Annual report pursuant to Section 13 and 15(d)

Retirement Plans - Additional Information (Detail)

v2.4.0.8
Retirement Plans - Additional Information (Detail) (Retirement Plans [Member], USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Retirement Plans [Member]
     
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Defined contribution plan minimum eligible period Have completed one month of service and have reached age 21.    
Defined contribution plan, maximum percentage of employee contribution 100.00%    
Defined contribution plan, maximum employee contribution $ 17,500 $ 17,000 $ 16,500
Defined contribution plan, minimum age for additional contribution 50.00%    
Defined contribution plan, percentage of employee salary 4.00%    
Defined contribution plan, additional contribution 5,500    
Defined contribution plan, total contributions 300,000 0 0
Defined contribution plan, employee retirement benefits age 59 years 6 months    
Defined contribution plan, maximum annual employer contribution per employee $ 4,000    
Defined contribution plan, minimum age 50 years    
Defined contribution plan, new plan date 2014-01