Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 15,093,000	$ 14,988,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	2,370,000	2,161,000
Allocation of ESOP stock	440,000	431,000
Stock awards	985,000	678,000
Amortization of servicing asset	276,000	874,000
Net premium amortization in excess of discount accretion on securities	1,583,000	2,161,000
Net amortization of deferred costs and discounts on loans	86,000	61,000
Amortization of core deposit intangible	8,000
Provision for loan losses	975,000	1,805,000
Net gain on sale of other real estate owned	(84,000)	(151,000)
Net gain on sales of investment securities available-for-sale	0	(938,000)
Net gain on sales of loans	(637,000)	(577,000)
Proceeds from sales of mortgage loans held for sale	42,787,000	31,313,000
Mortgage loans originated for sale	(40,255,000)	(33,320,000)
Increase in value of Bank Owned Life Insurance	(1,158,000)	(1,097,000)
Increase in interest and dividends receivable	(50,000)	(199,000)
Decrease in other assets	1,858,000	136,000
Decrease in other liabilities	(2,624,000)	(3,368,000)
Total adjustments	6,560,000	(30,000)
Net cash provided by operating activities	21,653,000	14,958,000
Cash flows from investing activities:
Net increase in loans receivable	(107,916,000)	(76,194,000)
Purchase of loans receivable	(22,054,000)	(20,574,000)
Purchase of investment securities available-for-sale	(9,973,000)	(10,616,000)
Purchase of mortgage-backed securities held-to-maturity		(35,203,000)
Purchase of investment securities held-to-maturity		(5,003,000)
Proceeds from maturities of investment securities available-for-sale		5,706,000
Proceeds from sale of investment securities available-for-sale		7,713,000
Proceeds from maturities of investment securities held-to-maturity	35,861,000	25,001,000
Principal repayments on mortgage-backed securities held-to-maturity	46,791,000	42,148,000
Decrease (increase) in Federal Home Loan Bank of New York stock	3,514,000	(267,000)
Proceeds from sales of other real estate owned	1,722,000	2,366,000
Purchases of premises and equipment	(3,076,000)	(3,167,000)
Cash received, net of cash consideration paid for acquisition	3,703,000
Net cash used in investing activities	(51,428,000)	(68,090,000)
Cash flows from financing activities:
Increase in deposits	124,290,000	34,464,000
Decrease in short-term borrowings	(107,619,000)	(91,651,000)
Proceeds from Federal Home Loan Bank advances	40,000,000	205,000,000
Repayments of Federal Home Loan Bank advances	(1,232,000)	(90,000,000)
Increase in advances by borrowers for taxes and insurance	1,485,000	245,000
Exercise of stock options	250,000	349,000
Purchase of treasury stock	(6,457,000)	(5,562,000)
Dividends paid	(6,496,000)	(6,071,000)
Tax benefit of stock plans	13,000	57,000
Net cash provided by financing activities	44,234,000	46,831,000
Net increase (decrease) in cash and due from banks	14,459,000	(6,301,000)
Cash and due from banks at beginning of period	36,117,000	33,958,000
Cash and due from banks at end of period	50,576,000	27,657,000
Supplemental Disclosure of Cash Flow Information:
Interest	6,629,000	5,197,000
Income taxes	7,862,000	9,001,000
Non-cash activities:
Loans charged-off, net	654,000	6,425,000
Transfer of loans receivable to other real estate owned		$ 4,336,000
Non-cash assets acquired:
Securities	6,758,000
Federal Home Loan Bank of New York stock	314,000
Loans	121,196,000
Other real estate owned	257,000
Deferred tax asset	3,244,000
Other assets	8,509,000
Goodwill and other intangible assets, net	2,122,000
Total non-cash assets acquired	142,400,000
Liabilities assumed:
Deposits	123,346,000
Federal Home Loan Bank advances	6,800,000
Other liabilities	309,000
Total liabilities assumed	130,455,000
Total consideration for acquisition	$ 11,945,000