Equity Investees (Schedule Of Operations For Equity Investees) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Equity Method Investments and Joint Ventures [Abstract]
Revenues	$ 49,824	$ 40,740
Operating income	30,475	21,100
Net income	$ 29,706	$ 20,455