Loans in non-performing status and accruing loans past-due 90 days or more by loan class (Parenthetical) (Detail) (USD $)	Sep. 30, 2014		Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held-for-sale	$ 178,008,000	[1]	$ 110,426,000
Loans held-in-portfolio, net of unearned income	19,359,216,000	[2]	21,611,866,000	[2]
Financing Receivable Recorded Investment Nonaccrual Status	19,729,000		1,092,000
Reverse Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 90 Days Past Due And Still Accruing	64,000,000		50,000,000
Residential Mortgage Loans Insured By FHA [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Recorded Investment 90 Days Past Due And Still Accruing	125,000,000		115,000,000
Mortgages [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held-for-sale	106,832,000	[1]	109,823,000
Loans held-in-portfolio, net of unearned income	6,555,337,000		6,681,476,000
Financing Receivable Recorded Investment Nonaccrual Status	14,669,000		489,000
Mortgages [Member] | SOP Non-Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held-in-portfolio, net of unearned income	57,000,000		43,000,000
Nonperforming Financing Receivable Member
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held-for-sale	$ 4,000,000		$ 1,000,000

[1] Loans held-for-sale from discontinued operations are presented as part of "Assets from Discontinued Operations" in the Consolidated Statement of Condition. Refer to Note 3 to the consolidated financial statements for further information on the discontinued operations.

[2] Non-covered loans held-in-portfolio at September 30, 2014 are net of $91 million in unearned income and exclude $178 million in loans held-for-sale. (December 31, 2013 - $92 million in unearned income and $110 million in loans held-for-sale.)