Components of Interest Expense (Detail) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Component of Other Expense, Nonoperating [Line Items]
Interest on borrowings and related fees	$ 13,120	$ 10,709	$ 23,867	$ 21,487
Accretion on original issue discount	583	2,001	2,788	4,111
Amortization of debt issuance costs	895	964	1,962	2,109
Capitalized interest	(455)	(355)	(990)	(717)
Other, net		2		2
Interest expense	$ 14,143	$ 13,321	$ 27,627	$ 26,992