Stockholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended					12 Months Ended				0 Months Ended	12 Months Ended		12 Months Ended	1 Months Ended	12 Months Ended			1 Months Ended
	Dec. 31, 2013 Vote		Dec. 31, 2012	Dec. 31, 2011	May 31, 2010	Dec. 31, 2013 Maximum	Dec. 31, 2013 Stock Appreciation Rights (SARs)	Dec. 31, 2012 Stock Appreciation Rights (SARs)	Dec. 31, 2013 Stock Option And Stock Appreciation Rights	May 17, 2011 2011 Stock Incentive Plan	Dec. 31, 2013 2011 Stock Incentive Plan	Dec. 31, 2013 2003 Director Stock Option Plan	Dec. 31, 2013 2003 Director Stock Option Plan Maximum	Jun. 30, 2004 2003 Director Stock Option Plan Minimum	Dec. 31, 2013 2002 Employee Stock Purchase Plan ESPP	Jul. 31, 2002 2002 Employee Stock Purchase Plan ESPP	Dec. 31, 2013 Non Employee Director	Jun. 30, 2004 Non Employee Director 2003 Director Stock Option Plan	Jun. 30, 2004 Board of Directors Chairman 2003 Director Stock Option Plan	Jun. 30, 2004 Board of Directors 2003 Director Stock Option Plan	Jun. 30, 2004 Committee Chairperson 2003 Director Stock Option Plan	May 31, 2010 10b5-1 plan	Aug. 31, 2008 10b5-1 plan	Dec. 31, 2013 Rule 10b-18	Jul. 31, 2013 Rule 10b-18	Jan. 31, 2012 Rule 10b-18	May 31, 2010 Rule 10b-18
Class of Stock [Line Items]
Number of vote per share entitled by holders of common stock	1
Preferred stock, shares authorized	5,000,000		5,000,000
Preferred stock, par value	$ 0.001		$ 0.001
Common stock shares, authorized																						1,000,000	1,000,000	1,227,148			1,000,000
Common stock shares, additional authorized					2,000,000																				2,000,000
Share repurchase program termination period																						2011-11
Common stock shares, remaining authorized																										1,966,700
Purchase of Treasury Stock, shares	1,257,004		1,482,548	0
Purchase of Treasury Stock, per share value	$ 15.76		$ 18.33
Purchase of Treasury Stock	$ 19,816		$ 27,168
Options granted percentage							400.00%	400.00%
Options granted under stock incentive plans vesting rate, year one	25.00%
Shares vesting period						4 years
Remaining shares vesting period	36 months
Options granted under stock incentive plan vesting rate, each anniversary																	25.00%
Weighted average fair value of options granted	$ 7.2		$ 7.4	$ 11.6
Total intrinsic value of options exercised	$ 1,336		$ 581	$ 18,286
Number of options available for grant under stock plan									245,632						202,934	2,150,000
Additional common stock authorized for issuance										1,100,000
Share incentive plan expiration											2021-02
Number of common shares authorized for issuance												1,100,000
Options term													10 years
Option granted	825,750	[1]					693,750											38,000	15,000	13,000	13,000
Requisite period of service to get option granted														6 months
Minimum working hours for eligibility of employee stock purchase plan															20 hours
Minimum working days for employee stock purchase plan															5 months

[1] Includes 693,750 SAR units which 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.