v2.4.0.6
Income Taxes - Total Income Tax Expense Differed from Amounts Computed by Applying U.S. Federal Statutory Tax Rates to Pre-Tax Income (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Reconciliation Of Effective Income Tax Rate [Line Items]      
Statutory tax at 34% $ 3,306 $ 3,648 $ 3,931
State taxes, net of federal impact (21) 289 184
Permanent differences 53 (289) 53
Other differences   (160) (68)
Total $ 3,338 $ 3,488 $ 4,100