Business Combinations (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Jul. 01, 2014
Business Combinations (Details) [Line Items]
Common Stock Conversion Ratio Shares (in Shares)	2.6
Goodwill Recorded in Business Acquisition	$ 129,105,000	$ 129,105,000
Finite Lived Intangible Asset Acquired		5,308,000
Business Combination, Consideration Transferred	264,231
Finite-Lived Intangible Asset, Useful Life	10 years
Business Combination, Acquisition Related Costs	10,600,000
Legacy ConnectOne [Member]
Business Combinations (Details) [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		1,500,000,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Non Current Loans		1,200,000,000
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Non Current Deposits		$ 1,100,000,000