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, 2017 USD ($) Vote $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 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
Common stock shares, available for repurchase					311,056
Purchase of Treasury Stock, shares					0	180,013	508,931
Purchase of Treasury Stock, per share value | $ / shares					$ 0.00	$ 18.98	$ 19.80
Purchase of Treasury Stock | $					$ 0	$ 3,417	$ 10,078
Weighted average fair value of options and stock appreciation rights granted | $ / shares							$ 7.8
Weighted average fair value of options granted | $ / shares						$ 12.9
Number of shares, Options/SAR units granted	[1]				0
Total intrinsic value of options and stock appreciation rights exercised | $					$ 15,188	$ 12,282	$ 8,960
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)
Class of Stock [Line Items]
Aggregate number of stock issued by the company					0	0
Stock Appreciation Rights (SARs) | Maximum
Class of Stock [Line Items]
Options granted percentage							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]
Aggregate number of stock issued by the company					288,197
Stock incentive plans vesting percentage					33.33%
Fair market value on grant date | $ / shares					$ 37.25
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					1,309,038
2011 Stock Incentive Plan
Class of Stock [Line Items]
Number of common shares authorized for issuance									2,350,000
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					298,604						2,700,000
Minimum working hours for eligibility of employee stock purchase plan					20 hours
Minimum working days for employee stock purchase plan					5 months
Rule 10b-18
Class of Stock [Line Items]
Common stock, additional number of shares authorized to repurchase								1,000,000
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
Employee | Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Award vesting period					3 years
Non-Employee | Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Award vesting period					1 year
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					30,897
Board of Directors | 2003 Director Stock Option Plan
Class of Stock [Line Items]
Option granted			13,000
Committee Chairperson | 2003 Director Stock Option Plan
Class of Stock [Line Items]
Option granted			13,000

[1] The SAR units are convertible for a maximum number of shares of the Company's common stock equal to 75% of the SAR units subject to the grant.