Debt (Schedule Of Interest Expense, Net) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Interest expense:
Contractual and other interest expense	$ 9,700,000	$ 7,900,000
Accretion of senior convertible note discount	1,400,000	1,300,000
Amortization of deferred financing costs	900,000	900,000
Total interest expense	12,000,000	10,100,000
Interest income	0	(100,000)
Interest expense, net	$ 12,003,000	$ 10,045,000