Employee Benefit Plans (Schedule of Stock Option Activity) (Details) - Stock Options shares in Thousands	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Number of shares
Beginning balance (in shares) | shares	1,969
Exercised (in shares) | shares	(144)
Forfeitures ( in shares) | shares	(16)
Ending balance (in shares) | shares	1,809
Weighted Average Exercise Price Per Share
Beginning balance (in dollars per share) | $ / shares	$ 25.30
Exercised (in dollars per share) | $ / shares	20.50
Forfeitures (in dollars per share) | $ / shares	36.27
Ending balance (in dollars per share) | $ / shares	$ 25.59