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Loans and Asset Quality Information (Schedule of Activity in Allowance for Loan Losses for Non-Covered Loans) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Provisions | $ (1,414) | $ 1,485 | $ (737) | $ 8,719 |
Loans receivable: |  |  |  |  |
Ending balance - total | 2,480,938 | 2,425,360 | 2,480,938 | 2,425,360 | $ 2,395,228
Unamortized net deferred loan costs | 765 | 730 | 765 | 730 | 946
Total non-covered loans | 2,375,094 | 2,292,841 | 2,375,094 | 2,292,841 | 2,268,580
Non-covered [Member] |  |  |  |  |
Beginning balance | 30,155 | 41,966 | 38,345 | 44,263 | 44,263
Charge-offs | (3,644) | (3,750) | (14,407) | (11,472) | (16,288)
Recoveries | 1,377 | 332 | 2,845 | 1,234 | 1,546
Transfers from covered category |  | 1,737 |  | 1,737 | 1,737
Provisions | 267 | 1,279 | 1,372 | 5,802 | 7,087
Ending balance | 28,155 | 41,564 | 28,155 | 41,564 | 38,345
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 2,409 | 2,914 | 2,409 | 2,914 | 2,477
Collectively evaluated for impairment | 25,746 | 38,650 | 25,746 | 38,650 | 35,868
Loans receivable: |  |  |  |  |
Ending balance - total | 2,374,329 | 2,292,111 | 2,374,329 | 2,292,111 | 2,267,634
Unamortized net deferred loan costs | 765 | 730 | 765 | 730 | 946
Total non-covered loans | 2,375,094 | 2,292,841 | 2,375,094 | 2,292,841 | 2,268,580
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 45,925 | 54,461 | 45,925 | 54,461 | 53,531
Collectively evaluated for impairment | $ 2,327,807 | $ 2,236,986 | $ 2,327,807 | $ 2,236,986 | $ 2,213,456
Non-covered [Member] | Receivables acquired with deteriorated credit quality [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Ending balance |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Loans acquired with deteriorated credit quality | $ 597 | $ 664 | $ 597 | $ 664 | $ 647
Total Non Covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Total non-covered loans | 2,374,329 |  | 2,374,329 |  | 2,267,634
Commercial, financial and agricultural [Member] |  |  |  |  |
Beginning balance | 5,564 | 8,948 | 8,391 | 7,432 | 7,432
Charge-offs | (523) | (840) | (3,550) | (3,506) | (4,039)
Recoveries | 387 | 32 | 735 | 81 | 140
Transfers from covered category |  | 36 |  | 36 | 36
Provisions | (185) | 1,185 | (333) | 5,318 | 4,822
Ending balance | 5,243 | 9,361 | 5,243 | 9,361 | 8,391
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 135 | 381 | 135 | 381 | 211
Collectively evaluated for impairment | 5,108 | 8,980 | 5,108 | 8,980 | 8,180
Loans receivable: |  |  |  |  |
Ending balance - total | 199,630 | 165,215 | 199,630 | 165,215 | 160,878
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 986 | 972 | 986 | 972 | 784
Collectively evaluated for impairment | $ 201,257 | $ 169,676 | $ 201,257 | $ 169,676 | $ 165,944
Commercial, financial and agricultural [Member] | Receivables acquired with deteriorated credit quality [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Ending balance |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Loans acquired with deteriorated credit quality |  |  |  |  |
Commercial, financial and agricultural [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | $ 202,243 | $ 170,648 | $ 202,243 | $ 170,648 | $ 166,728
Real Estate construction, land development and other land loans [Member] |  |  |  |  |
Beginning balance | 5,016 | 7,414 | 6,470 | 12,966 | 12,966
Charge-offs | (574) | (470) | (2,532) | (1,704) | (2,148)
Recoveries | 625 | 40 | 942 | 349 | 398
Transfers from covered category |  | 813 |  | 813 | 813
Provisions | (1,105) | (574) | (918) | (5,201) | (5,559)
Ending balance | 3,962 | 7,223 | 3,962 | 7,223 | 6,470
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 250 | 513 | 250 | 513 | 415
Collectively evaluated for impairment | 3,712 | 6,710 | 3,712 | 6,710 | 6,055
Loans receivable: |  |  |  |  |
Ending balance - total | 294,426 | 298,091 | 294,426 | 298,091 | 288,148
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 4,685 | 8,613 | 4,685 | 8,613 | 7,991
Collectively evaluated for impairment | $ 270,719 | $ 257,806 | $ 270,719 | $ 257,806 | $ 249,524
Real Estate construction, land development and other land loans [Member] | Receivables acquired with deteriorated credit quality [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Ending balance |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Loans acquired with deteriorated credit quality |  |  |  |  |
Real Estate construction, land development and other land loans [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | $ 275,404 | $ 266,419 | $ 275,404 | $ 266,419 | $ 257,515
Real estate residential, farmland and mutli-family [Member] |  |  |  |  |
Beginning balance | 9,641 | 11,132 | 9,720 | 15,142 | 15,142
Charge-offs | (1,949) | (874) | (4,362) | (2,505) | (4,417)
Recoveries | 98 | 111 | 270 | 290 | 331
Transfers from covered category |  | 51 |  | 51 | 51
Provisions | 1,341 | (194) | 3,503 | (2,752) | (1,387)
Ending balance | 9,131 | 10,226 | 9,131 | 10,226 | 9,720
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 1,575 | 1,771 | 1,575 | 1,771 | 1,686
Collectively evaluated for impairment | 7,556 | 8,455 | 7,556 | 8,455 | 8,034
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 23,599 | 24,233 | 23,599 | 24,233 | 20,263
Collectively evaluated for impairment | $ 827,773 | $ 835,985 | $ 827,773 | $ 835,985 | $ 733,875
Real estate residential, farmland and mutli-family [Member] | Receivables acquired with deteriorated credit quality [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Ending balance |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Loans acquired with deteriorated credit quality |  |  |  |  |
Real estate residential, farmland and mutli-family [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | $ 851,372 | $ 860,218 | $ 851,372 | $ 860,218 | $ 846,833
Total non-covered loans | 851,372 |  | 851,372 |  | 846,833
Real estate home equity lines of credit [Member] |  |  |  |  |
Beginning balance | 3,167 | 3,755 | 3,731 | 1,838 | 1,838
Charge-offs | (31) | (116) | (594) | (619) | (912)
Recoveries | 43 | $ 7 | 88 | $ 18 | $ 45
Transfers from covered category |  |  |  |  |
Provisions | (565) | $ 49 | (611) | $ 2,458 | $ 2,760
Ending balance | $ 2,614 | $ 3,695 | $ 2,614 | $ 3,695 | $ 3,731
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment | $ 2,614 | $ 3,695 | $ 2,614 | $ 3,695 | $ 3,731
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment |  | 481 |  | 481 | 476
Collectively evaluated for impairment | $ 202,618 | $ 198,496 | $ 202,618 | $ 198,496 | $ 198,101
Real estate home equity lines of credit [Member] | Receivables acquired with deteriorated credit quality [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Ending balance |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Loans acquired with deteriorated credit quality |  |  |  |  |
Real estate home equity lines of credit [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | $ 202,618 | $ 198,977 | $ 202,618 | $ 198,977 | $ 198,577
Total non-covered loans | 202,618 |  | 202,618 |  | 198,577
Real estate mortgage commercial and other [Member] |  |  |  |  |
Beginning balance | 4,723 | 9,212 | 9,045 | 5,524 | 5,524
Charge-offs | (198) | (987) | (2,147) | (1,876) | (3,048)
Recoveries | 140 | 14 | 535 | 135 | 181
Transfers from covered category |  | 833 |  | 833 | 833
Provisions | 249 | 971 | (2,519) | 5,427 | 5,555
Ending balance | 4,914 | 10,043 | 4,914 | 10,043 | 9,045
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 449 | 229 | 449 | 229 | 165
Collectively evaluated for impairment | 4,465 | 9,814 | 4,465 | 9,814 | 8,880
Loans receivable: |  |  |  |  |
Ending balance - total | 944,432 | 879,122 | 944,432 | 879,122 | 882,127
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 16,655 | 20,128 | 16,655 | 20,128 | 20,263
Collectively evaluated for impairment | $ 781,939 | $ 731,316 | $ 781,939 | $ 731,316 | $ 733,875
Real estate mortgage commercial and other [Member] | Receivables acquired with deteriorated credit quality [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Ending balance |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Loans acquired with deteriorated credit quality | $ 597 | $ 664 | $ 597 | $ 664 | $ 647
Real estate mortgage commercial and other [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 799,191 | 752,108 | 799,191 | 752,108 | 754,785
Consumer [Member] |  |  |  |  |
Beginning balance | 948 | 906 | 841 | 1,513 | 1,513
Charge-offs | (369) | (463) | (1,222) | (1,262) | (1,724)
Recoveries | 84 | 128 | 275 | 361 | 451
Transfers from covered category |  | 4 |  | 4 | 4
Provisions | 216 | 343 | 985 | 302 | 597
Ending balance | $ 879 | 918 | $ 879 | 918 | $ 841
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  | 20 |  | 20 |
Collectively evaluated for impairment | $ 879 | 898 | $ 879 | 898 | $ 841
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment |  | 34 |  | 34 | 7
Collectively evaluated for impairment | $ 43,501 | $ 43,707 | $ 43,501 | $ 43,707 | $ 43,189
Consumer [Member] | Receivables acquired with deteriorated credit quality [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Ending balance |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Loans acquired with deteriorated credit quality |  |  |  |  |
Consumer [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | $ 43,501 | $ 43,741 | $ 43,501 | $ 43,741 | $ 43,196
Total non-covered loans | 43,501 |  | 43,501 |  | 43,196
Unallocated [Member] |  |  |  |  |
Beginning balance | $ 1,096 | $ 599 | $ 147 | $ (152) | $ (152)
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Transfers from covered category |  |  |  |  |
Provisions | $ 316 | $ (501) | $ 1,265 | $ 250 | $ 299
Ending balance | $ 1,412 | $ 98 | $ 1,412 | $ 98 | $ 147
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment | $ 1,412 | $ 98 | $ 1,412 | $ 98 | $ 147
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Unallocated [Member] | Receivables acquired with deteriorated credit quality [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Ending balance |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Loans acquired with deteriorated credit quality |  |  |  |  |
Unallocated [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total |  |  |  |  |

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