Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 44,198	$ 50,187
Federal funds sold and interest-bearing deposits in other banks	217,424	157,579
Total cash and cash equivalents	261,622	207,766
Short-term investments	31,364	18,351
Securities available-for-sale, amortized cost $1,208,527 and $1,244,972, respectively	1,229,099	1,258,676
Securities held-to-maturity, fair value $290,781and $184,822, respectively	284,490	179,368
Federal Home Loan Bank of Boston stock, at cost	15,146	15,531
Loans, net:
Commercial and industrial	78,567	82,404
Construction and land development	38,318	56,819
Commercial real estate	562,252	487,495
Residential real estate	262,426	239,307
Home equity	116,699	110,786
Consumer and other	6,661	7,681
Total loans, net	1,064,923	984,492
Less: allowance for loan losses	18,658	16,574
Net loans	1,046,265	967,918
Bank premises and equipment	23,416	21,757
Accrued interest receivable	5,866	6,022
Goodwill	2,714	2,714
Other assets	65,835	65,122
Total assets	2,965,817	2,743,225
Deposits:
Demand deposits	406,681	365,854
Savings and NOW deposits	832,525	708,988
Money Market Accounts	672,447	616,241
Time deposits	431,630	433,501
Total deposits	2,343,283	2,124,584
Securities sold under agreements to repurchase	176,060	143,320
Other borrowed funds	184,144	244,143
Subordinated debentures	36,083	36,083
Due to broker	10,750
Other liabilities	37,385	34,446
Total liabilities	2,787,705	2,582,576
Stockholders' Equity
Preferred stock - $1.00 par value; 100,000 shares authorized; no shares issued and outstanding
Additional paid-in capital	11,718	11,587
Retained earnings	158,661	146,039
Total stockholder's Equity	175,927	163,168
Unrealized gains on securities available-for-sale, net of taxes	12,536	8,319
Pension liability, net of taxes	(10,351)	(10,838)
Total accumulated other comprehensive income (loss), net of taxes	2,185	(2,519)
Total stockholders' equity	178,112	160,649
Total liabilities and stockholders' equity	2,965,817	2,743,225
Class A Common Stock
Stockholders' Equity
Common stock value	3,562	3,548
Total stockholders' equity	3,562	3,548
Class B Common Stock
Stockholders' Equity
Common stock value	1,986	1,994
Total stockholders' equity	$ 1,986	$ 1,994