Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 28,967	$ 26,288
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Gain on sales of mortgage loans	(154)
Net gains on sales of securities	(61)	(302)
Net (gain) loss on equity securities	(76)	47
Provision for loan losses	700	900
Deferred income taxes	(593)	(1,270)
Net depreciation and amortization	(1,693)	1,116
Decrease (increase) in accrued interest receivable	1,131	(1,699)
(Increase) decrease in other assets	(1,037)	1,542
Increase in other liabilities	2,029	4,825
Net cash provided by operating activities	29,213	31,447
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from redemptions of Federal Home Loan Bank of Boston stock	13,801	13,619
Purchase of Federal Home Loan Bank of Boston stock	(9,852)	(14,583)
Proceeds from calls/maturities of securities available-for-sale	115,574	111,922
Proceeds from sales of securities available-for-sale	16,285	27,517
Purchase of securities available-for-sale	(57,005)	(108,871)
Proceeds from calls/maturities of securities held-to-maturity	313,358	187,009
Purchase of securities held-to-maturity	(427,124)	(358,824)
Proceeds from sales of securities held-to-maturity	1,194
Proceeds from life insurance policies	5,124	375
Net increase in loans	(98,915)	(83,967)
Proceeds from sales of portfolio loans	8,871
Capital expenditures	(9,962)	(2,900)
Net cash used in investing activities	(128,651)	(228,703)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net decrease in time deposits	(27,505)	(45,475)
Net decrease (increase) in demand, savings, money market and NOW deposits	(39,606)	92,915
Cash dividends	(1,654)	(1,652)
Net increase (decrease) in securities sold under agreements to repurchase	152,995	(18,500)
Net increase in other borrowed funds	6,810	24,828
Net cash provided by financing activities	91,040	52,116
Net decrease in cash and cash equivalents	(8,398)	(145,140)
Cash and cash equivalents at beginning of period	342,503	356,430
Cash and cash equivalents at end of period	334,105	211,290
Cash paid (received) during the period for:
Interest	48,127	30,680
Income tax refunds	(6,604)
Income taxes		590
Change in unrealized gains (losses) on securities available-for-sale, net of taxes	(156)	195
Change in unrealized losses on securities transferred to held-to-maturity, net of taxes	574	872
Pension liability adjustment, net of taxes	$ 790	877
Change in due to (from) to broker		$ 897