Net Income per Share (Reconciliation Between Basic and Diluted Weighted Average Shares Outstanding) (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic weighted average shares outstanding (in shares)	52,311	56,590	53,894	56,589
Effect of dilution:
Diluted weighted average shares outstanding (in shares)	52,797	57,335	54,429	57,529
Stock options
Effect of dilution:
Effect of dilution (in shares)	0	15	0	24
Restricted stock units
Effect of dilution:
Effect of dilution (in shares)	486	730	535	916