MERGER - Hypothetical Legacy Dime Ownership (Details) shares in Thousands	Jan. 31, 2021 shares
MERGER
Number of Bridge Outstanding Shares	63,620
Percentage Ownership	100.00%
Bridge shareholders
MERGER
Number of Bridge Outstanding Shares	30,853
Percentage Ownership	48.50%
Legacy Dime shareholders
MERGER
Number of Bridge Outstanding Shares	32,767
Percentage Ownership	51.50%