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Fair Value Measurements (Estimated Fair Values of the Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financial assets:
Trading securities	$ 6,799	$ 6,422
Securities available-for-sale	640,212	771,239
Estimated Fair Value	3,965	3,691
Carrying Value
Financial assets:
Cash and cash equivalents	75,785	76,709
Trading securities	6,799	6,422
Securities available-for-sale	640,212	771,239
Estimated Fair Value	3,921	3,609
Federal Home Loan Bank of New York stock, at cost	25,353	29,219
Loans Held-for-sale, Fair Value Disclosure	325
Net loans held-for-investment	2,178,118	1,916,703
Financial liabilities:
Deposits	1,980,099	1,620,665
Repurchase agreements, Federal Home Loan Bank advances and and other borrowings	579,078	778,658
Advance payments by borrowers	9,696	7,792
Estimated Fair Value
Financial assets:
Cash and cash equivalents	75,785	76,709
Trading securities	6,799	6,422
Securities available-for-sale	640,212	771,239
Estimated Fair Value	3,965	3,691
Federal Home Loan Bank of New York stock, at cost	25,353	29,219
Loans Held-for-sale, Fair Value Disclosure	0
Net loans held-for-investment	2,203,946	1,949,511
Financial liabilities:
Deposits	1,984,059	1,622,536
Repurchase agreements, Federal Home Loan Bank advances and and other borrowings	581,642	781,196
Advance payments by borrowers	9,696	7,792
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	75,785	76,709
Trading securities	6,799	6,422
Securities available-for-sale	329	410
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Securities available-for-sale	639,883	770,829
Estimated Fair Value	3,965	3,691
Federal Home Loan Bank of New York stock, at cost	25,353	29,219
Loans Held-for-sale, Fair Value Disclosure	0
Net loans held-for-investment	0
Financial liabilities:
Deposits	1,984,059	1,622,536
Repurchase agreements, Federal Home Loan Bank advances and and other borrowings	581,642	781,196
Advance payments by borrowers	9,696	7,792
Estimated Fair Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Loans Held-for-sale, Fair Value Disclosure	325
Net loans held-for-investment	$ 2,203,946	$ 1,949,511

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