Supplemental Disclosures of Cash Flow Information - Summary of Supplemental Disclosures of Cash Flow Information (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
Supplemental Disclosure of Cash Flow Information
Cash paid for interest			$ 154,843	$ 127,802
Proceeds from Income Tax Refunds			(17,801)	55,444
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Real estate owned acquired through foreclosure			59,484	60,955
Residential loans originated to finance the sale of real estate owned			30,057	34,032
Acquisition of servicing rights			83,868	14,083
Capitalized Servicing Rights [Member]
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Servicing rights capitalized upon transfers of loans	$ 45,554	$ 36,305	$ 98,167	$ 37,595