Fair Value - Changes in Fair Value for Items Measured at Fair Value Pursuant to Election of the Fair Value (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]
Interest (Expense)	$ (5,046)	$ (6,491)	$ (9,833)	$ (13,543)
Residential Loans Held for Sale [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Other Gains and (Losses)	286	(737)	273	(683)
Interest Income	1		1
Interest (Expense)		(3)
Total Changes in Fair Values Included in Current Period Earnings	$ 287	$ (740)	$ 274	$ (683)