Assets Acquired in FDIC-Assisted Acquisitions - Changes in FDIC Share-Loss Receivable (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Business Combinations [Abstract]
Balance, beginning of year	$ 65,441	$ 159,724	$ 159,724
Indemnification asset recorded in acquisitions	0
Payments received from FDIC	(10,576)	(45,604)	(68,822)
Effect of change in expected cash flows on covered assets	(5,685)	(8,607)	(25,461)
Balance, end of year	$ 49,180	$ 105,513	$ 65,441

The amount of indemnification assets (amounts to be reimbursed if and when certain assumed liabilities are paid) recognized at the acquisition date of a business combination.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

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