Allowance for Loan Losses - Company's Recorded Investment and Customers' Unpaid Principal Balances for Impaired Loans, with Associated Allowance Amount (Detail) (USD $) | 3 Months Ended | |
In Thousands, unless otherwise specified | Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013 |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | | ' | | ' | |
With no related allowance, Recorded Investment | $5,189 | | ' | | $3,912 | |
With no related allowance, Customers' Unpaid Principal Balance | 5,211 | | ' | | 3,925 | |
With no related allowance, Related Allowance | ' | | ' | | ' | |
With an allowance recorded, Recorded Investment | 2,715 | | ' | | 2,744 | |
With an allowance recorded, Customers' Unpaid Principal Balance | 2,781 | | ' | | 3,377 | |
With an allowance recorded, Related Allowance | 652 | | ' | | 667 | |
Total Impaired Loans, Recorded Investment | 7,904 | | ' | | 6,656 | |
Total Impaired Loans, Customers' Unpaid Principal Balance | 7,992 | | ' | | 7,302 | |
Total Impaired Loans, Related Allowance | 652 | | ' | | 667 | |
With no related allowance, Average Recorded Investment | 4,394 | | 2,009 | | ' | |
With no related allowance, Interest Income Recognized | 57 | | 10 | | ' | |
With an allowance recorded, Average Recorded Investment | 2,731 | | 4,706 | | ' | |
With an allowance recorded, Interest Income Recognized | 26 | | 29 | | ' | |
Total, Average Recorded Investment | 7,125 | | 6,715 | | ' | |
Total, Interest Income Recognized | 83 | | 39 | | ' | |
Construction land & land development | ' | | ' | | ' | |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | | ' | | ' | |
With no related allowance, Recorded Investment | 453 | | ' | | 453 | |
With no related allowance, Customers' Unpaid Principal Balance | 453 | | ' | | 453 | |
With no related allowance, Related Allowance | ' | | ' | | ' | |
With an allowance recorded, Recorded Investment | 148 | | ' | | 151 | |
With an allowance recorded, Customers' Unpaid Principal Balance | 156 | | ' | | 156 | |
With an allowance recorded, Related Allowance | 63 | | ' | | 51 | |
Total Impaired Loans, Recorded Investment | 601 | | ' | | 604 | |
Total Impaired Loans, Customers' Unpaid Principal Balance | 609 | | ' | | 609 | |
Total Impaired Loans, Related Allowance | 63 | | ' | | 51 | |
With no related allowance, Average Recorded Investment | 452 | | 14 | | ' | |
With no related allowance, Interest Income Recognized | 1 | | ' | | ' | |
With an allowance recorded, Average Recorded Investment | 150 | | 200 | | ' | |
Total, Average Recorded Investment | 602 | | 214 | | ' | |
Total, Interest Income Recognized | 1 | | ' | | ' | |
Residential First Mortgages | ' | | ' | | ' | |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | | ' | | ' | |
With no related allowance, Recorded Investment | 1,917 | | ' | | 1,053 | |
With no related allowance, Customers' Unpaid Principal Balance | 1,925 | | ' | | 1,057 | |
With no related allowance, Related Allowance | ' | | ' | | ' | |
With an allowance recorded, Recorded Investment | 2,187 | | ' | | 2,198 | |
With an allowance recorded, Customers' Unpaid Principal Balance | 2,193 | | ' | | 2,198 | |
With an allowance recorded, Related Allowance | 397 | | ' | | 409 | |
Total Impaired Loans, Recorded Investment | 4,104 | | ' | | 3,251 | |
Total Impaired Loans, Customers' Unpaid Principal Balance | 4,118 | | ' | | 3,255 | |
Total Impaired Loans, Related Allowance | 397 | | ' | | 409 | |
With no related allowance, Average Recorded Investment | 1,485 | | 1,143 | | ' | |
With no related allowance, Interest Income Recognized | 22 | | 3 | | ' | |
With an allowance recorded, Average Recorded Investment | 2,193 | | 2,855 | | ' | |
With an allowance recorded, Interest Income Recognized | 21 | | 26 | | ' | |
Total, Average Recorded Investment | 3,678 | | 3,998 | | ' | |
Total, Interest Income Recognized | 43 | | 29 | | ' | |
Residential Revolving and Junior Mortgages | ' | | ' | | ' | |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | | ' | | ' | |
With no related allowance, Recorded Investment | 98 | [1] | ' | | ' | |
With no related allowance, Customers' Unpaid Principal Balance | 98 | [1] | ' | | ' | |
With no related allowance, Related Allowance | ' | [1] | ' | | ' | |
With an allowance recorded, Recorded Investment | 237 | [1] | ' | | 251 | [1] |
With an allowance recorded, Customers' Unpaid Principal Balance | 289 | [1] | ' | | 879 | [1] |
With an allowance recorded, Related Allowance | 159 | [1] | ' | | 173 | [1] |
Total Impaired Loans, Recorded Investment | 335 | [1] | ' | | 251 | [1] |
Total Impaired Loans, Customers' Unpaid Principal Balance | 387 | [1] | ' | | 879 | [1] |
Total Impaired Loans, Related Allowance | 159 | [1] | ' | | 173 | [1] |
With no related allowance, Average Recorded Investment | 49 | [1] | 97 | [1] | ' | |
With no related allowance, Interest Income Recognized | 1 | [1] | ' | | ' | |
With an allowance recorded, Average Recorded Investment | 244 | [1] | 1,042 | [1] | ' | |
With an allowance recorded, Interest Income Recognized | 2 | [1] | 1 | [1] | ' | |
Total, Average Recorded Investment | 293 | [1] | 1,139 | [1] | ' | |
Total, Interest Income Recognized | 3 | [1] | 1 | [1] | ' | |
Commercial Mortgages Non Owner Occupied | ' | | ' | | ' | |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | | ' | | ' | |
With no related allowance, Recorded Investment | 264 | | ' | | 264 | |
With no related allowance, Customers' Unpaid Principal Balance | 264 | | ' | | 264 | |
With no related allowance, Related Allowance | ' | | ' | | ' | |
Total Impaired Loans, Recorded Investment | 264 | | ' | | 264 | |
Total Impaired Loans, Customers' Unpaid Principal Balance | 264 | | ' | | 264 | |
With no related allowance, Average Recorded Investment | 264 | | ' | | ' | |
With no related allowance, Interest Income Recognized | 4 | | ' | | ' | |
Total, Average Recorded Investment | 264 | | ' | | ' | |
Total, Interest Income Recognized | 4 | | ' | | ' | |
Commercial Mortgages Owner Occupied | ' | | ' | | ' | |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | | ' | | ' | |
With no related allowance, Recorded Investment | 2,457 | | ' | | 1,831 | |
With no related allowance, Customers' Unpaid Principal Balance | 2,471 | | ' | | 1,840 | |
With no related allowance, Related Allowance | ' | | ' | | ' | |
With an allowance recorded, Recorded Investment | 105 | | ' | | 105 | |
With an allowance recorded, Customers' Unpaid Principal Balance | 105 | | ' | | 105 | |
With an allowance recorded, Related Allowance | 1 | | ' | | 1 | |
Total Impaired Loans, Recorded Investment | 2,562 | | ' | | 1,936 | |
Total Impaired Loans, Customers' Unpaid Principal Balance | 2,576 | | ' | | 1,945 | |
Total Impaired Loans, Related Allowance | 1 | | ' | | 1 | |
With no related allowance, Average Recorded Investment | 2,144 | | 755 | | ' | |
With no related allowance, Interest Income Recognized | 29 | | 7 | | ' | |
With an allowance recorded, Average Recorded Investment | 105 | | 535 | | ' | |
With an allowance recorded, Interest Income Recognized | 2 | | ' | | ' | |
Total, Average Recorded Investment | 2,249 | | 1,290 | | ' | |
Total, Interest Income Recognized | 31 | | 7 | | ' | |
Commercial and Industrial Loans | ' | | ' | | ' | |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | | ' | | ' | |
With no related allowance, Recorded Investment | ' | | ' | | 311 | |
With no related allowance, Customers' Unpaid Principal Balance | ' | | ' | | 311 | |
With no related allowance, Related Allowance | ' | | ' | | ' | |
Total Impaired Loans, Recorded Investment | ' | | ' | | 311 | |
Total Impaired Loans, Customers' Unpaid Principal Balance | ' | | ' | | 311 | |
Consumer Loan | ' | | ' | | ' | |
Accounts, Notes, Loans and Financing Receivable [Line Items] | ' | | ' | | ' | |
With no related allowance, Related Allowance | ' | [2] | ' | | ' | |
With an allowance recorded, Recorded Investment | 38 | [2] | ' | | 39 | [2] |
With an allowance recorded, Customers' Unpaid Principal Balance | 38 | [2] | ' | | 39 | [2] |
With an allowance recorded, Related Allowance | 32 | [2] | ' | | 33 | [2] |
Total Impaired Loans, Recorded Investment | 38 | [2] | ' | | 39 | [2] |
Total Impaired Loans, Customers' Unpaid Principal Balance | 38 | [2] | ' | | 39 | [2] |
Total Impaired Loans, Related Allowance | 32 | [2] | ' | | 33 | [2] |
With an allowance recorded, Average Recorded Investment | 39 | [2] | 74 | [2] | ' | |
With an allowance recorded, Interest Income Recognized | 1 | [2] | 2 | [2] | ' | |
Total, Average Recorded Investment | 39 | [2] | 74 | [2] | ' | |
Total, Interest Income Recognized | $1 | [2] | $2 | [2] | ' | |
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[1] | Junior mortgages include equity lines. |
[2] | Includes credit cards. |