Dividends, Stock, Percent

No definition available.

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- Definition

Stock Repurchase Program Percentage Of Shares Repurchase Of Outstanding Share

+ References

No definition available.

+ Details

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- Definition

The maximum percentage premium over the current book value for which stock can be repurchased.

+ References

No definition available.

+ Details

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- Details

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

+ Details

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Data Type:	num:perShareItemType
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Period Type:	instant

- Definition

Number of warrants or rights outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Article 4

+ Details

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- Definition

Number of shares of common stock issued as dividends during the period. Excludes stock splits.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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Shareholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended
	Jun. 30, 2014	May 15, 2014	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2013
Capital Unit [Line Items]
Dividends, Paid-in-kind, Percent		10.00%cubi_DividendsStockPercent
Stock dividend, shares	2,429,375us-gaap_CommonStockDividendsShares
Premium of outstanding shares					20.00%
Warrants outstanding to purchase common stock			635,274	635,820
Maximum
Capital Unit [Line Items]
Acquisition of outstanding shares percentage					5.00%
Purchase price of common stock			73.01	73.01
Minimum
Capital Unit [Line Items]
Purchase price of common stock			9.55	9.55