Premises and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Premises and Equipment

Premises and Equipment

The components of premises and equipment are as follows:

	As of December 31,				Estimated
(In thousands)	2015		2014		useful lives
Land	$	57,040	$	60,397	-
Buildings	309,754		308,144		10-35 yrs
Equipment	182,385		176,906		3-15 yrs
Leasehold improvements	24,765		25,151		1-20 yrs
Software	116,280		103,782		3-7 yrs
	690,224		674,380
Less accumulated depreciation and amortization	370,736		342,083
Total premises and equipment	$	319,488	$	332,297

Amounts included in noninterest expense in the accompanying Consolidated Statement of Income for depreciation and amortization aggregated $40.7 million, $37.6 million, and $32.2 million for the years ended 2015, 2014, and 2013, respectively.