Organization	6 Months Ended
Jun. 30, 2011
Organization [Abstract]
Organization	1. Organization Hudson City Bancorp, Inc. (“Hudson City Bancorp” or the “Company”) is a Delaware corporation and is the savings and loan holding company for Hudson City Savings Bank and its subsidiaries (“Hudson City Savings” or the “Bank”). On July 21, 2010, President Obama signed the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Reform Act”). Pursuant to the Reform Act, the Office of Thrift Supervision (“OTS”) effectively merged into the Office of the Comptroller of the Currency (“OCC”), with the OCC assuming all functions and authority from the OTS relating to federally chartered savings banks, and the Federal Reserve Board (the “FRB”) assuming all functions and authority from the OTS relating to savings and loan holding companies. Hudson City Savings is now regulated by the OCC and the Company is now regulated by the FRB.

Organization

6 Months Ended

Jun. 30, 2011

1. Organization

Hudson City Bancorp, Inc. (“Hudson City Bancorp” or the “Company”) is a Delaware corporation and is the savings and loan holding company for Hudson City Savings Bank and its subsidiaries (“Hudson City Savings” or the “Bank”).

On July 21, 2010, President Obama signed the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Reform Act”). Pursuant to the Reform Act, the Office of Thrift Supervision (“OTS”) effectively merged into the Office of the Comptroller of the Currency (“OCC”), with the OCC assuming all functions and authority from the OTS relating to federally chartered savings banks, and the Federal Reserve Board (the “FRB”) assuming all functions and authority from the OTS relating to savings and loan holding companies. Hudson City Savings is now regulated by the OCC and the Company is now regulated by the FRB.