Business Combinations (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	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		$ 12,400,000
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