Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 74,787	$ 62,400
Federal funds sold and interest-bearing deposits in other banks	153,374	173,751
Total cash and cash equivalents	228,161	236,151
Short-term investments		3,183
Securities available-for-sale, amortized cost $411,709 and $500,220, respectively	411,340	499,297
Securities held-to-maturity, fair value $1,706,840 and $ 1,635,808, respectively	1,722,875	1,653,986
Federal Home Loan Bank of Boston, stock at cost	25,588	21,042
Loans, net:
Construction and land development	14,159	14,928
Commercial and industrial	650,542	612,503
Municipal	127,259	135,418
Commercial real estate	736,603	696,173
Residential real estate	264,744	241,357
Home equity	229,274	211,857
Overdrafts	518	684
Total loans, net	2,033,799	1,923,933
Less: allowance for loan losses	25,289	24,406
Net loans	2,008,510	1,899,527
Bank premises and equipment	23,177	23,417
Accrued interest receivable	10,309	9,645
Goodwill	2,714	2,714
Other assets	116,563	113,646
Total assets	4,549,237	4,462,608
Deposits:
Demand deposits	687,219	689,286
Savings and NOW deposits	1,409,327	1,304,394
Money market accounts	897,241	1,181,179
Time deposits	575,410	478,359
Total deposits	3,569,197	3,653,218
Securities sold under agreements to repurchase	167,340	182,280
Other borrowed funds	455,500	293,000
Subordinated debentures	36,083	36,083
Due to broker	6,854
Other liabilities	59,638	57,986
Total liabilities	4,294,612	4,222,567
Stockholders' Equity
Preferred Stock - $1.00 par value; 100,000 shares authorized; no shares issued and outstanding
Additional paid-in capital	12,292	12,292
Retained earnings	256,718	243,565
Stockholders' equity before adjustment of accumulated other comprehensive income (loss)	274,578	261,425
Unrealized losses on securities available-for-sale, net of taxes	(234)	(567)
Unrealized losses on securities transferred to held-to-maturity, net of taxes	(3,451)	(4,084)
Pension liability, net of taxes	(16,268)	(16,733)
Total accumulated other comprehensive loss, net of taxes	(19,953)	(21,384)
Total stockholders' equity	254,625	240,041
Total liabilities and stockholders' equity	4,549,237	4,462,608
Consumer [Member]
Loans, net:
Consumer	10,700	11,013
Total loans, net	11,218	11,697
Less: allowance for loan losses	195	582
Class A Common Stock [Member]
Stockholders' Equity
Common stock value	3,604	3,601
Total stockholders' equity	3,604	3,601
Class B Common Stock [Member]
Stockholders' Equity
Common stock value	1,964	1,967
Total stockholders' equity	$ 1,964	$ 1,967