Premises and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Premises and Equipment

NOTE 6 PREMISES AND EQUIPMENT:

See Note 1 for the Corporation’s accounting policy for premises and equipment. A summary of premises and equipment at December 31 was as follows.

		2015						2014
	Estimated Useful Lives	Cost		Accumulated Depreciation		Net Book Value		Net Book Value
		($ in Thousands)
Land	—	$	52,104	$	—	$	52,104	$	52,790
Land improvements	3 – 15 years	11,570		4,909		6,661		6,608
Buildings	5 – 39 years	261,418		119,986		141,432		139,702
Computers	3 – 5 years	37,875		31,503		6,372		7,518
Furniture, fixtures and other equipment	3 – 15 years	159,094		109,300		49,794		55,747
Leasehold improvements	3 – 15 years	31,769		20,526		11,243		12,323
Total premises and equipment		$	553,830	$	286,224	$	267,606	$	274,688

Depreciation and amortization of premises and equipment totaled $33 million in 2015, $34 million in 2014, and $33 million in 2013.

The Corporation and certain subsidiaries are obligated under noncancelable operating leases for other facilities and equipment, certain of which provide for increased rentals based upon increases in cost of living adjustments and other operating costs. The approximate minimum annual rentals and commitments under these noncancelable agreements and leases with remaining terms in excess of one year are as follows.

	($ in Thousands)
2016	$	10,417
2017	9,957
2018	8,678
2019	8,348
2020	7,583
Thereafter	17,968
Total	$	62,951

Total rental expense under leases, net of sublease income, totaled $13 million in 2015, $11 million in 2014, and $13 million in 2013, respectively.