Debt (Schedule Of Interest Expense, Net) (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Debt Instrument [Line Items]
Interest expense, net	$ 11,838,000	$ 9,487,000	$ 21,883,000	$ 18,438,000
Segment, Continuing Operations [Member]
Debt Instrument [Line Items]
Contractual and other interest expense	9,200,000	7,100,000	16,800,000	13,500,000
Accretion of senior convertible note discount	1,300,000	1,200,000	2,600,000	2,400,000
Amortization of deferred financing costs and commitment fees	1,400,000	1,300,000	2,700,000	2,700,000
Total interest expense	11,900,000	9,600,000	22,100,000	18,600,000
Interest income	(100,000)	(100,000)	(200,000)	(200,000)
Interest expense, net	$ 11,800,000	$ 9,500,000	$ 21,900,000	$ 18,400,000