,862	72,718
Credit impaired | Commercial & Industrial | Pass
Loans and Allowance for Loan Losses
Total acquired loans	38,450	54,013
Credit impaired | Commercial & Industrial | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	3,968	5,282
Credit impaired | Commercial & Industrial | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	26,444	13,393
Credit impaired | Commercial & Industrial | Doubtful
Loans and Allowance for Loan Losses
Total acquired loans		30
Credit impaired | Consumer
Loans and Allowance for Loan Losses
Total acquired loans	103,998	15,685
Credit impaired | Consumer | Pass
Loans and Allowance for Loan Losses
Total acquired loans	8,804	12,927
Credit impaired | Consumer | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	38,322	783
Credit impaired | Consumer | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	56,872	1,974
Credit impaired | Consumer | Doubtful
Loans and Allowance for Loan Losses
Total acquired loans		1
Credit impaired | Commercial Loans Greater Than or Equal to $1 Million-CBT
Loans and Allowance for Loan Losses
Total acquired loans	24,109	39,661
Credit impaired | Commercial Loans Greater Than or Equal to $1 Million-CBT | Pass
Loans and Allowance for Loan Losses
Total acquired loans	12,047	13,384
Credit impaired | Commercial Loans Greater Than or Equal to $1 Million-CBT | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	2,513	3,098
Credit impaired | Commercial Loans Greater Than or Equal to $1 Million-CBT | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	9,549	23,179
Credit impaired | Commercial Real Estate
Loans and Allowance for Loan Losses
Total acquired loans	439,785	372,924
Credit impaired | Commercial Real Estate | Pass
Loans and Allowance for Loan Losses
Total acquired loans	244,293	297,408
Credit impaired | Commercial Real Estate | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	46,159	22,279
Credit impaired | Commercial Real Estate | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	149,333	53,072
Credit impaired | Commercial Real Estate | Doubtful
Loans and Allowance for Loan Losses
Total acquired loans		165
Credit impaired | Residential real estate
Loans and Allowance for Loan Losses
Total acquired loans	476,689	354,718
Credit impaired | Residential real estate | Pass
Loans and Allowance for Loan Losses
Total acquired loans	198,738	254,837
Credit impaired | Residential real estate | Special mention
Loans and Allowance for Loan Losses
Total acquired loans	91,468	38,211
Credit impaired | Residential real estate | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	186,405	61,644
Credit impaired | Residential real estate | Doubtful
Loans and Allowance for Loan Losses
Total acquired loans	78	26
Credit impaired | Single pay
Loans and Allowance for Loan Losses
Total acquired loans	129	456
Credit impaired | Single pay | Pass
Loans and Allowance for Loan Losses
Total acquired loans	52	58
Credit impaired | Single pay | Special mention
Loans and Allowance for Loan Losses
Total acquired loans		52
Credit impaired | Single pay | Substandard
Loans and Allowance for Loan Losses
Total acquired loans	$ 77	$ 346