Annual report pursuant to Section 13 and 15(d)

Common Stock - Additional Information 1 (Detail)

v2.4.0.8
Common Stock - Additional Information 1 (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Right
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average fair value of stock options granted $ 8.07 $ 9.86 $ 10.70
Unrecognized compensation expense related to stock options granted $ 2,700,000    
Estimated grant date fair value of stock options vested 1,800,000 1,600,000 1,100,000
Aggregate intrinsic value of options exercised 34,000 1,200,000 600,000
Aggregate intrinsic value of the outstanding options 1,400,000    
Aggregate intrinsic value of the exercisable outstanding options 1,400,000    
Reverse stock split One-for-eighteen reverse stock split    
Percentage of acquisition of company's common stock 15.00%    
Number of rights per share of common stock 18    
Effect on diluted per share on options, restricted stock units and warrants 3,000,000 2,600,000 2,400,000
Series A preferred stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Junior Participating Preferred Stock at an exercise price 140    
Shareholder rights plan description One one-hundredth    
Stock options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average period, restricted stock awards 2 years 4 months 24 days    
Restricted stock unit awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 4 years    
Weighted-average period, restricted stock awards 2 years 8 months 12 days    
Stock based compensation expense 1,100,000 600,000  
Number of Shares, Granted 255,895 180,085   
Total unrecognized compensation expense related to the Company's restricted stock unit awards $ 2,200,000    
Minimum [Member] | 2010 Performance incentive plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period   1 year  
Minimum [Member] | 2010 Performance incentive plan [Member] | Board of Directors [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period   3 years  
Minimum [Member] | 2010 Performance incentive plan [Member] | Amendment two [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock available for issuance under Performance Incentive Plan 1,050,000 450,000  
Maximum [Member] | 2010 Performance incentive plan [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period   3 years  
Maximum [Member] | 2010 Performance incentive plan [Member] | Board of Directors [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period   4 years  
Maximum [Member] | 2010 Performance incentive plan [Member] | Amendment two [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock available for issuance under Performance Incentive Plan 2,050,000 1,050,000