Debt (Schedule Of Interest Expense, Net) (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Debt Instrument [Line Items]
Interest expense, net	$ 10,045,000	$ 8,951,000
Segment, Continuing Operations [Member]
Debt Instrument [Line Items]
Contractual and other interest expense	7,600,000	6,500,000
Accretion of senior convertible note discount	1,300,000	1,200,000
Amortization of deferred financing costs and commitment fees	1,300,000	1,400,000
Total interest expense	10,100,000	9,100,000
Interest income	(100,000)	(100,000)
Interest expense, net	$ 10,000,000	$ 9,000,000