Discontinued Operations - Components of net (loss) income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Segment, Discontinued Operations [Member]	Sep. 30, 2013 Segment, Discontinued Operations [Member]	Sep. 30, 2014 Segment, Discontinued Operations [Member]	Sep. 30, 2013 Segment, Discontinued Operations [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net interest income				$ 16,022	$ 23,195	$ 56,911	$ 66,172
Provision for Loan and Lease Losses		215,378	545,927	0	6,515	(6,764)	(1,345)
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax				25,775	0	25,775	0
Other operating income				6,567,000	5,250,000	26,488,000	13,642,000
Non interest Income				32,342,000	5,250,000	52,263,000	13,642,000
Personnel costs				11,941	8,487	32,910	25,215
Occupancy Net				(1,305)	3,325	5,871	9,355
Professional fees				4,916	2,802	13,612	8,511
Goodwill Written Off Related To Business Unit To Be Disposed	186,500			0	0	186,511	0
Other operating expenses				3,054	3,694	9,100	9,422
Total operating expenses				18,606,000	18,308,000	248,004,000	52,503,000
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax, Total				$ 29,758	$ 3,622	$ (132,066)	$ 28,656