Employee Benefit Plans (Schedule Of Changes In The Benefit Obligation, The Plan Assets, The Funded Status Of Pension Plans And Components Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Change in Projected Benefit Obligation:
Benefit obligation at beginning of year	$ 50,218	$ 38,072
Service cost	1,252	1,008	$ 1,281
Interest cost	1,899	1,800	1,544
Actuarial loss (gain)	(1,830)	11,020
Benefit payments	(1,824)	(1,682)
Benefit obligation at end of year	49,715	50,218	38,072
Change in Plan Assets:
Fair value of plan assets at beginning of year	42,606	39,327
Actual return on plan assets	59	2,861
Employer contributions	1,500	2,100
Benefit payments	(1,824)	(1,682)
Fair value of plan assets at end of year	42,341	42,606	$ 39,327
Unfunded status at end of year (included in accounts payable and accrued expenses in 2015 and 2014)	(7,374)	(7,612)
Accumulated benefit obligation	49,632	50,104
Net loss recognized in accumulated other comprehensive loss	$ 16,361	$ 16,508