Components of Interest Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Banking and Thrift [Abstract]
Interest on borrowings and related fees	$ 56,079	$ 51,384	$ 43,060
Accretion of original issue discount	1,367	3,427	8,109
Amortization of debt issuance costs	2,695	3,380	3,875
Capitalized interest	(803)	(1,983)	(1,384)
Other, net	1	8	19
Interest expense	$ 59,339	$ 56,216	$ 53,679