Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Property, Plant and Equipment

Premises and equipment are carried at cost, less accumulated depreciation. Depreciation of premises and equipment is computed on a straight-line basis over the estimated useful lives of the assets, as follows:

	Minimum		Maximum
Building and Improvements	5	-	40	years
Leasehold improvements	5	-	20	years (or term or lease, if shorter)
Fixtures and equipment	5	-	10	years
Data processing and software	3	-	7	years

A summary of premises and equipment follows:

	At December 31,
(In thousands)	2017			2016
Land	$	11,302		$	12,595
Buildings and improvements	80,646			83,903
Leasehold improvements	82,067			83,971
Fixtures and equipment	76,665			76,146
Data processing and software	234,667			220,002
Total premises and equipment	485,347			476,617
Less: Accumulated depreciation and amortization	(355,346		)	(339,204		)
Premises and equipment, net	$	130,001		$	137,413

Depreciation and amortization of premises and equipment was $33.1 million, $30.8 million, and $28.4 million for the years ended December 31, 2017, 2016, and 2015, respectively.