Property, Plant and Equipment

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, plant and equipment, net consisted of the following at December 31 (in thousands):


	Estimated Useful Lives (in Years)	2020		2019
Computer hardware and software	3 to 5	$	393,217	$	341,282
Card-reading equipment	4 to 6	25,427		24,077
Furniture, fixtures, and vehicles	2 to 10	19,575		19,319
Buildings and improvements	5 to 50	30,467		29,127
Property, plant and equipment, gross		468,686		413,805
Less: accumulated depreciation		(266,177)		(213,980)
Property, plant and equipment, net		$	202,509	$	199,825

Depreciation expense related to property and equipment for the years ended December 31, 2020, 2019, and 2018 was $65.2 million, $62.8 million and $52.9 million, respectively. Amortization expense includes $40.2 million, $37.2 million and $24.2 million for capitalized computer software costs for the years ended December 31, 2020, 2019 and 2018, respectively. At December 31, 2020 and 2019, the Company had unamortized computer software costs of $129.9 million and $118.8 million, respectively.

The Company recorded write-offs of property, plant and equipment of $0.3 million, $1.8 million and $8.7 million in other operating (income) expense, net within its Consolidated Statements of Income for the years ended December 31, 2020, 2019, and 2018, respectively.