XML 70 R60.htm IDEA: XBRL DOCUMENT v2.4.0.6
Share-Based Payments - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Sep. 23, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of issued and outstanding shares of common stock provides for grants of restricted common stock, restricted stock units and other equity-based awards       7.50%
Recognized stock-based compensation expense $ 3,624 $ 1,788 $ 1,452  
RSU Vesting [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock, shares delivered 67,354      
Stock units vested 112,084      
Reduction of capital increase related to equity incentive plan $ 779