Subsequent Event - Completion of Merger	6 Months Ended
Jun. 30, 2014
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Note 3. Subsequent Event – Completion of Merger On January 20, 2014, the Parent Corporation entered into an Agreement and Plan of Merger (the “Merger Agreement”) with ConnectOne Bancorp, Inc., a New Jersey corporation (“ConnectOne Bancorp”). Effective July 1, 2014 (the “Effective Time”), the Parent Corporation completed the merger contemplated by the Merger Agreement (the “Merger”) with legacy ConnectOne Bancorp, Inc., a New Jersey corporation (“Legacy ConnectOne”). At closing, Legacy ConnectOne merged with and into the Parent Corporation, with the Parent Corporation as the surviving corporation. Also at closing, the Parent Corporation changed its name from “Center Bancorp, Inc.” to “ConnectOne Bancorp, Inc.” and changed its NASDAQ trading symbol to “CNOB” from “CNBC.” Pursuant to the Merger Agreement, holders of Legacy ConnectOne common stock, 0 par value per share (the “Legacy ConnectOne Common Stock”), received 2.6 shares of common stock of the Parent Corporarion, 0 par value per share (the “Company Common Stock”), for each share of Legacy ConnectOne Common Stock held immediately prior to the effective time of the Merger, with cash to be paid in lieu of fractional shares. Each outstanding share of Company Common Stock remained outstanding and was unaffected by the Merger. Each option granted by Legacy ConnectOne to purchase shares of Legacy ConnectOne Common Stock was converted into an option to purchase Company Common Stock on the same terms and conditions as were applicable prior to the Merger (taking into account any acceleration or vesting by reason of the consummation of the Merger and its related transactions), subject to adjustment of the exercise price and the number of shares of Company Common Stock issuable upon exercise of such option based on the 2.6 exchange ratio. Immediately following the Merger, Union Center National Bank, a bank organized pursuant to the laws of the United States, and a wholly owned subsidiary of the Parent Corporation (“UNCB”), merged (the “Bank Merger”) with and into ConnectOne Bank, a New Jersey state-chartered commercial bank and a wholly owned subsidiary of Legacy ConnectOne, with ConnectOne Bank as the surviving entity (the “Bank”). The Bank will now conduct business only in the name of and under the brand of ConnectOne. Given the initial accounting for this business combination is incomplete, management is not yet able to disclose the preliminary fair value of the assets acquired and liabilities assumed.

Subsequent Event - Completion of Merger

6 Months Ended

Jun. 30, 2014

Note 3. Subsequent Event – Completion of Merger

On January 20, 2014, the Parent Corporation entered into an Agreement and Plan of Merger (the “Merger Agreement”) with ConnectOne Bancorp, Inc., a New Jersey corporation (“ConnectOne Bancorp”). Effective July 1, 2014 (the “Effective Time”), the Parent Corporation completed the merger contemplated by the Merger Agreement (the “Merger”) with legacy ConnectOne Bancorp, Inc., a New Jersey corporation (“Legacy ConnectOne”). At closing, Legacy ConnectOne merged with and into the Parent Corporation, with the Parent Corporation as the surviving corporation. Also at closing, the Parent Corporation changed its name from “Center Bancorp, Inc.” to “ConnectOne Bancorp, Inc.” and changed its NASDAQ trading symbol to “CNOB” from “CNBC.”

Pursuant to the Merger Agreement, holders of Legacy ConnectOne common stock, 0 par value per share (the “Legacy ConnectOne Common Stock”), received 2.6 shares of common stock of the Parent Corporarion, 0 par value per share (the “Company Common Stock”), for each share of Legacy ConnectOne Common Stock held immediately prior to the effective time of the Merger, with cash to be paid in lieu of fractional shares. Each outstanding share of Company Common Stock remained outstanding and was unaffected by the Merger. Each option granted by Legacy ConnectOne to purchase shares of Legacy ConnectOne Common Stock was converted into an option to purchase Company Common Stock on the same terms and conditions as were applicable prior to the Merger (taking into account any acceleration or vesting by reason of the consummation of the Merger and its related transactions), subject to adjustment of the exercise price and the number of shares of Company Common Stock issuable upon exercise of such option based on the 2.6 exchange ratio.

Immediately following the Merger, Union Center National Bank, a bank organized pursuant to the laws of the United States, and a wholly owned subsidiary of the Parent Corporation (“UNCB”), merged (the “Bank Merger”) with and into ConnectOne Bank, a New Jersey state-chartered commercial bank and a wholly owned subsidiary of Legacy ConnectOne, with ConnectOne Bank as the surviving entity (the “Bank”). The Bank will now conduct business only in the name of and under the brand of ConnectOne.

Given the initial accounting for this business combination is incomplete, management is not yet able to disclose the preliminary fair value of the assets acquired and liabilities assumed.