Capital Requirements - Additional Information (Detail) (Subsidiaries [Member], GSEs and State Authorities [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Minimum [Member]
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Minimum tangible net worth required	$ 0.1	$ 0.3
Maximum [Member]
Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items]
Minimum tangible net worth required	$ 399.0	$ 114.7

The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (c)(a)

-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

Name:	us-gaap_MinimumNetWorthRequiredForCompliance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant