Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v2.4.0.6
Stock-Based Compensation (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Summary of compensation expense and stock award activity    
Stock-based compensation expense $ 1,844 $ 1,653
Exercise of stock options, shares 122,273 68,700
Performance based awards [Member]
   
Summary of compensation expense and stock award activity    
Non-vested shares granted 62,500 56,250
Restricted Stock Awards [Member]
   
Summary of compensation expense and stock award activity    
Non-vested shares granted 332,100 349,250
Restricted stock awards vested (includes performance based awards) 274,600 193,616