Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 33,325	$ 30,609
Adjustments to reconcile net income to net cash provided by operating activities:
Net (gain) loss on equity securities	(12)	43
(Credit) provision for loan losses	(750)	3,675
Deferred income taxes	(1,129)	(1,487)
Net depreciation and amortization (accretion)	1,872	(1,167)
Increase in accrued interest receivable	(130)	(113)
Decrease in other assets	928	3,897
Increase in other liabilities	8,187	3,396
Net cash provided by operating activities	42,291	38,853
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from redemptions of Federal Home Loan Bank of Boston stock	1,767	10,836
Purchase of Federal Home Loan Bank of Boston stock		(4,726)
Proceeds from calls/maturities of securities available-for-sale	95,808	57,493
Purchase of securities available-for-sale	(16,155)	(87,751)
Proceeds from calls/maturities of securities held-to-maturity	717,320	596,043
Purchase of securities held-to-maturity	(1,418,979)	(638,023)
Net decrease (increase) in loans	70,407	(563,850)
Bank owned life insurance purchases		(6,000)
Capital expenditures	(5,783)	(5,873)
Net cash used in investing activities	(555,615)	(641,851)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net (decrease) increase in time deposits	(197,847)	26,419
Net increase in demand, savings, money market and NOW deposits	950,002	985,941
Cash dividends	(2,493)	(1,753)
Net increase (decrease) in securities sold under agreements to repurchase	37,871	(35,015)
Net decrease in other borrowed funds	(58,223)	(218,707)
Net cash provided by financing activities	729,310	756,885
Net increase (decrease) in cash and cash equivalents	215,986	153,887
Cash and cash equivalents at beginning of period	374,000	258,693
Cash and cash equivalents at end of period	589,986	412,580
Cash paid during the period for:
Interest	17,891	34,384
Income taxes	4,980	1,750
Change in unrealized gains (losses) on securities available-for-sale, net of taxes	932	445
Change in unrealized losses on securities transferred to held-to-maturity, net of taxes	391	471
Pension liability adjustment, net of taxes	1,218	1,081
Change in due to broker		$ 9,977
Dividends declared and not paid	$ 831