Summary of Other Assets (Detail) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Line Items]
REO	$ 9,880	$ 14,481
Fixed assets and leasehold improvements	3,221	3,692
Derivative margin posted, net	23,913	16,233
Investment receivable	832	883
Income tax receivables	4,737	1,243
Prepaid expenses	722	1,973
Other	158	157
Total Other Assets	$ 43,463	$ 38,662