Summary of Stock Option Activity (Detail) - 2003 Plan - $ / shares |
9 Months Ended | 12 Months Ended |
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Sep. 30, 2016 |
Dec. 31, 2015 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Number of Option, Beginning Balance | 31,483 | |
| Number of Option, Expired | (3,655) | |
| Number of Option, Ending Balance | 27,828 | 31,483 |
| Weighted Average Exercise Price, Beginning Balance | $ 43.64 | |
| Weighted Average Exercise Price, Expired | 44.64 | |
| Weighted Average Exercise Price, Ending Balance | $ 44.76 | $ 43.64 |
| Weighted Average Contractual Life, Beginning of Period | 3 years 3 months 4 days | 3 years 9 months 7 days |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. No definition available.
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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