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Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 07, 2014 Employee $ / shares shares | Jul. 01, 2004 shares | Jun. 30, 2004 shares | Dec. 31, 2015 USD ($) Vote $ / shares shares | Dec. 31, 2014 USD ($) $ / shares shares | Dec. 31, 2013 USD ($) $ / shares shares | Oct. 31, 2014 shares | May. 17, 2011 shares | Aug. 31, 2008 shares | Jul. 31, 2002 shares
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Number of vote per share entitled by holders of common stock | Vote |  |  |  | 1 |  |  |  |  |  |
Preferred stock, shares authorized |  |  |  | 5,000,000 | 5,000,000 |  |  |  |  |
Preferred Stock, par value | $ / shares |  |  |  | $ 0.001 | $ 0.001 |  |  |  |  |
Common stock shares, authorized |  |  |  |  |  |  |  |  | 1,000,000 |
Common stock, additional number of shares authorized to repurchase |  |  |  | 4,000,000 |  |  |  |  |  |
Purchase of Treasury Stock, shares |  |  |  | 508,931 | 1,227,148 | 1,257,004 |  |  |  |
Purchase of Treasury Stock, per share value | $ / shares |  |  |  | $ 19.80 | $ 15.20 | $ 15.76 |  |  |  |
Purchase of Treasury Stock | $ |  |  |  | $ 10,078 | $ 18,657 | $ 19,816 |  |  |  |
Weighted average fair value of options and stock appreciation rights granted | $ / shares |  |  |  | $ 7.8 | $ 6.1 | $ 7.2 |  |  |  |
Total intrinsic value of options and stock appreciation rights exercised | $ |  |  |  | $ 8,960 | $ 1,372 | $ 1,336 |  |  |  |
Rule 10b-18 |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, additional number of shares authorized to repurchase |  |  |  |  |  |  | 1,000,000 |  |  |
Remained authorized for repurchase |  |  |  | 491,069 |  |  |  |  |  |
2011 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Options and stock appreciation rights granted under stock incentive plans vesting rate, year one |  |  |  | 25.00% |  |  |  |  |  |
Remaining shares vesting period |  |  |  | 36 months |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  | 4 years |  |  |  |  |  |
Stock Appreciation Rights (SARs) | Maximum |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Options granted percentage |  |  |  | 400.00% | 400.00% |  |  |  |  |
Stock Appreciation Rights (SARs) | RivieraWaves |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Award vesting period | 4 years |  |  |  |  |  |  |  |  |
Remaining shares vesting period | 36 months |  |  |  |  |  |  |  |  |
Aggregate number of stock issued by the company | 113,000 |  |  |  |  |  |  |  |  |
Number of employees joined the company | Employee | 27 |  |  |  |  |  |  |  |  |
Fair market value on grant date | $ / shares | $ 15.17 |  |  |  |  |  |  |  |  |
Award vesting description |  |  |  | All of the SARs were priced at $15.17, the fair market value on the grant date, and will vest over four years, with 25% of the SARs vesting after one year and the remaining vest in equal portions over the following 36 months, such that all SARs will vest after four years, subject to the employee's continuous service through each vesting date. |  |  |  |  |  |
Description of award term |  |  |  | The SARs have a ceiling limit for maximum income capped at 400%, expire seven years from the grant date and are subject to the terms and condition of the individual SAR agreements. |  |  |  |  |  |
Award expiration period | 7 years |  |  |  |  |  |  |  |  |
Stock Appreciation Rights (SARs) | RivieraWaves | SARs Vesting After One Year |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Vesting percentage | 25.00% |  |  |  |  |  |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  | 3 years |  |  |  |  |  |
Stock incentive plans vesting percentage |  |  |  | 33.33% |  |  |  |  |  |
Aggregate number of stock issued by the company |  |  |  | 245,000 |  |  |  |  |  |
Fair market value on grant date | $ / shares |  |  |  | $ 19.89 |  |  |  |  |  |
Award vesting description |  |  |  | RSUs granted to employees generally vest in three equal annual installments starting on the first anniversary of the grant date. RSUs granted to non-employee directors generally vest in full on the first anniversary of the grant date. |  |  |  |  |  |
Stock Options, Stock Appreciation Rights and Restricted Stock Units |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Number of options available for grant under stock plan |  |  |  | 878,798 |  |  |  |  |  |
2011 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Number of common shares authorized for issuance |  |  |  |  |  |  |  | 1,750,000 |  |
Share incentive plan expiration |  |  |  | 2021-02 |  |  |  |  |  |
2003 Director Stock Option Plan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Number of common shares authorized for issuance |  |  |  | 1,350,000 |  |  |  |  |  |
2003 Director Stock Option Plan | Maximum |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Award expiration period |  |  |  | 10 years |  |  |  |  |  |
2003 Director Stock Option Plan | Minimum |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Requisite period of service to get option granted |  | 6 months |  |  |  |  |  |  |  |
2002 Employee Stock Purchase Plan ESPP |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Number of options available for grant under stock plan |  |  |  | 313,410 |  |  |  |  |  | 2,500,000
Minimum working hours for eligibility of employee stock purchase plan |  |  |  | 20 hours |  |  |  |  |  |
Minimum working days for employee stock purchase plan |  |  |  | 5 months |  |  |  |  |  |
Non Employee Director |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Options granted under stock incentive plan vesting rate, each anniversary |  |  |  | 25.00% |  |  |  |  |  |
Non Employee Director | Restricted Stock Units (RSUs) |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  | 1 year |  |  |  |  |  |
Non Employee Director | 2003 Director Stock Option Plan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Option granted |  |  | 38,000 |  |  |  |  |  |  |
Board of Directors Chairman | 2003 Director Stock Option Plan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Option granted |  | 15,000 |  |  |  |  |  |  |  |
Board of Directors | 2011 Stock Incentive Plan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate number of stock issued by the company |  |  |  | 33,000 |  |  |  |  |  |
Board of Directors | 2003 Director Stock Option Plan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Option granted |  | 13,000 |  | 66,000 |  |  |  |  |  |
Committee Chairperson | 2003 Director Stock Option Plan |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Option granted |  | 13,000 |  |  |  |  |  |  |  |

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