Employee Benefit Plans (Schedule of RSU Activity) (Details) - Restricted Stock Units (RSUs) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Number of Shares
Beginning balance (in shares) | shares	1,627
Granted (in shares) | shares	709
Vested (in shares) | shares	(594)
Cancelled (in shares) | shares	(155)
Ending balance (in shares) | shares	1,587
Weighted Average Grant Date Fair Value Per Share
Beginning Balance (in dollars per share) | $ / shares	$ 34.31
Granted (in dollars per share) | $ / shares	31.33
Vested (in dollars per share) | $ / shares	31.35
Cancelled (in dollars per share) | $ / shares	35.67
Ending Balance (in dollars per share) | $ / shares	$ 33.95
Weighted Average Remaining Contractual Term	1 year 4 months 9 days
Average Intrinsic Value | $	$ 38,895