Benefit Plans (Details 13) (Astoria Federal, Pension Benefits, USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Benefit Plans
Unrealized gain(loss)	$ 313,000	$ 517,000
Fair Value Measurements Recurring | PRIAC Pooled Separate Accounts | International Equity Securities
Benefit Plans
Securities (as a percent)	11.00%	12.00%
Fair Value Measurements Recurring | PRIAC Pooled Separate Accounts | Large Cap Equity Securities
Benefit Plans
Securities (as a percent)	41.00%	39.00%
Fair Value Measurements Recurring | PRIAC Pooled Separate Accounts | Small Cap Equity Securities
Benefit Plans
Securities (as a percent)	8.00%	8.00%
Fair Value Measurements Recurring | PRIAC Pooled Separate Accounts | Mid Cap Equity Securities
Benefit Plans
Securities (as a percent)	5.00%	6.00%
Fair Value Measurements Recurring | PRIAC Pooled Separate Accounts | Debt securities
Benefit Plans
Securities (as a percent)	35.00%	35.00%