Net Income per Share (Reconciliation Between Basic and Diluted Weighted Average Shares Outstanding) (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic weighted average shares outstanding (in shares)	52,346	55,847	53,374	56,339
Effect of dilution:
Diluted weighted average shares outstanding (in shares)	52,904	56,605	53,917	57,218
Stock options
Effect of dilution:
Effect of dilution (in shares)	0	7	0	18
Restricted stock units
Effect of dilution:
Effect of dilution (in shares)	558	751	543	861