Premises and Equipment

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Premises and Equipment Disclosure [Text Block]

Premises and Equipment

Premises and equipment at December 31 are summarized as follows (in thousands):

	December 31,
	2018		2017
Land	$	70,575	$	71,348
Buildings and improvements	266,733		249,139
Software	150,207		188,826
Furniture and equipment	129,988		223,163
Construction in progress	27,514		23,348
Premises and equipment	645,017		755,824
Less accumulated depreciation	314,984		438,489
Premises and equipment, net of accumulated depreciation	$	330,033	$	317,335

Depreciation expense of premises and equipment was $51 million, $48 million and $40 million for the years ended December 31, 2018, 2017 and 2016, respectively.