Document and Entity Information (USD $)	6 Months Ended
	Jun. 30, 2013	Aug. 07, 2013	Jun. 30, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	DIME COMMUNITY BANCSHARES INC
Entity Central Index Key	0001005409
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	No
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 408,000,000
Entity Common Stock, Shares Outstanding		36,462,076
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013