ACQUISITIONS AND DIVESTITURES (Schedule Of Business Acquisitions) (Details) - USD ($)		9 Months Ended	12 Months Ended
		Sep. 30, 2017	Dec. 31, 2016
ACQUISITIONS AND DIVESTITURES [Abstract]
Cash		$ 210,562,000
Payable to seller		1,844,000
Total fair value of purchase consideration		212,406,000	$ 33,287,000
Inventories		6,213,000
Other current assets		253,000
Property, plant & equipment		126,426,000
Contractual rights in place		73,092,000
Liabilities assumed		(91,000)
Net identifiable assets acquired		205,893,000
Goodwill	[1]	$ 6,513,000

[1] See Note 16 for a summary of the current year acquisitions.