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Loans and Asset Quality Information (Schedule of Activity in Allowance for Loan Losses for Loans) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Provisions |  | $ (1,414) | $ (23) | $ (737) |
Loans receivable: |  |  |  |  |
Ending balance - total | 2,651,261 | 2,480,938 | 2,651,261 | 2,480,938 | $ 2,518,053
Unamortized net deferred loan costs | 198 | 765 | 198 | 765 | 873
Total non-covered loans | 2,651,459 | 2,375,094 | 2,651,459 | 2,375,094 | 2,416,285
Covered [Member] |  |  |  |  |
Beginning balance | 1,074 | 1,935 | 1,799 | 2,281 | 2,281
Charge-offs |  | (84) | (244) | (1,200) | (1,316)
Recoveries |  | 1,730 | 1,958 | 2,928 | 3,622
Transfers from covered category | (1,074) |  | (1,381) |  |
Removed due to branch loan sale |  |  |  |  |
Provisions |  | (1,681) | (2,132) | (2,109) | (2,788)
Ending balance |  | 1,900 |  | 1,900 | 1,799
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  | 466 |  | 466 | 554
Collectively evaluated for impairment |  | 1,391 |  | 1,391 | 1,175
Loans acquired with deteriorated credit quality |  | 43 |  | 43 | 70
Loans receivable: |  |  |  |  |
Ending balance - total |  | 106,609 |  | 106,609 | 102,641
Unamortized net deferred loan costs |  |  |  |  |
Total non-covered loans |  | 106,609 |  | 106,609 | 102,641
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment |  | 5,167 |  | 5,167 |
Collectively evaluated for impairment |  | 99,892 |  | 99,892 |
Loans acquired with deteriorated credit quality |  | 1,520 |  | 1,520 |
Non-covered [Member] |  |  |  |  |
Beginning balance | 26,023 | 30,155 | 28,583 | 38,345 | 38,345
Charge-offs | (2,055) | (3,644) | (8,015) | (14,407) | (17,115)
Recoveries | 1,658 | 1,377 | 5,081 | 2,845 | 3,546
Transfers from covered category |  |  |  |  |
Removed due to branch loan sale | (1,051) |  | (1,051) |  |
Provisions |  | 267 | (23) | 1,372 | 2,008
Ending balance | 24,575 | 28,155 | 24,575 | 28,155 | 28,583
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 1,933 | 2,409 | 1,933 | 2,409 | 2,687
Collectively evaluated for impairment | 22,636 | 25,746 | 22,636 | 25,746 | 24,097
Loans acquired with deteriorated credit quality | 6 |  | 6 |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 2,651,261 | 2,374,329 | 2,651,261 | 2,374,329 | 2,415,412
Unamortized net deferred loan costs | 198 | 765 | 198 | 765 | 873
Total non-covered loans | 2,651,261 | 2,375,094 | 2,651,261 | 2,375,094 | 2,518,053
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 39,126 | 45,925 | 39,126 | 45,925 | 44,654
Collectively evaluated for impairment | 2,611,391 | 2,327,807 | 2,611,391 | 2,327,807 | 2,370,177
Loans acquired with deteriorated credit quality | 744 | 597 | 744 | 597 | 581
Unallocated [Member] |  |  |  |  |
Beginning balance | 572 | 1,096 | 696 | 147 | 147
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Transfers from covered category | 1 |  | 1 |  |
Removed due to branch loan sale | (1) |  | (1) |  |
Provisions | 498 | 316 | 374 | 1,265 | 549
Ending balance | 1,070 | 1,412 | 1,070 | 1,412 | 696
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment | 1,070 | 1,412 | 1,070 | 1,412 | 696
Loans acquired with deteriorated credit quality |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total |  |  |  |  |
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Loans acquired with deteriorated credit quality |  |  |  |  |
Unallocated [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total |  |  |  |  |
Real estate mortgage residential (1-4 family) first mortgages [Member] |  |  |  |  |
Beginning balance | 7,860 | 8,082 | 7,832 | 10,136 | 10,136
Charge-offs | (692) | (1,692) | (3,383) | (3,949) | (4,904)
Recoveries | 377 | 82 | 672 | 241 | 279
Transfers from covered category | 788 |  | 839 |  |
Removed due to branch loan sale | (347) |  | (347) |  |
Provisions | (492) | 1,275 | 1,881 | 1,319 | 2,321
Ending balance | 7,494 | 7,747 | 7,494 | 7,747 | 7,832
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 1,306 | 1,502 | 1,306 | 1,502 | 1,440
Collectively evaluated for impairment | 6,188 | 6,245 | 6,188 | 6,245 | 6,392
Loans acquired with deteriorated credit quality | 6 |  | 6 |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 756,880 | 692,431 | 756,880 | 692,431 | 692,902
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 21,611 | 20,857 | 21,611 | 20,857 | 21,325
Collectively evaluated for impairment | 735,062 | 671,574 | 735,062 | 671,574 | 671,577
Loans acquired with deteriorated credit quality | 207 |  | 207 |  |
Real estate mortgage residential (1-4 family) first mortgages [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 756,880 | 851,372 | 756,880 | 851,372 | 692,902
Commercial, financial, and agricultural [Member] |  |  |  |  |
Beginning balance | 4,282 | 5,387 | 4,742 | 6,769 | 6,769
Charge-offs | (495) | (473) | (1,229) | (2,774) | (2,908)
Recoveries | 252 | 354 | 554 | 697 | 831
Transfers from covered category |  |  | 56 |  |
Removed due to branch loan sale | (263) |  | (263) |  |
Provisions | 755 | (187) | 671 | 389 | 50
Ending balance | 4,531 | 5,081 | 4,531 | 5,081 | 4,742
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 9 | 93 | 9 | 93 | 304
Collectively evaluated for impairment | 4,522 | 4,988 | 4,522 | 4,988 | 4,438
Loans acquired with deteriorated credit quality |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 248,877 | 198,624 | 248,877 | 198,624 | 202,671
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 1,732 | 909 | 1,732 | 909 | 992
Collectively evaluated for impairment | 247,145 | 197,715 | 247,145 | 197,715 | 200,806
Loans acquired with deteriorated credit quality |  |  |  |  |
Commercial, financial, and agricultural [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 248,877 | 202,243 | 248,877 | 202,243 | 201,798
Real estate - construction, land development & other land loans [Member] |  |  |  |  |
Beginning balance | 2,899 | 5,427 | 3,754 | 8,158 | 8,158
Charge-offs | (161) | (642) | (638) | (2,650) | (3,034)
Recoveries | 588 | 626 | 799 | 944 | 998
Transfers from covered category | 3 |  | 65 |  |
Removed due to branch loan sale | (39) |  | (39) |  |
Provisions | (612) | (1,088) | (1,263) | (2,129) | (2,368)
Ending balance | 2,678 | 4,323 | 2,678 | 4,323 | 3,754
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 169 | 270 | 169 | 270 | 241
Collectively evaluated for impairment | 2,509 | 4,053 | 2,509 | 4,053 | 3,513
Loans acquired with deteriorated credit quality |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 327,863 | 294,426 | 327,863 | 294,426 | 308,969
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 4,181 | 5,126 | 4,181 | 5,126 | 4,898
Collectively evaluated for impairment | 323,682 | 270,719 | 323,682 | 270,719 | 300,330
Loans acquired with deteriorated credit quality |  |  |  |  |
Real estate - construction, land development & other land loans [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 327,863 | 275,404 | 327,863 | 275,404 | 305,228
Real estate mortgage home equity loans / lines of credit [Member] |  |  |  |  |
Beginning balance | 2,285 | 3,383 | 2,893 | 4,753 | 4,753
Charge-offs | (196) | (129) | (930) | (726) | (1,054)
Recoveries | 69 | 47 | 188 | 105 | 121
Transfers from covered category | 281 |  | 293 |  |
Removed due to branch loan sale | (110) |  | (110) |  |
Provisions | 54 | (498) | 49 | (1,329) | (927)
Ending balance | 2,383 | 2,803 | 2,383 | 2,803 | 2,893
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 5 | 46 | 5 | 46 | 321
Collectively evaluated for impairment | 2,372 | 2,757 | 2,372 | 2,757 | 2,572
Loans acquired with deteriorated credit quality |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 239,049 | 213,435 | 239,049 | 213,435 | 221,995
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 310 | 435 | 310 | 435 | 758
Collectively evaluated for impairment | 238,733 | 213,000 | 238,733 | 213,000 | 221,237
Loans acquired with deteriorated credit quality | 6 |  | 6 |  |
Real estate mortgage home equity loans / lines of credit [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 239,049 | 202,618 | 239,049 | 202,618 | 221,995
Real estate mortgage commercial and other [Member] |  |  |  |  |
Beginning balance | 5,571 | 5,664 | 5,816 | 6,466 | 6,466
Charge-offs | (288) | (289) | (850) | (2,311) | (2,804)
Recoveries | 317 | 150 | 602 | 545 | 904
Transfers from covered category | 1 |  | 127 |  |
Removed due to branch loan sale | (228) |  | (228) |  |
Provisions | (165) | 226 | (259) | 1,051 | 1,250
Ending balance | 5,208 | 5,751 | 5,208 | 5,751 | 5,816
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment | 444 | 456 | 444 | 456 | 336
Collectively evaluated for impairment | 4,764 | 5,295 | 4,764 | 5,295 | 5,480
Loans acquired with deteriorated credit quality |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 1,026,328 | 944,432 | 1,026,328 | 944,432 | 957,587
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 11,291 | 18,521 | 11,291 | 18,521 | 16,605
Collectively evaluated for impairment | 1,014,506 | 913,136 | 1,014,506 | 913,136 | 928,637
Loans acquired with deteriorated credit quality | 531 | 597 | 531 | 597 | 581
Real estate mortgage commercial and other [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 1,026,328 | 799,191 | 1,026,328 | 799,191 | 945,823
Installment loans to individuals [Member] |  |  |  |  |
Beginning balance | 1,480 | 1,116 | 1,051 | 1,916 | 1,916
Charge-offs | (223) | (419) | (741) | (1,997) | (2,411)
Recoveries | 55 | 118 | 308 | 313 | 413
Transfers from covered category |  |  |  |  |
Removed due to branch loan sale | (63) |  | (63) |  |
Provisions | (38) | 223 | 656 | 806 | 1,133
Ending balance | 1,211 | 1,038 | 1,211 | 1,038 | 1,051
Ending balances: Allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  | 42 |  | 42 | 45
Collectively evaluated for impairment | 1,211 | 996 | 1,211 | 996 | 1,006
Loans acquired with deteriorated credit quality |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | 52,264 | 47,120 | 52,264 | 47,120 | 47,666
Ending balances: Loans |  |  |  |  |
Individually evaluated for impairment | 1 | 77 | 1 | 77 | 76
Collectively evaluated for impairment | 52,263 | 47,043 | 52,263 | 47,043 | 47,590
Loans acquired with deteriorated credit quality |  |  |  |  |
Installment loans to individuals [Member] | Non-covered [Member] |  |  |  |  |
Loans receivable: |  |  |  |  |
Ending balance - total | $ 52,264 | $ 43,501 | $ 52,264 | $ 43,501 | $ 47,666

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