Premises, Equipment, and Leases (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Summary of Premises and Equipment

Premises and equipment on December 31 are summarized below:

(Dollars in thousands)	2018		2017
Land	$	107,864	$	104,454
Buildings	461,665		472,619
Leasehold improvements	30,230		26,640
Furniture, fixtures, and equipment	196,469		194,057
Fixed assets held-for-sale (a)	19,617		53,195
Premises and equipment, at cost	815,845		850,965
Less accumulated depreciation and amortization	321,804		318,714
Premises and equipment, net	$	494,041	$	532,251

(a) Primarily comprised of land and buildings.

Minimum Future Lease Payments for Noncancelable Operating Leases on Premises and Equipment

Minimum future lease payments for noncancelable operating leases, primarily on premises, on December 31, 2018 are shown below. Aggregate minimum income under sublease agreements for these periods is not material.

(Dollars in thousands)
2019	$	27,524
2020	24,722
2021	20,954
2022	16,518
2023	13,174
2024 and after	42,370
Total minimum lease payments	$	145,262

Rent Expense Incurred Under All Operating Lease Obligations

Rent expense incurred under all operating lease obligations for the years ended December 31 is as follows:

(Dollars in thousands)	2018			2017			2016
Rent expense, gross	$	34,729		$	23,116		$	20,812
Sublease income	(647		)	(631		)	(477		)
Rent expense, net	$	34,082		$	22,485		$	20,335