Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation [Abstract]        
Stock-based compensation expense $ 3,200 $ 3,400 $ 6,700 $ 7,700
Capitalized stock-based compensation 1,300 $ 1,300 2,694 $ 3,066
Unrecognized compensation expense $ 15,400   $ 15,400  
Weighted average period     1 year 6 months 7 days