Segment and Geographic Area Information - Revenue by segment information (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)
Segment information
Number of segments \| segment			3
Revenue	$ 307,722	$ 390,849	$ 673,173	$ 795,206
Cost of revenue (exclusive of depreciation and amortization)	241,788	303,831	534,326	614,432
Segment profit	65,934	87,018	138,847	180,774
Selling, general and administrative expenses (exclusive of depreciation and amortization)	47,014	51,162	97,387	100,839
Depreciation and amortization	22,847	24,779	46,032	51,403
Related party expense	1,146	5,331	2,698	6,329
Interest expense, net	44,440	39,959	86,028	79,660
Debt modification and extinguishment costs		1,404		1,404
Sundry expense (income), net	(899)	(1,311)	183	1,404
Other expense (income), net	(584)	2,527	(35,241)	4,020
Net loss before income taxes	(48,030)	(36,833)	(58,240)	(64,285)
ITPS
Segment information
Revenue	243,029	309,840	527,140	635,012
Cost of revenue (exclusive of depreciation and amortization)	195,835	249,589	430,954	508,861
Segment profit	47,194	60,251	96,186	126,151
HS
Segment information
Revenue	49,166	63,440	113,216	124,783
Cost of revenue (exclusive of depreciation and amortization)	36,148	43,353	81,078	83,694
Segment profit	13,018	20,087	32,138	41,089
LLPS
Segment information
Revenue	15,527	17,569	32,817	35,411
Cost of revenue (exclusive of depreciation and amortization)	9,805	10,889	22,294	21,877
Segment profit	$ 5,722	$ 6,680	$ 10,523	$ 13,534

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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