Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grants	0	0	0	0	0
Stock option or restricted stock grants under 2000 and 2004 Employee stock option plans, Independent Director Stock Option Plan, and Stock Incentive Plan of 2006, vesting period	1 year
Stock options granted to non-executive officers during 2005	3 weeks
Stock options granted to non-employee directors under Independent Director Stock Option Plan, purchase price as a percentage of market price on date of grant	125.00%
Number of shares authorized for future incentive awards under our Stock Incentive Plan of 2006	384,000
Unrecognized compensation cost related to unvested stock options granted under various stock-based compensation plans	$ 0
Total unrecognized compensation costs relating to unvested restricted stock granted under Stock Incentive Plan of 2006	400,000
Intrinsic value of all stock options outstanding and exercisable	100,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted to employees under 2000, and 2004 Employee Stock Option Plans, Independent Director Stock Option Plan, and Stock Incentive Plan of 2006, expiration period	10 years
Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option or restricted stock grants under 2000 and 2004 Employee stock option plans, Independent Director Stock Option Plan, and Stock Incentive Plan of 2006, vesting period	4 years
Payments received from employees for restricted stock awards	$ 0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted to employees under 2000, and 2004 Employee Stock Option Plans, Independent Director Stock Option Plan, and Stock Incentive Plan of 2006, expiration period	7 years
Stock option or restricted stock grants under 2000 and 2004 Employee stock option plans, Independent Director Stock Option Plan, and Stock Incentive Plan of 2006, vesting period	2 years
Director Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted to employees under 2000, and 2004 Employee Stock Option Plans, Independent Director Stock Option Plan, and Stock Incentive Plan of 2006, expiration period	10 years
Stock option or restricted stock grants under 2000 and 2004 Employee stock option plans, Independent Director Stock Option Plan, and Stock Incentive Plan of 2006, vesting period	5 years
Director Stock Option Plan [Member] | Restricted stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option or restricted stock grants under 2000 and 2004 Employee stock option plans, Independent Director Stock Option Plan, and Stock Incentive Plan of 2006, vesting period	2 years