Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Exp) (Details)

v3.8.0.1
Stock-Based Compensation (Exp) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Summary of employee stock-based compensation expense        
Stock-based compensation expense $ 8,048 $ 7,554 $ 23,451 $ 25,872
Tax effect on stock-based compensation expense (3,018) (3,022) (8,794) (10,349)
Net effect on income $ 5,030 $ 4,532 $ 14,657 $ 15,523
Statutory rate (as a percent) 37.50% 40.00% 37.50% 40.00%
Tax effect on stock-based compensation expense after valuation allowance $ 0   $ 0