Loans and Allowances for Credit Losses - Schedule of Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified
|
3 Months Ended |
12 Months Ended |
Mar. 31, 2014
|
Dec. 31, 2013
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
$ 6,613 |
$ 8,842 |
Unpaid Principal Balance |
8,328 |
10,441 |
Related Allowance |
2,131 |
2,459 |
Average Recorded Investment |
7,730 |
7,850 |
Construction, land development and other land loans [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
324 |
277 |
Unpaid Principal Balance |
341 |
289 |
Related Allowance |
|
|
Average Recorded Investment |
301 |
711 |
Agriculture and Agriculture Real Estate (Includes Farmland) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
207 |
35 |
Unpaid Principal Balance |
323 |
84 |
Related Allowance |
48 |
18 |
Average Recorded Investment |
122 |
74 |
1-4 Family residential (includes home equity) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
2,949 |
3,103 |
Unpaid Principal Balance |
3,049 |
3,212 |
Related Allowance |
767 |
890 |
Average Recorded Investment |
3,026 |
2,297 |
Commercial Real Estate (Includes Multi-Family Residential) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
1,422 |
4,103 |
Unpaid Principal Balance |
2,645 |
5,413 |
Related Allowance |
7 |
445 |
Average Recorded Investment |
2,763 |
3,502 |
Commercial and Industrial [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
1,562 |
1,214 |
Unpaid Principal Balance |
1,809 |
1,314 |
Related Allowance |
1,217 |
1,029 |
Average Recorded Investment |
1,388 |
1,172 |
Consumer and other [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
149 |
110 |
Unpaid Principal Balance |
161 |
129 |
Related Allowance |
92 |
77 |
Average Recorded Investment |
130 |
94 |
With No Related Allowance Recorded [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
2,830 |
3,483 |
Unpaid Principal Balance |
4,405 |
4,946 |
Related Allowance |
|
|
Average Recorded Investment |
3,158 |
2,873 |
With No Related Allowance Recorded [Member] | Construction, land development and other land loans [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
324 |
277 |
Unpaid Principal Balance |
341 |
289 |
Related Allowance |
|
|
Average Recorded Investment |
301 |
711 |
With No Related Allowance Recorded [Member] | Agriculture and Agriculture Real Estate (Includes Farmland) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
27 |
14 |
Unpaid Principal Balance |
137 |
57 |
Related Allowance |
|
|
Average Recorded Investment |
21 |
46 |
With No Related Allowance Recorded [Member] | 1-4 Family residential (includes home equity) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
762 |
584 |
Unpaid Principal Balance |
829 |
664 |
Related Allowance |
|
|
Average Recorded Investment |
673 |
538 |
With No Related Allowance Recorded [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
1,415 |
2,490 |
Unpaid Principal Balance |
2,637 |
3,798 |
Related Allowance |
|
|
Average Recorded Investment |
1,953 |
1,470 |
With No Related Allowance Recorded [Member] | Commercial and Industrial [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
293 |
103 |
Unpaid Principal Balance |
452 |
122 |
Related Allowance |
|
|
Average Recorded Investment |
198 |
95 |
With No Related Allowance Recorded [Member] | Consumer and other [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
9 |
15 |
Unpaid Principal Balance |
9 |
16 |
Related Allowance |
|
|
Average Recorded Investment |
12 |
13 |
With an Allowance Recorded [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
3,783 |
5,359 |
Unpaid Principal Balance |
3,923 |
5,495 |
Related Allowance |
2,131 |
2,459 |
Average Recorded Investment |
4,572 |
4,977 |
With an Allowance Recorded [Member] | Construction, land development and other land loans [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
|
|
Unpaid Principal Balance |
|
|
Related Allowance |
|
|
Average Recorded Investment |
|
|
With an Allowance Recorded [Member] | Agriculture and Agriculture Real Estate (Includes Farmland) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
180 |
21 |
Unpaid Principal Balance |
186 |
27 |
Related Allowance |
48 |
18 |
Average Recorded Investment |
101 |
28 |
With an Allowance Recorded [Member] | 1-4 Family residential (includes home equity) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
2,187 |
2,519 |
Unpaid Principal Balance |
2,220 |
2,548 |
Related Allowance |
767 |
890 |
Average Recorded Investment |
2,353 |
1,759 |
With an Allowance Recorded [Member] | Commercial Real Estate (Includes Multi-Family Residential) [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
7 |
1,613 |
Unpaid Principal Balance |
8 |
1,615 |
Related Allowance |
7 |
445 |
Average Recorded Investment |
810 |
2,032 |
With an Allowance Recorded [Member] | Commercial and Industrial [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
1,269 |
1,111 |
Unpaid Principal Balance |
1,357 |
1,192 |
Related Allowance |
1,217 |
1,029 |
Average Recorded Investment |
1,190 |
1,077 |
With an Allowance Recorded [Member] | Consumer and other [Member]
|
|
|
Financing Receivable, Impaired [Line Items] |
|
|
Recorded Investment |
140 |
95 |
Unpaid Principal Balance |
152 |
113 |
Related Allowance |
92 |
77 |
Average Recorded Investment |
$ 118 |
$ 81 |