Employee Benefit Plans (Schedule Of RSU Activity) (Details) - RSUs [Member] $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Equity Instruments Other than Options, Nonvested [Roll Forward]
Beginning Balance (in shares) | shares	858
RSUs granted (in shares) | shares	525
RSUs vested (in shares) | shares	(285)
RSUs cancelled (in shares) | shares	(134)
Ending Balance (in shares) | shares	964
Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Beginning Balance (in dollars per share) | $ / shares	$ 30.68
RSUs granted (in dollars per share) | $ / shares	32.16
RSUs vested (in dollars per share) | $ / shares	31.06
RSUs cancelled (in dollars per share) | $ / shares	31.52
Ending Balance (in dollars per share) | $ / shares	$ 31.63
Weighted Average Remaining Contractual Terms	1 year 5 months 15 days
Equity Instruments Other than Options, Nonvested Intrinisc Value | $	$ 40,399