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Allowance for Loan and Lease Losses (Schedule of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2013
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | $ 30,177 | [1] | $ 30,900 | [1]
With an Allowance Recorded Recorded Investment | 30,043 | [2] | 30,665 | [2]
With an Allowance Recorded Related Allowance | 5,181 |  | 5,349 |
With an Allowance Recorded Average Recorded Investment | 32,998 |  | 31,260 |
With an Allowance Recorded Interest Income Recognized | 731 | [3] | 1,047 | [3]
With no Related Allowance Recorded Unpaid Principal Balance | 11,752 | [1] | 29,026 | [1]
With no Related Allowance Recorded Recorded Investment | 10,391 | [2] | 25,722 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment | 12,494 |  | 27,264 |
With no Related Allowance Recorded Interest Income Recognized | 89 | [3] | 173 | [3]
Individually impaired loans Unpaid Principal Balance | 41,929 | [1] | 59,926 | [1]
Individually impaired loans Recorded Investment | 40,434 | [2] | 56,387 | [2]
Individually impaired loans Related Allowance | 5,181 |  | 5,349 |
Individually impaired loans Average Recorded Investment | 45,492 |  | 58,524 |
Individually impaired loans Interest Income Recognized | 820 | [3] | 1,220 | [3]
Agricultural [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 127 | [1] | 125 | [1]
With an Allowance Recorded Recorded Investment | 127 | [2] | 125 | [2]
With an Allowance Recorded Related Allowance | 3 |  | 126 |
With an Allowance Recorded Average Recorded Investment | 335 |  | 131 |
With an Allowance Recorded Interest Income Recognized |  | [3] |  | [3]
With no Related Allowance Recorded Unpaid Principal Balance |  | [1] | 345 | [1]
With no Related Allowance Recorded Recorded Investment |  | [2] | 345 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment |  |  | 837 |
With no Related Allowance Recorded Interest Income Recognized |  | [3] |  | [3]
Commercial and industrial [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 2,901 | [1] | 4,580 | [1]
With an Allowance Recorded Recorded Investment | 2,888 | [2] | 4,345 | [2]
With an Allowance Recorded Related Allowance | 873 |  | 1,925 |
With an Allowance Recorded Average Recorded Investment | 2,958 |  | 4,496 |
With an Allowance Recorded Interest Income Recognized | 94 | [3] | 131 | [3]
With no Related Allowance Recorded Unpaid Principal Balance | 56 | [1] | 1,249 | [1]
With no Related Allowance Recorded Recorded Investment | 37 | [2] | 1,099 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment | 81 |  | 1,607 |
With no Related Allowance Recorded Interest Income Recognized |  | [3] | 57 | [3]
Consumer [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 2,854 | [1] | 3,411 | [1]
With an Allowance Recorded Recorded Investment | 2,843 | [2] | 3,411 | [2]
With an Allowance Recorded Related Allowance | 422 |  | 431 |
With an Allowance Recorded Average Recorded Investment | 3,104 |  | 3,591 |
With an Allowance Recorded Interest Income Recognized | 116 | [3] | 172 | [3]
With no Related Allowance Recorded Unpaid Principal Balance | 257 | [1] | 241 | [1]
With no Related Allowance Recorded Recorded Investment | 95 | [2] | 52 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment | 322 |  | 77 |
With no Related Allowance Recorded Interest Income Recognized |  | [3] |  | [3]
Real Estate Loans [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 24,295 | [1] | 22,784 | [1]
With an Allowance Recorded Recorded Investment | 24,185 | [2] | 22,784 | [2]
With an Allowance Recorded Related Allowance | 3,883 |  | 2,867 |
With an Allowance Recorded Average Recorded Investment | 26,601 |  | 23,042 |
With an Allowance Recorded Interest Income Recognized | 521 | [3] | 744 | [3]
With no Related Allowance Recorded Unpaid Principal Balance | 11,439 | [1] | 27,191 | [1]
With no Related Allowance Recorded Recorded Investment | 10,259 | [2] | 24,226 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment | 12,091 |  | 24,743 |
With no Related Allowance Recorded Interest Income Recognized | 89 | [3] | 116 | [3]
Real Estate Loans [Member] | 1-4 family residential construction [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance |  |  |  | [1]
With an Allowance Recorded Recorded Investment |  |  |  | [2]
With an Allowance Recorded Related Allowance |  |  |  |
With an Allowance Recorded Average Recorded Investment |  |  |  |
With an Allowance Recorded Interest Income Recognized |  |  |  | [3]
With no Related Allowance Recorded Unpaid Principal Balance |  |  |  | [1]
With no Related Allowance Recorded Recorded Investment |  |  |  | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment |  |  |  |
With no Related Allowance Recorded Interest Income Recognized |  |  |  | [3]
Real Estate Loans [Member] | Other construction/land [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 4,513 | [1] | 2,972 | [1]
With an Allowance Recorded Recorded Investment | 4,513 | [2] | 2,972 | [2]
With an Allowance Recorded Related Allowance | 578 |  | 502 |
With an Allowance Recorded Average Recorded Investment | 5,271 |  | 3,000 |
With an Allowance Recorded Interest Income Recognized | 69 | [3] | 98 | [3]
With no Related Allowance Recorded Unpaid Principal Balance | 9 | [1] | 4,176 | [1]
With no Related Allowance Recorded Recorded Investment | 9 | [2] | 3,779 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment | 18 |  | 3,885 |
With no Related Allowance Recorded Interest Income Recognized |  | [3] |  | [3]
Real Estate Loans [Member] | 1-4 Family - closed end [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 12,820 | [1] | 13,522 | [1]
With an Allowance Recorded Recorded Investment | 12,820 | [2] | 13,522 | [2]
With an Allowance Recorded Related Allowance | 1,111 |  | 1,324 |
With an Allowance Recorded Average Recorded Investment | 14,000 |  | 13,630 |
With an Allowance Recorded Interest Income Recognized | 201 | [3] | 260 | [3]
With no Related Allowance Recorded Unpaid Principal Balance |  | [1] | 4,655 | [1]
With no Related Allowance Recorded Recorded Investment |  | [2] | 4,376 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment |  |  | 4,687 |
With no Related Allowance Recorded Interest Income Recognized | 1 | [3] | 1 | [3]
Real Estate Loans [Member] | Equity Lines [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 406 | [1] | 528 | [1]
With an Allowance Recorded Recorded Investment | 406 | [2] | 528 | [2]
With an Allowance Recorded Related Allowance | 37 |  | 123 |
With an Allowance Recorded Average Recorded Investment | 491 |  | 530 |
With an Allowance Recorded Interest Income Recognized | 11 | [3] | 13 | [3]
With no Related Allowance Recorded Unpaid Principal Balance | 297 | [1] | 565 | [1]
With no Related Allowance Recorded Recorded Investment | 294 | [2] | 493 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment | 297 |  | 493 |
With no Related Allowance Recorded Interest Income Recognized |  | [3] |  | [3]
Real Estate Loans [Member] | Commercial real estate - owner occupied [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 2,856 | [1] | 2,047 | [1]
With an Allowance Recorded Recorded Investment | 2,746 | [2] | 2,047 | [2]
With an Allowance Recorded Related Allowance | 1,416 |  | 217 |
With an Allowance Recorded Average Recorded Investment | 3,068 |  | 2,069 |
With an Allowance Recorded Interest Income Recognized | 42 | [3] | 135 | [3]
With no Related Allowance Recorded Unpaid Principal Balance | 1,855 | [1] | 7,436 | [1]
With no Related Allowance Recorded Recorded Investment | 826 | [2] | 5,516 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment | 1,932 |  | 5,568 |
With no Related Allowance Recorded Interest Income Recognized |  | [3] |  | [3]
Real Estate Loans [Member] | Commercial real estate - non-owner occupied [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance | 3,700 | [1] | 3,715 | [1]
With an Allowance Recorded Recorded Investment | 3,700 | [2] | 3,715 | [2]
With an Allowance Recorded Related Allowance | 741 |  | 701 |
With an Allowance Recorded Average Recorded Investment | 3,771 |  | 3,813 |
With an Allowance Recorded Interest Income Recognized | 198 | [3] | 238 | [3]
With no Related Allowance Recorded Unpaid Principal Balance | 9,278 | [1] | 10,077 | [1]
With no Related Allowance Recorded Recorded Investment | 9,130 | [2] | 9,780 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment | 9,844 |  | 9,820 |
With no Related Allowance Recorded Interest Income Recognized | 88 | [3] | 115 | [3]
Real Estate Loans [Member] | Farmland [Member] |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
With an Allowance Recorded Unpaid Principal Balance |  | [1] |  | [1]
With an Allowance Recorded Recorded Investment |  | [2] |  | [2]
With an Allowance Recorded Related Allowance |  |  |  |
With an Allowance Recorded Average Recorded Investment |  |  |  |
With an Allowance Recorded Interest Income Recognized |  | [3] |  | [3]
With no Related Allowance Recorded Unpaid Principal Balance |  | [1] | 282 | [1]
With no Related Allowance Recorded Recorded Investment |  | [2] | 282 | [2]
With no Related Allowance Recorded Related Allowance |  |  |  |
With no Related Allowance Recorded Average Recorded Investment |  |  | 290 |
With no Related Allowance Recorded Interest Income Recognized |  | [3] |  | [3]
[1] | (1) Contractual principal balance due from customer.
[2] | (2) Principal balance on Company's books, less any direct charge offs.
[3] | (3) Interest income is recognized on performing balances on a regular accrual basis.

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