Consolidated Statements of Cash Flows (unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 11,549,000	$ 10,884,000
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Gain on sales of mortgage loans	(798,000)	(517,000)
Net gains on sales of securities	(45,000)	(118,000)
Provision for loan losses	800,000	200,000
Deferred income taxes	(1,792,000)	(819,000)
Net depreciation and amortization	1,575,000	1,639,000
Increase in accrued interest receivable	(712,000)	(1,040,000)
Increase in other assets	(3,428,000)	(13,357,000)
Increase in other liabilities	1,069,000	632,000
Net cash provided by (used in) operating activities	8,218,000	(2,496,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of short-term investments	(8,000)	(8,000)
Proceeds from redemptions of Federal Home Loan Bank of Boston stock	4,898,000
Purchase of Federal Home Loan Bank of Boston stock	(2,177,000)
Proceeds from calls/maturities of securities available-for-sale	130,513,000	91,052,000
Proceeds from sales of securities available-for-sale	1,946,000	21,215,000
Purchase of securities available-for-sale	(287,834,000)	(115,690,000)
Proceeds from calls/maturities of securities held-to-maturity	213,337,000	169,457,000
Proceeds from sales of securities held-to-maturity	192,000	0
Purchase of securities held-to-maturity	(345,692,000)	(443,705,000)
Net increase in loans	(132,182,000)	(249,003,000)
Proceeds from sales of portfolio loans	50,220,000	35,941,000
Capital expenditures	(835,000)	(1,520,000)
Net cash used in investing activities	(367,622,000)	(492,261,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net decrease in time deposits	(12,899,000)	139,000
Net increase in demand, savings, money market and NOW deposits	156,771,000	113,959,000
Cash dividends	(1,101,000)	(1,099,000)
Net increase in securities sold under agreements to repurchase	19,915,000	71,470,000
Net decrease in other borrowed funds	63,000,000	90,000,000
Net cash provided by financing activities	225,686,000	274,469,000
Net decrease in cash and cash equivalents	(133,718,000)	(220,288,000)
Cash and cash equivalents at beginning of period	220,724,000	305,357,000
Cash and cash equivalents at end of period	87,006,000	85,069,000
Cash paid during the period for:
Interest	10,893,000	9,646,000
Income taxes	2,110,000	2,730,000
Change in unrealized gains (losses) on securities available-for-sale, net of taxes	(38,000)	(100,000)
Change in unrealized losses on securities transferred to held-to-maturity, net of taxes	1,747,000	1,762,000
Pension liability adjustment, net of taxes	485,000	426,000
Change in due to (from) to broker	3,180,000	(8,764,000)
Loans transferred to other real estate owned		$ 1,916,000
Transfer of loans to loans held-for-sale	$ 12,403,000