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Employee Benefit Plans (Schedule of Stock Option Activity) (Details) - Share-based Payment Arrangement, Option
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Number of shares, beginning balance (in shares) | shares 2,188
Number of shares, exercised (in shares) | shares (778)
Number of shares, cancelled (in shares) | shares (21)
Number of shares, expired (in shares) | shares (56)
Number of shares, ending balance (in shares) | shares 1,333
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Vested and expected to vest (in shares) | shares 1,333
Exercisable (in shares) | shares 912
Beginning balance (in dollars per share) | $ / shares $ 26.03
Exercised (in dollars per share) | $ / shares 21.79
Cancelled (in dollars per share) | $ / shares 35.85
Expired (in dollars per share) | $ / shares 37.91
Ending balance (in dollars per share) | $ / shares 27.86
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares 27.86
Exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 27.09
Outstanding, Weighted Average Remaining Contractual Term 6 years 5 months 4 days
Vested and expected to vest, weighted average remaining contractual term 6 years 5 months 4 days
Exercisable, weighted average remaining contractual term 5 years 8 months 1 day
Outstanding, Intrinsic Value | $ $ 17,308
Vested and expected to vest, aggregate intrinsic value | $ 17,308
Exercisable, intrinsic value | $ $ 12,552