Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 16,994	$ 15,093
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	3,441	2,370
Allocation of ESOP stock	461	440
Stock awards	1,181	985
Amortization of servicing asset	125	276
Net premium amortization in excess of discount accretion on securities	1,295	1,583
Net amortization of deferred costs and discounts on loans	(117)	86
Amortization of core deposit intangible	319	8
Net accretion/amortization of purchase accounting adjustments	(3,068)	(140)
Provision for loan losses	2,113	975
Net loss (gain) on sale of other real estate owned	208	(84)
Net loss on sale of fixed assets	38
Net loss on sales of available-for-sale securities	12
Net gain on sales of loans	(696)	(637)
Proceeds from sales of mortgage loans held for sale	37,687	42,787
Mortgage loans originated for sale	(25,079)	(40,255)
Increase in value of Bank Owned Life Insurance	(1,520)	(1,158)
Increase in interest and dividends receivable	(24)	(50)
Decrease in other assets	8,464	1,858
Increase (decrease) in other liabilities	4,072	(2,624)
Total adjustments	28,912	6,420
Net cash provided by operating activities	45,906	21,513
Cash flows from investing activities:
Net decrease (increase) in loans receivable	68,358	(107,776)
Proceeds from sale of high risk loans	12,797
Purchase of loans receivable	(12,942)	(22,054)
Purchase of investment securities held-to-maturity	(2,030)	(9,973)
Proceeds from maturities and calls of investment securities held-to-maturity	53,552	35,861
Proceeds from sales of securities available-for-sale	59,870
Principal repayments on mortgage-backed securities held-to-maturity	52,110	46,791
Proceeds from Bank Owned Life Insurance	310
Decrease in Federal Home Loan Bank of New York stock	8,471	3,514
Proceeds from sales of other real estate owned	3,193	1,722
Purchases of premises and equipment	(4,580)	(3,076)
Cash (received) acquired, net of cash consideration paid for acquisition	(477)	3,703
Cash acquired, net of cash paid for branch acquisition	16,727
Net cash provided by (used in) investing activities	255,359	(51,288)
Cash flows from financing activities:
Increase in deposits	143,104	124,290
Decrease in short-term borrowings	(175,821)	(107,619)
Proceeds from Federal Home Loan Bank advances	55,000	40,000
Net proceeds from issuance of subordinated notes	33,899
Repayments of Federal Home Loan Bank advances	(73,678)	(1,232)
Repayments of other borrowings	(10,000)
Increase in advances by borrowers for taxes and insurance	237	1,485
Exercise of stock options	2,648	250
Purchase of treasury stock		(6,457)
Dividends paid	(8,789)	(6,496)
Tax (expense) benefit of stock plans	(228)	13
Net cash (used in) provided by financing activities	(33,628)	44,234
Net increase in cash and due from banks	267,637	14,459
Cash and due from banks at beginning of period	43,946	36,117
Cash and due from banks at end of period	311,583	50,576
Supplemental Disclosure of Cash Flow Information:
Interest	8,932	6,629
Income taxes	7,064	7,862
Non-cash activities:
Accretion of unrealized loss on securities reclassified to held-to-maturity	1,054	1,017
Loans charged-off, net	1,949	654
Transfer of loans receivable to other real estate owned	1,667
Non-cash assets acquired:
Securities	212,156	6,758
Federal Home Loan Bank of New York stock	6,782	314
Loans	1,157,753	121,196
Premises & equipment	21,723
Other real estate owned	1,996	257
Deferred tax asset	21,664	3,244
Other assets	61,793	8,509
Goodwill and other intangible assets, net	68,179	2,122
Total non-cash assets acquired	1,552,046	142,400
Liabilities assumed:
Deposits	1,248,367	123,346
Federal Home Loan Bank advances	124,466	6,800
Other liabilities	12,835	309
Total liabilities assumed	$ 1,385,668	$ 130,455