Summary of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Beginning balances	$ 220,955	$ 214,492
Acquisitions	10,883	6,463
Ending balances	231,838	220,955
Title
Goodwill [Line Items]
Beginning balances	198,699	192,670
Acquisitions	28	6,029
Ending balances	198,727	198,699
Mortgage Services
Goodwill [Line Items]
Beginning balances	22,256	21,822
Acquisitions	10,855	434
Ending balances	$ 33,111	$ 22,256

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant