A segregation of retained earnings which is available for dividend distribution. Earnings not paid out as dividends but instead reinvested in the core business or used to pay off debt. Unappropriated profit is part of shareholder equity. Also called cumulative distributions or earned surplus or accumulated earnings or unappropriated profit.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(a)(4)(ii))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

Capital Requirements and Restrictions on Retained Earnings - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2017 Event CapitalCategory	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2018 USD ($)
Securities Financing Transaction [Line Items]
Capital conservation buffer phase ratio		1.25%	0.625%	0.00%
Number of capital categories provided by PCA regulation \| CapitalCategory		5
Number of events resulting in change in Bank's capital category \| Event		0
Scenario, Forecast [Member]
Securities Financing Transaction [Line Items]
Capital conservation buffer phase ratio	2.50%
Accumulated net earnings \| $					$ 30,615