Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets Subject to Amortization

	June 30, 2020				December 31, 2019
	Gross			Net	Gross			Net
	carrying		Accumulated	carrying	carrying		Accumulated	carrying
	amount		amortization	amount	amount		amortization	amount
	amounts in thousands
Customer relationships	$	408,267	(112,192)	296,075		408,267	(95,167)	313,100
Other amortizable intangibles		145,028	(71,522)	73,506		139,721	(60,842)	78,879
Total	$	553,295	(183,714)	369,581		547,988	(156,009)	391,979

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Amortization expense for amortizable intangible assets for each of the five succeeding fiscal years is estimated to be (amounts in thousands):

Remainder of 2020	$	27,713
2021	$	45,434
2022	$	39,491
2023	$	34,966
2024	$	31,081