Segment and Geographic Area Information - Revenue by segment information (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Segment information
Number of segments \| segment	3
Revenue	$ 365,451	$ 404,357
Cost of revenue (exclusive of depreciation and amortization)	292,539	310,601
Segment profit	72,912	93,756
Selling, general and administrative expenses (exclusive of depreciation and amortization)	50,374	49,677
Depreciation and amortization	23,185	26,624
Impairment of goodwill and other intangible assets			$ 349,600	$ 48,100
Related party expense	1,551	998
Interest expense, net	41,588	39,701
Sundry expense, net	1,082	2,715
Other expense, net	(34,657)	1,493
Net loss before income taxes	(10,211)	(27,452)
ITPS
Segment information
Revenue	284,112	325,172
Cost of revenue (exclusive of depreciation and amortization)	235,120	259,272
Segment profit	48,992	65,900
HS
Segment information
Revenue	64,049	61,343
Cost of revenue (exclusive of depreciation and amortization)	44,931	40,341
Segment profit	19,118	21,002
LLPS
Segment information
Revenue	17,290	17,842
Cost of revenue (exclusive of depreciation and amortization)	12,488	10,988
Segment profit	$ 4,802	$ 6,854

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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