Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest and dividend income
Interest and fees on loans	$ 195,125	$ 178,720	$ 170,327
Interest and dividends on securities:
Interest	25,141	24,827	25,969
Dividends	481	473	753
Other interest income	250	126	79
Total interest and dividend income	220,997	204,146	197,128
Interest expense
Deposits	33,350	30,336	30,044
Other interest expense	20,561	19,390	19,510
Total interest expense	53,911	49,726	49,554
Net interest income	167,086	154,420	147,574
Benefit for loan losses	0	(956)	(6,021)
Net interest income after benefit for loan losses	167,086	155,376	153,595
Non-interest income
Banking services fee income	3,758	3,805	3,394
Net gain on sale of loans	584	422	67
Net gain on sale of securities	1,524	167	2,875
Net gain on sale of buildings	48,018	6,537	0
Net loss from fair value adjustments	(3,434)	(1,841)	(2,568)
Federal Home Loan Bank of New York stock dividends	2,664	1,969	1,898
Gains from life insurance proceeds	460	0	0
Bank owned life insurance	2,797	2,880	3,050
Other income	1,165	1,780	1,527
Total non-interest income	57,536	15,719	10,243
Non-interest expense
Salaries and employee benefits	60,825	53,093	48,998
Occupancy and equipment	9,848	10,206	7,998
Professional services	7,720	7,074	5,982
FDIC deposit insurance	2,993	3,236	2,707
Data processing	4,364	4,471	4,194
Depreciation and amortization of bank premises and equipment	4,450	3,579	2,813
Other real estate owned / foreclosure expense	1,307	942	1,338
Prepayment penalty on borrowings	10,356	0	5,187
Other operating expenses	16,740	15,118	11,809
Total non-interest expense	118,603	97,719	91,026
Income before income taxes	106,019	73,376	72,812
Provision for income taxes
Federal	33,580	21,843	20,912
State and local	7,523	5,324	7,661
Total provision for income taxes	41,103	27,167	28,573
Net income	$ 64,916	$ 46,209	$ 44,239
Basic earnings per common share (in dollars per share)	$ 2.24	$ 1.59	$ 1.49
Diluted earnings per common share (in dollars per share)	$ 2.24	$ 1.59	$ 1.48