Property, Plant and Equipment, Net (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

The estimated useful lives of the Company’s property, plant and equipment are as follows:

	Estimated Useful Life
Building and improvements	30 years
Furniture and fixtures	3-5 years
Computers and computer equipment	1-2 years
Computer software	2-3 years
Capitalized internal-use software development costs	2 years
Leasehold improvements	Shorter of estimated useful life or remaining lease term

Property, plant and equipment, net consisted of the following as of the dates indicated (in thousands):

	December 31,
	2019		2018
Building and improvements	$	—	$	33,277
Capitalized internal-use software development costs	44,194		35,201
Furniture and fixtures	3,861		3,557
Computers and computer equipment	14,836		11,676
Leasehold improvements	8,393		5,084
Finance lease right-of-use assets	1,005		—
	72,289		88,795
Less: Accumulated depreciation and amortization	(52,554)		(44,576)
Property, plant and equipment, net	$	19,735	$	44,219

Capitalized Internal-Use Software Development Costs

The Company recorded the following amounts related to depreciation of fixed assets and capitalized internal-use software development costs during the periods indicated (in thousands):

	Year Ended December 31,
	2019		2018		2017
Depreciation expense	$	5,950	$	5,201	$	4,073
Capitalized internal-use software development costs	8,993		7,809		6,725
Amortization of capitalized internal-use software development costs	7,562		6,240		5,102