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Stock-Based Compensation - Additional Information (Detail) (USD $) | 3 Months Ended |  | 0 Months Ended |  | 3 Months Ended
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Mar. 31, 2014 Incentive_Plan | Dec. 31, 2013 | Dec. 20, 2013 Equity Incentive Plan [Member] | Mar. 31, 2014 Equity Incentive Plan [Member] | Mar. 31, 2014 Restricted Stock [Member] | Mar. 31, 2014 Restricted Stock Three [Member] | Mar. 31, 2014 Stock Appreciation Rights (SARs) [Member] | Mar. 31, 2014 Options [Member] | Mar. 31, 2014 Maximum [Member] Restricted Stock [Member] | Mar. 31, 2014 Maximum [Member] Options [Member] | Mar. 31, 2014 Minimum [Member] Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares authorized | 225,000,000 | 225,000,000 |  | 10,535,978 |  |  |  |  |  |  |
Annual increase in number of shares of common stock |  |  |  | 4.00% |  |  |  |  |  |  |
Aggregate limit of shares issuable to incentive stock option awards |  |  |  | 3,000,000 |  |  |  |  |  |  |
Equity incentive plans | 3 |  |  |  |  |  |  |  |  |  |
Initial grant of stock-based compensation in shares |  |  | 6,000,000 |  |  |  |  |  |  |  |
Increase in percentage of outstanding number of shares of common stock |  |  | 4.00% |  |  |  |  |  |  |  |
Term of years |  |  |  |  |  |  |  | 4 years | 10 years | 10 years |
Vesting period of grant date |  |  |  |  | 1 year |  | 3 years |  | 3 years | 3 years | 1 year
Restricted stock units vest and convert into shares of our common stock | 4 years |  |  |  |  | 4 years |  |  |  |  |
Percentage of vested grant yearly |  |  |  |  |  |  |  | 25.00% |  |  |
Percentage of vested grant monthly |  |  |  |  |  |  |  | 75.00% |  |  |
Unexercised vested option forfeiture |  |  |  |  |  |  |  | 3 months |  |  |
Total unrecognized compensation expense | $ 3,677,000 |  |  |  |  |  |  |  |  |  |
Vesting period | 2 years 9 months 18 days |  |  |  |  |  |  |  |  |  |
Estimated fair value |  |  |  |  |  |  |  | $ 77,000 |  |  |
Exercise price |  |  |  |  |  |  | $ 20.00 |  |  |  |
Number of SARs outstanding |  |  |  |  |  |  | 110,593 |  |  |  |
Number of SARs, Granted |  |  |  |  |  |  | 0 |  |  |  |
Number of SARs, Exercised |  |  |  |  |  |  | 0 |  |  |  |
Number of SARs, Forfeited and expired |  |  |  |  |  |  | 0 |  |  |  |

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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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