Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Exp) (Details)

v3.3.1.900
Stock-Based Compensation (Exp) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Summary of employee stock-based compensation expense      
Employee stock-based compensation expense $ 15,161 $ 11,423 $ 8,738
Tax effect on employee stock-based compensation expense (7,678) (4,434) (3,196)
Net effect on income $ 7,483 $ 6,989 $ 5,542