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Shareholders' Equity (Stock-Based Compensation Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Equity [Abstract]      
Stock-based compensation expense $ 24,582 $ 23,805 $ 36,366
Less: Deferred tax benefit (4,814) (5,078) (7,891)
Stock-based compensation expense, net of tax $ 19,768 $ 18,727 $ 28,475