Components of Interest Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Banking and Thrift [Abstract]
Interest on borrowings and related fees	$ 22,559	$ 22,754	$ 69,477	$ 57,239
Accretion of original issue discount 1	0	0	0	431
Amortization of debt issuance costs	1,063	961	3,114	2,415
Capitalized interest	(1,669)	(3,497)	(4,875)	(3,580)
Interest expense	$ 21,953	$ 20,218	$ 67,716	$ 56,505