Other Real Estate Owned - Summary of OREO Valuation Allowance Activity (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Changes in Other Real Estate Owned Valuation Allowance
Balance at beginning of period	$ 36,009	$ 20,583	$ 30,842
Valuation adjustments	4,937	1,493	7,840
Sales	(10,104)	(7,827)	(18,099)
Balance at end of period	$ 30,842	$ 14,249	$ 20,583

The aggregate selling price reductions recognized during an accounting period due to the rendering of deficient or nonconforming services. Allowances are a deduction from gross revenue in arriving at net revenue.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_SalesAllowancesServices
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration