XML 42 R32.htm IDEA: XBRL DOCUMENT v3.10.0.1
Basis of Presentation - Accounting for Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Stock-based compensation activity, including both continuing and discontinued operations          
Stock-based compensation expense recognized in operating expenses $ 2,900 $ 3,200 $ 6,000 $ 11,200  
Proceeds to the Company from the exercise of stock-based compensation     695 1,297  
Tax effect from the exercise of stock-based compensation, including shortfall tax benefits (1)     791    
Fair value of financial instruments          
Money Market Funds 6,958 $ 3,438 6,958 $ 3,438 $ 5,293
Contingent Consideration $ 1,400   $ 1,400    
Income Taxes          
Effective tax rate (as a percent) 27.20% 37.20% 25.40% 32.20%  
Provision for income taxes $ 16,476 $ 16,712 $ 23,729 $ 24,392