Summary of Significant Accounting Policies (Net Income Per Share) (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Basic weighted average shares outstanding (in shares)	42,361	51,016	56,205
Effect of dilution:
Diluted weighted average shares outstanding (in shares)	43,439	51,733	57,037
Stock options
Effect of dilution:
Effect of dilution (in shares)	3	0	14
Restricted stock units
Effect of dilution:
Effect of dilution (in shares)	1,075	717	818