Goodwill and other intangible assets (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2020

Dec. 31, 2019

Goodwill and other intangible assets

Schedule of changes in carrying amount of goodwill

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
	(in thousands)
Goodwill, beginning of period	$	539,818	$	529,145	$	539,818	$	501,145
Goodwill acquired		—		10,673		—		38,673
Goodwill, end of period	$	539,818	$	539,818	$	539,818	$	539,818

	Years Ended
	December 31,
($000's)	2019		2018
Goodwill, beginning of period	$	501,145	$	499,892
Goodwill acquired		38,673		1,253
Goodwill, end of period	$	539,818	$	501,145

Schedule of gross carrying amount and accumulated amortization of intangible assets other than goodwill

								Weighted‑
								Average
				Accumulated		Net Carrying		Remaining
	Useful Life	Gross Value		Amortization		Value		Useful Life
		(in thousands)
Trademarks	1‑8 years	$	34,320	$	9,167	$	25,153	5.8 years
Customer relationships	2‑12 years		214,320		37,564		176,756	9.7 years
Developed technology	5 years		53,560		20,419		33,141	3.2 years
Non‑competes	2 years		90		41		49	1.1 years
Balance, December 31, 2019		$	302,290	$	67,191	$	235,099
Trademarks	8 years	$	34,320	$	12,383	$	21,937	5.1 years
Customer relationships	2‑12 years		214,320		51,259		163,061	9.0 years
Developed technology	5 years		53,560		28,453		25,107	2.4 years
Non‑competes	2 years		90		75		15	0.3 years
Balance, September 30, 2020		$	302,290	$	92,170	$	210,120

								Weighted‑
								Average
				Accumulated		Net Carrying		Remaining
($000's)	Useful Life	Gross Value		Amortization		Value		Useful Life
Trademarks	8 years	$	34,300	$	4,859	$	29,441
Customer relationships	2 - 12 years		206,420		19,497		186,923
Developed technology	5 years		45,960		10,153		35,807
Balance, December 31, 2018		$	286,680	$	34,509	$	252,171
Trademarks	1 - 8 years		34,320		9,167		25,153	5.8 Years
Customer relationships	2 - 12 years		214,320		37,564		176,756	9.7 Years
Developed technology	5 years		53,560		20,419		33,141	3.2 Years
Non‑competes	2 years		90		41		49	1.1 Years
Balance, December 31, 2019		$	302,290	$	67,191	$	235,099

Schedule of future estimated amortization expense

($000’s)
Years ending December 31:
2020	$	33,290
2021		33,187
2022		32,003
2023		24,218
2024		22,921
Thereafter		89,480
	$	235,099