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Stock-Based Compensation - Additional Information (Detail) |  | 3 Months Ended
--- | --- | ---
Dec. 20, 2013 shares | Mar. 31, 2016 USD ($) Incentive_Plan $ / shares shares | Mar. 31, 2015 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Equity incentive plans | Incentive_Plan |  | 2 |
Total unrecognized compensation expense | $ |  | $ 4,355,000 |
Vesting period |  | 1 year 6 months |
Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares available for grant | 500,000 | 1,016,949 |
Annual increase in number of shares of common stock |  | 4.00% |
Aggregate limit of shares issuable to incentive stock option awards |  | 250,000 |
Increase in percentage of outstanding number of shares of common stock | 4.00% |  |
Stock Appreciation Rights (SARs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Term of years |  | 10 years |
Exercise price | $ / shares |  | $ 240.00 |
Percentage of vested grant yearly |  | 25.00% |
Percentage of vested grant monthly |  | 75.00% |
Number of SARs, outstanding |  | 9,217 | 9,217
Number of SARs, Granted |  | 0 |
Number of SARs, Exercised |  | 0 |
Number of SARs, Forfeited |  | 0 |
Vesting period of grant date |  | 3 years |
Reduced compensation expense | $ |  | $ 0 | $ 0
Restricted Stock [Member] | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Term of years |  | 10 years |
Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Unexercised vested option forfeiture |  | 3 months |
Options [Member] | Maximum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Term of years |  | 10 years |

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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