XML 128 R137.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Regulatory Restrictions and Capital Adequacy - Additional Information (Detail) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Regulatory Capital Requirements [Abstract] |  |  |
Cash Dividends Declared per Common Share (in dollars per share) | $ 0.28us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23us-gaap_CommonStockDividendsPerShareDeclared | $ 0.18us-gaap_CommonStockDividendsPerShareDeclared

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RegulatoryCapitalRequirementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration