Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 36,079	$ 36,069
Short-term investments	284,370	398,848
Total cash and cash equivalents	320,449	434,917
Investment securities available-for-sale	694,151	745,822
Equity securities held-for-trading	0	526
Total investment securities	694,151	746,348
Total loans and leases	7,020,275	7,269,553
Allowance for loan and lease losses	(106,474)	(114,379)
Net loans and leases	6,913,801	7,155,174
Restricted equity securities	31,627	49,786
Premises and equipment, net of accumulated depreciation of $84,191 and $82,233, respectively	71,240	71,568
Right-of-use asset operating leases	22,682	24,143
Deferred tax asset	41,324	40,129
Goodwill	160,427	160,427
Identified intangible assets, net of accumulated amortization of $39,212 and $38,752, respectively	2,692	3,152
Other real estate owned ("OREO") and repossessed assets, net	372	6,515
Other assets	203,199	250,265
Total assets	8,461,964	8,942,424
Deposits:
Demand checking accounts	1,926,713	1,592,205
Interest-bearing deposits	4,967,988	5,318,491
Total deposits	6,894,701	6,910,696
Borrowed funds:
Advances from the Federal Home Loan Bank of Boston ("FHLBB")	204,154	648,849
Subordinated debentures and notes	83,821	83,746
Other borrowed funds	75,039	87,652
Total borrowed funds	363,014	820,247
Operating lease liabilities	22,682	24,143
Mortgagors' escrow accounts	6,231	5,901
Reserve for unfunded credits	13,142	13,071
Accrued expenses and other liabilities	189,942	226,588
Total liabilities	7,489,712	8,000,646
Commitments and contingencies
Stockholders' Equity:
Common stock, $0.01 par value; 200,000,000 shares authorized; 85,177,172 shares issued and 85,177,172 shares issued, respectively	852	852
Additional paid-in capital	738,557	737,178
Retained earnings, partially restricted	304,466	264,892
Accumulated other comprehensive income	6,089	16,490
Treasury stock, at cost; 6,536,478 shares and 6,525,783 shares, respectively	(77,493)	(77,343)
Unallocated common stock held by Employee Stock Ownership Plan ("ESOP"); 37,890 shares and 51,114 shares, respectively	(219)	(291)
Total stockholders' equity	972,252	941,778
Total liabilities and stockholders' equity	8,461,964	8,942,424
Commercial real estate loans
ASSETS
Total loans and leases	3,815,581	3,823,826
Commercial loans and leases
ASSETS
Total loans and leases	2,038,851	2,274,899
Consumer loans
ASSETS
Total loans and leases	$ 1,165,843	$ 1,170,828