Additional disclosures on cash flow information and non-cash activities (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Cash Flow Noncash Investing And Financing Activities Disclosure Abstract
Transfers Of Loans To Other Real Estate Owned	$ 82,338		$ 143,159
Transfers Of Loans To Other Property	20,492		16,009
Total loans transferred to foreclosed assets	102,830		159,168
Transfer Of Portfolio Loans And Leases To Held For Sale 1	1,868,420		438,640
Transfer Of Loans Held For Sale To Portfolio Loans 1	3,245		21,580
Noncash Transfer To Securities From Loans Resulting From Securitization	472,891	[1]	846,327	[1]
Trades receivables from brokers and counterparties	519,495	[2]	158,141		71,680
Trades Payables To Brokers And Counterparties	45,893		72,007
Recognition of mortgage servicing rights on securitizations or asset transfers	6,692		10,152
Loans sold to a joint venture in exchange for an acquisition loan and an equity interest in the join venture	$ 0		$ 194,514

[1] Includes loans securitized into trading securities and subsequently sold before quarter end.

[2] Includes $441 million of trades receivable as of June 30,2014, related to the issuance of $450 million in Senior Notes, which settled on July 1, 2014, net of debt issuance costs of $9 million.