Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v2.4.0.8
Stock-Based Compensation (Narrative) (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Share-based Compensation [Abstract]        
Stock-based compensation expense $ 1,500,000 $ 1,100,000 $ 3,000,000 $ 2,300,000
Capitalized stock-based compensation 600,000 454,000 1,201,000 908,000
Unrecognized compensation expense $ 10,100,000   $ 10,100,000  
Weighted average period     1 year 7 months 13 days