Loans (Summary of Recorded Investment of Commercial Loans by Risk Rating Categories) (Details) (USD $) | Jun. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2013 |
In Thousands, unless otherwise specified |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | $2,622,872 | $2,518,826 | $2,364,870 |
Commercial [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 1,212,383 | 1,176,307 | 1,091,894 |
Real estate commercial [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 1,298,365 | 1,232,658 | 1,172,347 |
Real estate construction [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 101,168 | 89,795 | 73,448 |
Land development [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 10,956 | 20,066 | 27,181 |
Originated Portfolio [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 2,388,303 | 2,268,619 | 2,070,290 |
Originated Portfolio [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 2,218,823 | 2,098,995 | 1,886,835 |
Originated Portfolio [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 47,143 | 55,953 | 70,990 |
Originated Portfolio [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 75,859 | 64,019 | 69,298 |
Originated Portfolio [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 46,251 | 48,674 | 41,358 |
Originated Portfolio [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 227 | 978 | 1,809 |
Originated Portfolio [Member] | Commercial [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 1,138,523 | 1,092,693 | 986,910 |
Originated Portfolio [Member] | Commercial [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 1,067,000 | 1,024,461 | 919,985 |
Originated Portfolio [Member] | Commercial [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 15,459 | 20,082 | 26,848 |
Originated Portfolio [Member] | Commercial [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 37,291 | 29,776 | 29,025 |
Originated Portfolio [Member] | Commercial [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 18,560 | 17,414 | 9,693 |
Originated Portfolio [Member] | Commercial [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 213 | 960 | 1,359 |
Originated Portfolio [Member] | Real estate commercial [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 1,154,915 | 1,085,187 | 1,003,572 |
Originated Portfolio [Member] | Real estate commercial [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 1,063,555 | 991,964 | 897,960 |
Originated Portfolio [Member] | Real estate commercial [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 30,053 | 34,248 | 43,650 |
Originated Portfolio [Member] | Real estate commercial [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 35,946 | 30,377 | 33,464 |
Originated Portfolio [Member] | Real estate commercial [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 25,347 | 28,580 | 28,048 |
Originated Portfolio [Member] | Real estate commercial [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 14 | 18 | 450 |
Originated Portfolio [Member] | Real estate construction [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 88,575 | 77,459 | 60,874 |
Originated Portfolio [Member] | Real estate construction [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 85,754 | 75,696 | 59,575 |
Originated Portfolio [Member] | Real estate construction [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 666 | 654 | 58 |
Originated Portfolio [Member] | Real estate construction [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 1,995 | 738 | 1,058 |
Originated Portfolio [Member] | Real estate construction [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 160 | 371 | 183 |
Originated Portfolio [Member] | Real estate construction [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Originated Portfolio [Member] | Land development [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 6,290 | 13,280 | 18,934 |
Originated Portfolio [Member] | Land development [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 2,514 | 6,874 | 9,315 |
Originated Portfolio [Member] | Land development [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 965 | 969 | 434 |
Originated Portfolio [Member] | Land development [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 627 | 3,128 | 5,751 |
Originated Portfolio [Member] | Land development [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 2,184 | 2,309 | 3,434 |
Originated Portfolio [Member] | Land development [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 234,569 | 250,207 | 294,580 |
Acquired Portfolio [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 208,030 | 224,419 | 271,403 |
Acquired Portfolio [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 10,591 | 10,494 | 8,011 |
Acquired Portfolio [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 10,070 | 8,644 | 9,419 |
Acquired Portfolio [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 5,878 | 6,650 | 5,747 |
Acquired Portfolio [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | Commercial [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 73,860 | 83,614 | 104,984 |
Acquired Portfolio [Member] | Commercial [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 59,993 | 73,763 | 100,241 |
Acquired Portfolio [Member] | Commercial [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 6,769 | 5,472 | 2,315 |
Acquired Portfolio [Member] | Commercial [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 3,197 | 852 | 699 |
Acquired Portfolio [Member] | Commercial [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 3,901 | 3,527 | 1,729 |
Acquired Portfolio [Member] | Commercial [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | Real estate commercial [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 143,450 | 147,471 | 168,775 |
Acquired Portfolio [Member] | Real estate commercial [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 132,898 | 133,653 | 152,906 |
Acquired Portfolio [Member] | Real estate commercial [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 3,822 | 5,022 | 5,696 |
Acquired Portfolio [Member] | Real estate commercial [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 6,730 | 7,792 | 8,720 |
Acquired Portfolio [Member] | Real estate commercial [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 1,004 | 1,453 |
Acquired Portfolio [Member] | Real estate commercial [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | Real estate construction [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 12,593 | 12,336 | 12,574 |
Acquired Portfolio [Member] | Real estate construction [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 12,593 | 12,336 | 12,574 |
Acquired Portfolio [Member] | Real estate construction [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | Real estate construction [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | Real estate construction [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | Real estate construction [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | Land development [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 4,666 | 6,786 | 8,247 |
Acquired Portfolio [Member] | Land development [Member] | Risk Grades 1-5 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 2,546 | 4,667 | 5,682 |
Acquired Portfolio [Member] | Land development [Member] | Risk Grade 6 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 0 | 0 | 0 |
Acquired Portfolio [Member] | Land development [Member] | Risk Grade 7 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 143 | 0 | 0 |
Acquired Portfolio [Member] | Land development [Member] | Risk Grade 8 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | 1,977 | 2,119 | 2,565 |
Acquired Portfolio [Member] | Land development [Member] | Risk Grade 9 [Member] | ' | ' | ' |
Recorded investment of loans in commercial loan portfolio by risk rating categories | ' | ' | ' |
Recorded investment (loan balance), Commercial, Total | $0 | $0 | $0 |