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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic weighted average common shares outstanding (in shares)	42,481	52,311	42,207	53,894
Effect of dilution:
Diluted weighted average common shares outstanding (in shares)	43,382	52,797	43,277	54,429
Stock options
Effect of dilution:
Effect of dilution (in shares)	0	0	6	0
Restricted stock units
Effect of dilution:
Effect of dilution (in shares)	901	486	1,064	535