Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 43,266	$ 50,187
Federal funds sold and interest-bearing deposits in other banks	87,996	157,579
Total cash and cash equivalents	131,262	207,766
Short-term investments	13,303	18,351
Securities available-for-sale, amortized cost $1,297,282 and $1,244,972, respectively	1,313,839	1,258,676
Securities held-to-maturity, fair value $321,917 and $184,822, respectively	316,223	179,368
Federal Home Loan Bank of Boston stock, at cost	15,146	15,531
Loans, net:
Commercial and industrial	81,882	82,404
Construction and land development	36,937	56,819
Commercial real estate	502,413	487,495
Residential real estate	249,981	239,307
Home equity	109,817	110,786
Consumer and other	6,946	7,681
Total loans, net	987,976	984,492
Less: allowance for loan losses	17,434	16,574
Net loans	970,542	967,918
Bank premises and equipment	21,848	21,757
Accrued interest receivable	6,094	6,022
Goodwill	2,714	2,714
Core deposit intangible	23	120
Other assets	64,978	65,002
Total assets	2,855,972	2,743,225
Deposits:
Demand deposits	360,308	365,854
Savings and NOW deposits	746,741	708,988
Money market accounts	645,143	616,241
Time deposits	439,474	433,501
Total deposits	2,191,666	2,124,584
Securities sold under agreements to repurchase	142,230	143,320
Other borrowed funds	241,143	244,143
Subordinated debentures	36,083	36,083
Due to broker	44,423	0
Other liabilities	34,490	34,446
Total liabilities	2,690,035	2,582,576
Stockholders' Equity
Preferred stock - $1.00 par value; 100,000 shares authorized; no shares issued and outstanding
Additional paid-in capital	11,708	11,587
Retained earnings	149,302	146,039
Total stockholder's Equity	166,558	163,168
Unrealized gains on securities available-for-sale, net of taxes	10,055	8,319
Pension liability, net of taxes	(10,676)	(10,838)
Total accumulated other comprehensive income(loss), net of taxes	(621)	(2,519)
Total stockholders' equity	165,937	160,649
Total liabilities and stockholders' equity	2,855,972	2,743,225
Class A common stock
Stockholders' Equity
Class A common stock, $1.00 par value per share; authorized 10,000,000 shares; issued 3,556,429 shares and 3,548,317 shares, respectively	3,556	3,548
Total stockholders' equity	3,556	3,548
Class B common stock
Stockholders' Equity
Class A common stock, $1.00 par value per share; authorized 10,000,000 shares; issued 3,556,429 shares and 3,548,317 shares, respectively	1,992	1,994
Total stockholders' equity	$ 1,992	$ 1,994