|
Document and Entity Information (USD $)
|
9 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2012
|
Nov. 07, 2012
|
Jun. 30, 2011
|
|
| 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 | 35,606,696 | ||
| Document Fiscal Year Focus | 2012 | ||
| Document Fiscal Period Focus | Q3 | ||
| Document Type | 10-Q | ||
| Amendment Flag | false | ||
| Document Period End Date | Sep. 30, 2012 |