Components of Interest Expense (Detail) (USD $) In Thousands, except Share data in Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Banking and Thrift [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	18.8	19.2	17.2	0.1
Interest on borrowings and related fees	$ 23,778	$ 20,902	$ 46,918	$ 34,485
Accretion of original issue discount 1	0	110	0	431
Amortization of debt issuance costs	1,039	829	2,051	1,454
Capitalized interest 2	1,588	(33)	(3,206)	(83)
Interest expense	$ 23,229	$ 21,808	$ 45,763	$ 36,287